Index: lnt/external/stats/pstat.py
===================================================================
--- lnt/external/stats/pstat.py
+++ lnt/external/stats/pstat.py
@@ -131,10 +131,10 @@
          'left', lists in <args> attached consecutively on the 'right'
 """
 
-    if type(source) not in [ListType,TupleType]:
+    if !isinstance(source, (list, tuple)):
         source = [source]
     for addon in args:
-        if type(addon) not in [ListType,TupleType]:
+        if !isinstance(addon, (list, tuple)):
             addon = [addon]
         if len(addon) < len(source):                # is source list longer?
             if len(source) % len(addon) == 0:        # are they integer multiples?
@@ -177,21 +177,21 @@
 Returns: a list of lists as long as source, with source on the 'left' and
                  addon on the 'right'
 """
-    if type(source) not in [ListType,TupleType]:
+    if !isinstance(source, (list, tuple)):
         source = [source]
-    if type(addon) not in [ListType,TupleType]:
+    if !isinstance(addon, (list, tuple)):
         addon = [addon]
     minlen = min(len(source),len(addon))
     list = copy.deepcopy(source)                # start abut process
-    if type(source[0]) not in [ListType,TupleType]:
-        if type(addon[0]) not in [ListType,TupleType]:
+    if !isinstance(source[0], (list, tuple)):
+        if !isinstance(addon[0], (list, tuple)):
             for i in range(minlen):
                 list[i] = [source[i]] + [addon[i]]        # source/addon = column
         else:
             for i in range(minlen):
                 list[i] = [source[i]] + addon[i]        # addon=list-of-lists
     else:
-        if type(addon[0]) not in [ListType,TupleType]:
+        if !isinstance(addon[0], (list, tuple)):
             for i in range(minlen):
                 list[i] = source[i] + [addon[i]]        # source=list-of-lists
         else:
@@ -214,13 +214,13 @@
 """
     global index
     column = 0
-    if type(cnums) in [ListType,TupleType]:   # if multiple columns to get
+    if isinstance(cnums, (list, tuple)):   # if multiple columns to get
         index = cnums[0]
         column = map(lambda x: x[index], listoflists)
         for col in cnums[1:]:
             index = col
             column = abut(column,map(lambda x: x[index], listoflists))
-    elif type(cnums) == StringType:              # if an 'x[3:]' type expr.
+    elif isinstance(cnums, str):              # if an 'x[3:]' type expr.
         evalstring = 'map(lambda x: x'+cnums+', listoflists)'
         column = eval(evalstring)
     else:                                     # else it's just 1 col to get
@@ -252,9 +252,9 @@
              s = s + item
          return s/float(len(inlist))
 
-     if type(keepcols) not in [ListType,TupleType]:
+     if !isinstance(keepcols, (list, tuple)):
          keepcols = [keepcols]
-     if type(collapsecols) not in [ListType,TupleType]:
+     if !isinstance(collapsecols, (list, tuple)):
          collapsecols = [collapsecols]
      if cfcn == None:
          cfcn = collmean
@@ -284,9 +284,9 @@
          uniques = unique(values)
          uniques.sort()
          newlist = []
-         if type(keepcols) not in [ListType,TupleType]:  keepcols = [keepcols]
+         if !isinstance(keepcols, (list, tuple)):  keepcols = [keepcols]
          for item in uniques:
-             if type(item) not in [ListType,TupleType]:  item =[item]
+             if !isinstance(item, (list, tuple)):  item =[item]
              tmprows = linexand(listoflists,keepcols,item)
              for col in collapsecols:
                  avgcol = colex(tmprows,col)
@@ -345,13 +345,13 @@
 Usage:   linexand (listoflists,columnlist,valuelist)
 Returns: the rows of listoflists where columnlist[i]=valuelist[i] for ALL i
 """
-    if type(columnlist) not in [ListType,TupleType]:
+    if !isinstance(columnlist, (list, tuple)):
         columnlist = [columnlist]
-    if type(valuelist) not in [ListType,TupleType]:
+    if !isinstance(valuelist, (list, tuple)):
         valuelist = [valuelist]
     criterion = ''
     for i in range(len(columnlist)):
-        if type(valuelist[i])==StringType:
+        if isinstance(valuelist[i], str):
             critval = '\'' + valuelist[i] + '\''
         else:
             critval = str(valuelist[i])
@@ -373,15 +373,15 @@
 Usage:   linexor (listoflists,columnlist,valuelist)
 Returns: the rows of listoflists where columnlist[i]=valuelist[i] for ANY i
 """
-    if type(columnlist) not in [ListType,TupleType]:
+    if !isinstance(columnlist, (list, tuple)):
         columnlist = [columnlist]
-    if type(valuelist) not in [ListType,TupleType]:
+    if !isinstance(valuelist, (list, tuple)):
         valuelist = [valuelist]
     criterion = ''
     if len(columnlist) == 1 and len(valuelist) > 1:
         columnlist = columnlist*len(valuelist)
     for i in range(len(columnlist)):          # build an exec string
-        if type(valuelist[i])==StringType:
+        if isinstance(valuelist[i], str):
             critval = '\'' + valuelist[i] + '\''
         else:
             critval = str(valuelist[i])
@@ -402,7 +402,7 @@
 """
     outstr = ''
     for item in inlist:
-        if type(item) <> StringType:
+        if !isinstance(item, str):
             item = str(item)
         outstr = outstr + item + delimiter
     outstr = outstr[0:-1]
@@ -418,7 +418,7 @@
 """
     outstr = ''
     for item in inlist:
-        if type(item) <> StringType:
+        if !isinstance(item, str):
             item = str(item)
         size = len(item)
         if size <= colsize:
@@ -442,7 +442,7 @@
 """
     outstr = ''
     for i in range(len(inlist)):
-        if type(inlist[i]) <> StringType:
+        if !isinstance(inlist[i], str):
             item = str(inlist[i])
         else:
             item = inlist[i]
@@ -483,7 +483,7 @@
 
 
 def makestr (x):
-    if type(x) <> StringType:
+    if !isinstance(x, str):
         x = str(x)
     return x
 
@@ -498,7 +498,7 @@
 Usage:   printcc (lst,extra=2)
 Returns: None
 """
-    if type(lst[0]) not in [ListType,TupleType]:
+    if !isinstance(lst[0], (list, tuple)):
         lst = [lst]
     rowstokill = []
     list2print = copy.deepcopy(lst)
@@ -568,7 +568,7 @@
 """
     lst = inlst*1
     for i in range(len(lst)):
-        if type(lst[i]) not in [ListType,TupleType]:
+        if !isinstance(lst[i], (list, tuple)):
             if lst[i]==oldval: lst[i]=newval
         else:
             lst[i] = replace(lst[i],oldval,newval)
@@ -586,7 +586,7 @@
 """
     lst = copy.deepcopy(inlist)
     if cols != None:
-        if type(cols) not in [ListType,TupleType]:
+        if !isinstance(cols, (list, tuple)):
             cols = [cols]
         for col in cols:
             for row in range(len(lst)):
@@ -623,17 +623,17 @@
 def roundlist (inlist,digits):
     """
 Goes through each element in a 1D or 2D inlist, and applies the following
-function to all elements of FloatType ... round(element,digits).
+function to all elements of float ... round(element,digits).
 
 Usage:   roundlist(inlist,digits)
 Returns: list with rounded floats
 """
-    if type(inlist[0]) in [IntType, FloatType]:
+    if isinstance(inlist[0], (int, float)):
         inlist = [inlist]
     l = inlist*1
     for i in range(len(l)):
         for j in range(len(l[i])):
-            if type(l[i][j])==FloatType:
+            if isinstance(l[i][j], float):
                 l[i][j] = round(l[i][j],digits)
     return l
 
@@ -756,7 +756,7 @@
 Usage:   acolex (a,indices,axis=1)
 Returns: the columns of a specified by indices
 """
-    if type(indices) not in [ListType,TupleType,N.ndarray]:
+    if !isinstance(indices, (list, tuple, N.ndarray)):
         indices = [indices]
     if len(N.shape(a)) == 1:
         cols = N.resize(a,[a.shape[0],1])
@@ -780,9 +780,9 @@
     def acollmean (inarray):
         return N.sum(N.ravel(inarray))
 
-    if type(keepcols) not in [ListType,TupleType,N.ndarray]:
+    if !isinstance(keepcols, (list, tuple, N.ndarray)):
         keepcols = [keepcols]
-    if type(collapsecols) not in [ListType,TupleType,N.ndarray]:
+    if !isinstance(collapsecols, (list, tuple, N.ndarray)):
         collapsecols = [collapsecols]
 
     if cfcn == None:
@@ -804,14 +804,14 @@
             means = aabut(means,test)
         return means
     else:
-        if type(keepcols) not in [ListType,TupleType,N.ndarray]:
+        if !isinstance(keepcols, (list, tuple, N.ndarray)):
             keepcols = [keepcols]
         values = colex(a,keepcols)   # so that "item" can be appended (below)
         uniques = unique(values)  # get a LIST, so .sort keeps rows intact
         uniques.sort()
         newlist = []
         for item in uniques:
-            if type(item) not in [ListType,TupleType,N.ndarray]:
+            if !isinstance(item, (list, tuple, N.ndarray)):
                 item =[item]
             tmprows = alinexand(a,keepcols,item)
             for col in collapsecols:
@@ -854,7 +854,7 @@
 
 
  def isstring(x):
-    if type(x)==StringType:
+    if isinstance(x, str):
         return 1
     else:
         return 0
@@ -868,13 +868,13 @@
 Usage:   alinexand (a,columnlist,valuelist)
 Returns: the rows of a where columnlist[i]=valuelist[i] for ALL i
 """
-    if type(columnlist) not in [ListType,TupleType,N.ndarray]:
+    if !isinstance(columnlist, (list, tuple, N.ndarray)):
         columnlist = [columnlist]
-    if type(valuelist) not in [ListType,TupleType,N.ndarray]:
+    if !isinstance(valuelist, (list, tuple, N.ndarray)):
         valuelist = [valuelist]
     criterion = ''
     for i in range(len(columnlist)):
-        if type(valuelist[i])==StringType:
+        if isinstance(valuelist[i], str):
             critval = '\'' + valuelist[i] + '\''
         else:
             critval = str(valuelist[i])
@@ -894,9 +894,9 @@
 Usage:   alinexor (a,columnlist,valuelist)
 Returns: the rows of a where columnlist[i]=valuelist[i] for ANY i
 """
-    if type(columnlist) not in [ListType,TupleType,N.ndarray]:
+    if !isinstance(columnlist, (list, tuple, N.ndarray)):
         columnlist = [columnlist]
-    if type(valuelist) not in [ListType,TupleType,N.ndarray]:
+    if !isinstance(valuelist, (list, tuple, N.ndarray)):
         valuelist = [valuelist]
     criterion = ''
     if len(columnlist) == 1 and len(valuelist) > 1:
@@ -904,7 +904,7 @@
     elif len(valuelist) == 1 and len(columnlist) > 1:
         valuelist = valuelist*len(columnlist)
     for i in range(len(columnlist)):
-        if type(valuelist[i])==StringType:
+        if isinstance(valuelist[i], str):
             critval = '\'' + valuelist[i] + '\''
         else:
             critval = str(valuelist[i])
@@ -939,7 +939,7 @@
         work = acolex(a,col)
         work = work.ravel()
     for pair in listmap:
-        if type(pair[1]) == StringType or work.dtype.char=='O' or a.dtype.char=='O':
+        if isinstance(pair[1], str) or work.dtype.char == 'O' or a.dtype.char == 'O':
             work = N.array(work,dtype='O')
             a = N.array(a,dtype='O')
             for i in range(len(work)):
Index: lnt/external/stats/stats.py
===================================================================
--- lnt/external/stats/stats.py
+++ lnt/external/stats/stats.py
@@ -246,13 +246,12 @@
         self._dispatch = {}
         for func, types in tuples:
             for t in types:
-                if t in self._dispatch.keys():
+                if t in self._dispatch:
                     raise ValueError, "can't have two dispatches on "+str(t)
                 self._dispatch[t] = func
-        self._types = self._dispatch.keys()
 
     def __call__(self, arg1, *args, **kw):
-        if type(arg1) not in self._types:
+        if type(arg1) not in self._dispatch:
             raise TypeError, "don't know how to dispatch %s arguments" %  type(arg1)
         return apply(self._dispatch[type(arg1)], (arg1,) + args, kw)
 
@@ -513,7 +512,7 @@
 Returns: list of bin values, lowerreallimit, binsize, extrapoints
 """
     if (defaultreallimits <> None):
-        if type(defaultreallimits) not in [ListType,TupleType] or len(defaultreallimits)==1: # only one limit given, assumed to be lower one & upper is calc'd
+        if !isinstance(defaultreallimits, (list, tuple)) or len(defaultreallimits) == 1: # only one limit given, assumed to be lower one & upper is calc'd
             lowerreallimit = defaultreallimits
             upperreallimit = 1.000001 * max(inlist)
         else: # assume both limits given
@@ -1618,7 +1617,7 @@
 Usage:   writecc (listoflists,file,writetype='w',extra=2)
 Returns: None
 """
-    if type(listoflists[0]) not in [ListType,TupleType]:
+    if !isinstance(listoflists[0], (list, tuple)):
         listoflists = [listoflists]
     outfile = open(file,writetype)
     rowstokill = []
@@ -1821,7 +1820,7 @@
     title = [['Name','N','Mean','SD','Min','Max']]
     lofl = title+[[name1,n1,round(m1,3),round(math.sqrt(se1),3),min1,max1],
                   [name2,n2,round(m2,3),round(math.sqrt(se2),3),min2,max2]]
-    if type(fname)<>StringType or len(fname)==0:
+    if !isinstance(fname, str) or len(fname) == 0:
         print()
         print(statname)
         print()
@@ -1886,89 +1885,89 @@
 #########################################################
 
 ## CENTRAL TENDENCY:
-geometricmean = Dispatch ( (lgeometricmean, (ListType, TupleType)), )
-harmonicmean = Dispatch ( (lharmonicmean, (ListType, TupleType)), )
-mean = Dispatch ( (lmean, (ListType, TupleType)), )
-median = Dispatch ( (lmedian, (ListType, TupleType)), )
-medianscore = Dispatch ( (lmedianscore, (ListType, TupleType)), )
-mode = Dispatch ( (lmode, (ListType, TupleType)), )
+geometricmean = Dispatch ( (lgeometricmean, (list, tuple)), )
+harmonicmean = Dispatch ( (lharmonicmean, (list, tuple)), )
+mean = Dispatch ( (lmean, (list, tuple)), )
+median = Dispatch ( (lmedian, (list, tuple)), )
+medianscore = Dispatch ( (lmedianscore, (list, tuple)), )
+mode = Dispatch ( (lmode, (list, tuple)), )
 
 ## MOMENTS:
-moment = Dispatch ( (lmoment, (ListType, TupleType)), )
-variation = Dispatch ( (lvariation, (ListType, TupleType)), )
-skew = Dispatch ( (lskew, (ListType, TupleType)), )
-kurtosis = Dispatch ( (lkurtosis, (ListType, TupleType)), )
-describe = Dispatch ( (ldescribe, (ListType, TupleType)), )
+moment = Dispatch ( (lmoment, (list, tuple)), )
+variation = Dispatch ( (lvariation, (list, tuple)), )
+skew = Dispatch ( (lskew, (list, tuple)), )
+kurtosis = Dispatch ( (lkurtosis, (list, tuple)), )
+describe = Dispatch ( (ldescribe, (list, tuple)), )
 
 ## FREQUENCY STATISTICS:
-itemfreq = Dispatch ( (litemfreq, (ListType, TupleType)), )
-scoreatpercentile = Dispatch ( (lscoreatpercentile, (ListType, TupleType)), )
-percentileofscore = Dispatch ( (lpercentileofscore, (ListType, TupleType)), )
-histogram = Dispatch ( (lhistogram, (ListType, TupleType)), )
-cumfreq = Dispatch ( (lcumfreq, (ListType, TupleType)), )
-relfreq = Dispatch ( (lrelfreq, (ListType, TupleType)), )
+itemfreq = Dispatch ( (litemfreq, (list, tuple)), )
+scoreatpercentile = Dispatch ( (lscoreatpercentile, (list, tuple)), )
+percentileofscore = Dispatch ( (lpercentileofscore, (list, tuple)), )
+histogram = Dispatch ( (lhistogram, (list, tuple)), )
+cumfreq = Dispatch ( (lcumfreq, (list, tuple)), )
+relfreq = Dispatch ( (lrelfreq, (list, tuple)), )
 
 ## VARIABILITY:
-obrientransform = Dispatch ( (lobrientransform, (ListType, TupleType)), )
-samplevar = Dispatch ( (lsamplevar, (ListType, TupleType)), )
-samplestdev = Dispatch ( (lsamplestdev, (ListType, TupleType)), )
-var = Dispatch ( (lvar, (ListType, TupleType)), )
-stdev = Dispatch ( (lstdev, (ListType, TupleType)), )
-sterr = Dispatch ( (lsterr, (ListType, TupleType)), )
-sem = Dispatch ( (lsem, (ListType, TupleType)), )
-z = Dispatch ( (lz, (ListType, TupleType)), )
-zs = Dispatch ( (lzs, (ListType, TupleType)), )
+obrientransform = Dispatch ( (lobrientransform, (list, tuple)), )
+samplevar = Dispatch ( (lsamplevar, (list, tuple)), )
+samplestdev = Dispatch ( (lsamplestdev, (list, tuple)), )
+var = Dispatch ( (lvar, (list, tuple)), )
+stdev = Dispatch ( (lstdev, (list, tuple)), )
+sterr = Dispatch ( (lsterr, (list, tuple)), )
+sem = Dispatch ( (lsem, (list, tuple)), )
+z = Dispatch ( (lz, (list, tuple)), )
+zs = Dispatch ( (lzs, (list, tuple)), )
 
 ## TRIMMING FCNS:
-trimboth = Dispatch ( (ltrimboth, (ListType, TupleType)), )
-trim1 = Dispatch ( (ltrim1, (ListType, TupleType)), )
+trimboth = Dispatch ( (ltrimboth, (list, tuple)), )
+trim1 = Dispatch ( (ltrim1, (list, tuple)), )
 
 ## CORRELATION FCNS:
-paired = Dispatch ( (lpaired, (ListType, TupleType)), )
-pearsonr = Dispatch ( (lpearsonr, (ListType, TupleType)), )
-spearmanr = Dispatch ( (lspearmanr, (ListType, TupleType)), )
-pointbiserialr = Dispatch ( (lpointbiserialr, (ListType, TupleType)), )
-kendalltau = Dispatch ( (lkendalltau, (ListType, TupleType)), )
-linregress = Dispatch ( (llinregress, (ListType, TupleType)), )
+paired = Dispatch ( (lpaired, (list, tuple)), )
+pearsonr = Dispatch ( (lpearsonr, (list, tuple)), )
+spearmanr = Dispatch ( (lspearmanr, (list, tuple)), )
+pointbiserialr = Dispatch ( (lpointbiserialr, (list, tuple)), )
+kendalltau = Dispatch ( (lkendalltau, (list, tuple)), )
+linregress = Dispatch ( (llinregress, (list, tuple)), )
 
 ## INFERENTIAL STATS:
-ttest_1samp = Dispatch ( (lttest_1samp, (ListType, TupleType)), )
-ttest_ind = Dispatch ( (lttest_ind, (ListType, TupleType)), )
-ttest_rel = Dispatch ( (lttest_rel, (ListType, TupleType)), )
-chisquare = Dispatch ( (lchisquare, (ListType, TupleType)), )
-ks_2samp = Dispatch ( (lks_2samp, (ListType, TupleType)), )
-mannwhitneyu = Dispatch ( (lmannwhitneyu, (ListType, TupleType)), )
-ranksums = Dispatch ( (lranksums, (ListType, TupleType)), )
-tiecorrect = Dispatch ( (ltiecorrect, (ListType, TupleType)), )
-wilcoxont = Dispatch ( (lwilcoxont, (ListType, TupleType)), )
-kruskalwallish = Dispatch ( (lkruskalwallish, (ListType, TupleType)), )
-friedmanchisquare = Dispatch ( (lfriedmanchisquare, (ListType, TupleType)), )
+ttest_1samp = Dispatch ( (lttest_1samp, (list, tuple)), )
+ttest_ind = Dispatch ( (lttest_ind, (list, tuple)), )
+ttest_rel = Dispatch ( (lttest_rel, (list, tuple)), )
+chisquare = Dispatch ( (lchisquare, (list, tuple)), )
+ks_2samp = Dispatch ( (lks_2samp, (list, tuple)), )
+mannwhitneyu = Dispatch ( (lmannwhitneyu, (list, tuple)), )
+ranksums = Dispatch ( (lranksums, (list, tuple)), )
+tiecorrect = Dispatch ( (ltiecorrect, (list, tuple)), )
+wilcoxont = Dispatch ( (lwilcoxont, (list, tuple)), )
+kruskalwallish = Dispatch ( (lkruskalwallish, (list, tuple)), )
+friedmanchisquare = Dispatch ( (lfriedmanchisquare, (list, tuple)), )
 
 ## PROBABILITY CALCS:
-chisqprob = Dispatch ( (lchisqprob, (IntType, FloatType)), )
-zprob = Dispatch ( (lzprob, (IntType, FloatType)), )
-ksprob = Dispatch ( (lksprob, (IntType, FloatType)), )
-fprob = Dispatch ( (lfprob, (IntType, FloatType)), )
-betacf = Dispatch ( (lbetacf, (IntType, FloatType)), )
-betai = Dispatch ( (lbetai, (IntType, FloatType)), )
-erfcc = Dispatch ( (lerfcc, (IntType, FloatType)), )
-gammln = Dispatch ( (lgammln, (IntType, FloatType)), )
+chisqprob = Dispatch ( (lchisqprob, (int, float)), )
+zprob = Dispatch ( (lzprob, (int, float)), )
+ksprob = Dispatch ( (lksprob, (int, float)), )
+fprob = Dispatch ( (lfprob, (int, float)), )
+betacf = Dispatch ( (lbetacf, (int, float)), )
+betai = Dispatch ( (lbetai, (int, float)), )
+erfcc = Dispatch ( (lerfcc, (int, float)), )
+gammln = Dispatch ( (lgammln, (int, float)), )
 
 ## ANOVA FUNCTIONS:
-F_oneway = Dispatch ( (lF_oneway, (ListType, TupleType)), )
-F_value = Dispatch ( (lF_value, (ListType, TupleType)), )
+F_oneway = Dispatch ( (lF_oneway, (list, tuple)), )
+F_value = Dispatch ( (lF_value, (list, tuple)), )
 
 ## SUPPORT FUNCTIONS:
-incr = Dispatch ( (lincr, (ListType, TupleType)), )
-sum = Dispatch ( (lsum, (ListType, TupleType)), )
-cumsum = Dispatch ( (lcumsum, (ListType, TupleType)), )
-ss = Dispatch ( (lss, (ListType, TupleType)), )
-summult = Dispatch ( (lsummult, (ListType, TupleType)), )
-square_of_sums = Dispatch ( (lsquare_of_sums, (ListType, TupleType)), )
-sumdiffsquared = Dispatch ( (lsumdiffsquared, (ListType, TupleType)), )
-shellsort = Dispatch ( (lshellsort, (ListType, TupleType)), )
-rankdata = Dispatch ( (lrankdata, (ListType, TupleType)), )
-findwithin = Dispatch ( (lfindwithin, (ListType, TupleType)), )
+incr = Dispatch ( (lincr, (list, tuple)), )
+sum = Dispatch ( (lsum, (list, tuple)), )
+cumsum = Dispatch ( (lcumsum, (list, tuple)), )
+ss = Dispatch ( (lss, (list, tuple)), )
+summult = Dispatch ( (lsummult, (list, tuple)), )
+square_of_sums = Dispatch ( (lsquare_of_sums, (list, tuple)), )
+sumdiffsquared = Dispatch ( (lsumdiffsquared, (list, tuple)), )
+shellsort = Dispatch ( (lshellsort, (list, tuple)), )
+rankdata = Dispatch ( (lrankdata, (list, tuple)), )
+findwithin = Dispatch ( (lfindwithin, (list, tuple)), )
 
 
 #=============  THE ARRAY-VERSION OF THE STATS FUNCTIONS  ===============
@@ -2019,7 +2018,7 @@
         size = len(inarray)
         mult = N.power(inarray,1.0/size)
         mult = N.multiply.reduce(mult)
-    elif type(dimension) in [IntType,FloatType]:
+    elif isinstance(dimension, (int, float)):
         size = inarray.shape[dimension]
         mult = N.power(inarray,1.0/size)
         mult = N.multiply.reduce(mult,dimension)
@@ -2061,7 +2060,7 @@
         inarray = N.ravel(inarray)
         size = len(inarray)
         s = N.add.reduce(1.0 / inarray)
-    elif type(dimension) in [IntType,FloatType]:
+    elif isinstance(dimension, (int, float)):
         size = float(inarray.shape[dimension])
         s = N.add.reduce(1.0/inarray, dimension)
         if keepdims == 1:
@@ -2116,7 +2115,7 @@
         inarray = N.ravel(inarray)
         sum = N.add.reduce(inarray)
         denom = float(len(inarray))
-    elif type(dimension) in [IntType,FloatType]:
+    elif isinstance(dimension, (int, float)):
         sum = asum(inarray,dimension)
         denom = float(inarray.shape[dimension])
         if keepdims == 1:
@@ -2230,7 +2229,7 @@
          a = a.astype(N.float_)
      if limits == None:
          return mean(a)
-     assert type(limits) in [ListType,TupleType,N.ndarray], "Wrong type for limits in atmean"
+     assert isinstance(limits, (list, tuple, N.ndarray)), "Wrong type for limits in atmean"
      if inclusive[0]:         lowerfcn = N.greater_equal
      else:               lowerfcn = N.greater
      if inclusive[1]:         upperfcn = N.less_equal
@@ -2262,7 +2261,7 @@
      a = a.astype(N.float_)
      if limits == None or limits == [None,None]:
          return avar(a)
-     assert type(limits) in [ListType,TupleType,N.ndarray], "Wrong type for limits in atvar"
+     assert isinstance(limits, (list, tuple, N.ndarray)), "Wrong type for limits in atvar"
      if inclusive[0]:    lowerfcn = N.greater_equal
      else:               lowerfcn = N.greater
      if inclusive[1]:    upperfcn = N.less_equal
@@ -2348,7 +2347,7 @@
      if limits == None or limits == [None,None]:
          n = float(len(N.ravel(a)))
          limits = [min(a)-1, max(a)+1]
-     assert type(limits) in [ListType,TupleType,N.ndarray], "Wrong type for limits in atsem"
+     assert isinstance(limits, (list, tuple, N.ndarray)), "Wrong type for limits in atsem"
      if inclusive[0]:         lowerfcn = N.greater_equal
      else:               lowerfcn = N.greater
      if inclusive[1]:         upperfcn = N.less_equal
@@ -2417,7 +2416,7 @@
 """
     denom = N.power(amoment(a,2,dimension),1.5)
     zero = N.equal(denom,0)
-    if type(denom) == N.ndarray and asum(zero) <> 0:
+    if isinstance(denom, N.ndarray) and asum(zero) <> 0:
         print("Number of zeros in askew: ", asum(zero))
     denom = denom + zero  # prevent divide-by-zero
     return N.where(zero, 0, amoment(a,3,dimension)/denom)
@@ -2436,7 +2435,7 @@
 """
     denom = N.power(amoment(a,2,dimension),2)
     zero = N.equal(denom,0)
-    if type(denom) == N.ndarray and asum(zero) <> 0:
+    if isinstance(denom, N.ndarray) and asum(zero) <> 0:
         print("Number of zeros in akurtosis: ", asum(zero))
     denom = denom + zero  # prevent divide-by-zero
     return N.where(zero,0,amoment(a,4,dimension)/denom)
@@ -2722,7 +2721,7 @@
     else:
         mn = amean(inarray,dimension,keepdims=1)
     deviations = inarray - mn 
-    if type(dimension) == ListType:
+    if isinstance(dimension, list):
         n = 1
         for d in dimension:
             n = n*inarray.shape[d]
@@ -2778,7 +2777,7 @@
     xdeviations = x - xmn
     ymn = amean(y,dimension,1)  # keepdims
     ydeviations = y - ymn
-    if type(dimension) == ListType:
+    if isinstance(dimension, list):
         n = 1
         for d in dimension:
             n = n*x.shape[d]
@@ -2803,7 +2802,7 @@
         dimension = 0
     mn = amean(inarray,dimension,1)
     deviations = inarray - mn
-    if type(dimension) == ListType:
+    if isinstance(dimension, list):
         n = 1
         for d in dimension:
             n = n*inarray.shape[d]
@@ -2855,7 +2854,7 @@
     if dimension == None:
         inarray = N.ravel(inarray)
         dimension = 0
-    if type(dimension) == ListType:
+    if isinstance(dimension, list):
         n = 1
         for d in dimension:
             n = n*inarray.shape[d]
@@ -3319,7 +3318,7 @@
 Usage:   attest_1samp(a,popmean,Name='Sample',printit=0,writemode='a')
 Returns: t-value, two-tailed prob
 """
-    if type(a) != N.ndarray:
+    if !isinstance(a, N.ndarray):
         a = N.array(a)
     x = amean(a)
     v = avar(a)
@@ -3370,15 +3369,15 @@
     t = N.where(zerodivproblem,1.0,t)     # replace NaN/wrong t-values with 1.0
     probs = abetai(0.5*df,0.5,float(df)/(df+t*t))
 
-    if type(t) == N.ndarray:
+    if isinstance(t, N.ndarray):
         probs = N.reshape(probs,t.shape)
     if probs.shape == (1,):
         probs = probs[0]
         
     if printit <> 0:
-        if type(t) == N.ndarray:
+        if isinstance(t, N.ndarray):
             t = t[0]
-        if type(probs) == N.ndarray:
+        if isinstance(probs, N.ndarray):
             probs = probs[0]
         statname = 'Independent samples T-test.'
         outputpairedstats(printit,writemode,
@@ -3453,7 +3452,7 @@
     t = N.add.reduce(d,dimension) / denom      # N-D COMPUTATION HERE!!!!!!
     t = N.where(zerodivproblem,1.0,t)     # replace NaN/wrong t-values with 1.0
     probs = abetai(0.5*df,0.5,float(df)/(df+t*t))
-    if type(t) == N.ndarray:
+    if isinstance(t, N.ndarray):
         probs = N.reshape(probs,t.shape)
     if probs.shape == (1,):
         probs = probs[0]
@@ -3714,7 +3713,7 @@
         exponents = N.where(N.less(x,-BIG),-BIG,x)
         return N.exp(exponents)
 
-    if type(chisq) == N.ndarray:
+    if isinstance(chisq, N.ndarray):
         arrayflag = 1
     else:
         arrayflag = 0
@@ -3842,7 +3841,7 @@
 
 Usage:   aksprob(alam)
 """
-     if type(alam) == N.ndarray:
+     if isinstance(alam, N.ndarray):
          frozen = -1 *N.ones(alam.shape,N.float64)
          alam = alam.astype(N.float64)
          arrayflag = 1
@@ -3885,7 +3884,7 @@
 
 Usage:   afprob(dfnum, dfden, F)   where usually dfnum=dfbn, dfden=dfwn
 """
-    if type(F) == N.ndarray:
+    if isinstance(F, N.ndarray):
         return abetai(0.5*dfden, 0.5*dfnum, dfden/(1.0*dfden+dfnum*F))
     else:
         return abetai(0.5*dfden, 0.5*dfnum, dfden/float(dfden+dfnum*F))
@@ -3903,7 +3902,7 @@
     EPS = 3.0e-7
 
     arrayflag = 1
-    if type(x) == N.ndarray:
+    if isinstance(x, N.ndarray):
         frozen = N.ones(x.shape,N.float_) *-1  #start out w/ -1s, should replace all
     else:
         arrayflag = 0
@@ -3978,7 +3977,7 @@
 Usage:   abetai(a,b,x,verbose=1)
 """
     TINY = 1e-15
-    if type(a) == N.ndarray:
+    if isinstance(a, N.ndarray):
         if asum(N.less(x,0)+N.greater(x,1)) <> 0:
             raise ValueError, 'Bad x in abetai'
     x = N.where(N.equal(x,0),TINY,x)
@@ -3990,7 +3989,7 @@
     # 746 (below) is the MAX POSSIBLE BEFORE OVERFLOW
     exponents = N.where(N.less(exponents,-740),-740,exponents)
     bt = N.exp(exponents)
-    if type(x) == N.ndarray:
+    if isinstance(x, N.ndarray):
         ans = N.where(N.less(x,(a+1)/(a+b+2.0)),
                       bt*abetacf(a,b,x,verbose)/float(a),
                       1.0-bt*abetacf(b,a,1.0-x,verbose)/float(b))
@@ -4116,9 +4115,9 @@
         dfF = degrees of freedom associated with the Restricted model
 where ER and EF are matrices from a multivariate F calculation.
 """
-     if type(ER) in [IntType, FloatType]:
+     if isinstance(ER, (int, float)):
          ER = N.array([[ER]])
-     if type(EF) in [IntType, FloatType]:
+     if isinstance(EF, (int, float)):
          EF = N.array([[EF]])
      n_um = (LA.det(ER) - LA.det(EF)) / float(dfnum)
      d_en = LA.det(EF) / float(dfden)
@@ -4135,7 +4134,7 @@
 Returns: array shape of a, with -1 where a<0 and +1 where a>=0
 """
     a = N.asarray(a)
-    if ((type(a) == type(1.4)) or (type(a) == type(1))):
+    if isinstance(a, (int, float)):
         return a-a-N.less(a,0)+N.greater(a,0)
     else:
         return N.zeros(N.shape(a))-N.less(a,0)+N.greater(a,0)
@@ -4154,11 +4153,11 @@
 Usage:   asum(a, dimension=None, keepdims=0)
 Returns: array summed along 'dimension'(s), same _number_ of dims if keepdims=1
 """
-     if type(a) == N.ndarray and a.dtype in [N.int_, N.short, N.ubyte]:
+     if isinstance(a, N.ndarray) and a.dtype in [N.int_, N.short, N.ubyte]:
          a = a.astype(N.float_)
      if dimension == None:
          s = N.sum(N.ravel(a))
-     elif type(dimension) in [IntType,FloatType]:
+     elif isinstance(dimension, (int, float)):
          s = N.add.reduce(a, dimension)
          if keepdims == 1:
              shp = list(a.shape)
@@ -4191,7 +4190,7 @@
     if dimension == None:
         a = N.ravel(a)
         dimension = 0
-    if type(dimension) in [ListType, TupleType, N.ndarray]:
+    if isinstance(dimension, (list, tuple, N.ndarray)):
         dimension = list(dimension)
         dimension.sort()
         dimension.reverse()
@@ -4252,7 +4251,7 @@
         inarray = N.ravel(inarray)
         dimension = 0
     s = asum(inarray,dimension,keepdims)
-    if type(s) == N.ndarray:
+    if isinstance(s, N.ndarray):
         return s.astype(N.float_)*s
     else:
         return float(s)*s
@@ -4350,17 +4349,17 @@
  #########################################################
 
 ## CENTRAL TENDENCY:
- geometricmean = Dispatch ( (lgeometricmean, (ListType, TupleType)),
+ geometricmean = Dispatch ( (lgeometricmean, (list, tuple)),
                             (ageometricmean, (N.ndarray,)) )
- harmonicmean = Dispatch ( (lharmonicmean, (ListType, TupleType)),
+ harmonicmean = Dispatch ( (lharmonicmean, (list, tuple)),
                            (aharmonicmean, (N.ndarray,)) )
- mean = Dispatch ( (lmean, (ListType, TupleType)),
+ mean = Dispatch ( (lmean, (list, tuple)),
                    (amean, (N.ndarray,)) )
- median = Dispatch ( (lmedian, (ListType, TupleType)),
+ median = Dispatch ( (lmedian, (list, tuple)),
                      (amedian, (N.ndarray,)) )
- medianscore = Dispatch ( (lmedianscore, (ListType, TupleType)),
+ medianscore = Dispatch ( (lmedianscore, (list, tuple)),
                           (amedianscore, (N.ndarray,)) )
- mode = Dispatch ( (lmode, (ListType, TupleType)),
+ mode = Dispatch ( (lmode, (list, tuple)),
                    (amode, (N.ndarray,)) )
  tmean = Dispatch ( (atmean, (N.ndarray,)) )
  tvar = Dispatch ( (atvar, (N.ndarray,)) )
@@ -4368,151 +4367,151 @@
  tsem = Dispatch ( (atsem, (N.ndarray,)) )
 
 ## VARIATION:
- moment = Dispatch ( (lmoment, (ListType, TupleType)),
+ moment = Dispatch ( (lmoment, (list, tuple)),
                      (amoment, (N.ndarray,)) )
- variation = Dispatch ( (lvariation, (ListType, TupleType)),
+ variation = Dispatch ( (lvariation, (list, tuple)),
                         (avariation, (N.ndarray,)) )
- skew = Dispatch ( (lskew, (ListType, TupleType)),
+ skew = Dispatch ( (lskew, (list, tuple)),
                    (askew, (N.ndarray,)) )
- kurtosis = Dispatch ( (lkurtosis, (ListType, TupleType)),
+ kurtosis = Dispatch ( (lkurtosis, (list, tuple)),
                        (akurtosis, (N.ndarray,)) )
- describe = Dispatch ( (ldescribe, (ListType, TupleType)),
+ describe = Dispatch ( (ldescribe, (list, tuple)),
                        (adescribe, (N.ndarray,)) )
 
 ## DISTRIBUTION TESTS
 
- skewtest = Dispatch ( (askewtest, (ListType, TupleType)),
+ skewtest = Dispatch ( (askewtest, (list, tuple)),
                        (askewtest, (N.ndarray,)) )
- kurtosistest = Dispatch ( (akurtosistest, (ListType, TupleType)),
+ kurtosistest = Dispatch ( (akurtosistest, (list, tuple)),
                            (akurtosistest, (N.ndarray,)) )
- normaltest = Dispatch ( (anormaltest, (ListType, TupleType)),
+ normaltest = Dispatch ( (anormaltest, (list, tuple)),
                          (anormaltest, (N.ndarray,)) )
 
 ## FREQUENCY STATS:
- itemfreq = Dispatch ( (litemfreq, (ListType, TupleType)),
+ itemfreq = Dispatch ( (litemfreq, (list, tuple)),
                        (aitemfreq, (N.ndarray,)) )
- scoreatpercentile = Dispatch ( (lscoreatpercentile, (ListType, TupleType)),
+ scoreatpercentile = Dispatch ( (lscoreatpercentile, (list, tuple)),
                                 (ascoreatpercentile, (N.ndarray,)) )
- percentileofscore = Dispatch ( (lpercentileofscore, (ListType, TupleType)),
+ percentileofscore = Dispatch ( (lpercentileofscore, (list, tuple)),
                                  (apercentileofscore, (N.ndarray,)) )
- histogram = Dispatch ( (lhistogram, (ListType, TupleType)),
+ histogram = Dispatch ( (lhistogram, (list, tuple)),
                         (ahistogram, (N.ndarray,)) )
- cumfreq = Dispatch ( (lcumfreq, (ListType, TupleType)),
+ cumfreq = Dispatch ( (lcumfreq, (list, tuple)),
                       (acumfreq, (N.ndarray,)) )
- relfreq = Dispatch ( (lrelfreq, (ListType, TupleType)),
+ relfreq = Dispatch ( (lrelfreq, (list, tuple)),
                       (arelfreq, (N.ndarray,)) )
  
 ## VARIABILITY:
- obrientransform = Dispatch ( (lobrientransform, (ListType, TupleType)),
+ obrientransform = Dispatch ( (lobrientransform, (list, tuple)),
                               (aobrientransform, (N.ndarray,)) )
- samplevar = Dispatch ( (lsamplevar, (ListType, TupleType)),
+ samplevar = Dispatch ( (lsamplevar, (list, tuple)),
                         (asamplevar, (N.ndarray,)) )
- samplestdev = Dispatch ( (lsamplestdev, (ListType, TupleType)),
+ samplestdev = Dispatch ( (lsamplestdev, (list, tuple)),
                           (asamplestdev, (N.ndarray,)) )
  signaltonoise = Dispatch( (asignaltonoise, (N.ndarray,)),)
- var = Dispatch ( (lvar, (ListType, TupleType)),
+ var = Dispatch ( (lvar, (list, tuple)),
                   (avar, (N.ndarray,)) )
- stdev = Dispatch ( (lstdev, (ListType, TupleType)),
+ stdev = Dispatch ( (lstdev, (list, tuple)),
                     (astdev, (N.ndarray,)) )
- sterr = Dispatch ( (lsterr, (ListType, TupleType)),
+ sterr = Dispatch ( (lsterr, (list, tuple)),
                     (asterr, (N.ndarray,)) )
- sem = Dispatch ( (lsem, (ListType, TupleType)),
+ sem = Dispatch ( (lsem, (list, tuple)),
                   (asem, (N.ndarray,)) )
- z = Dispatch ( (lz, (ListType, TupleType)),
+ z = Dispatch ( (lz, (list, tuple)),
                 (az, (N.ndarray,)) )
- zs = Dispatch ( (lzs, (ListType, TupleType)),
+ zs = Dispatch ( (lzs, (list, tuple)),
                  (azs, (N.ndarray,)) )
  
 ## TRIMMING FCNS:
  threshold = Dispatch( (athreshold, (N.ndarray,)),)
- trimboth = Dispatch ( (ltrimboth, (ListType, TupleType)),
+ trimboth = Dispatch ( (ltrimboth, (list, tuple)),
                        (atrimboth, (N.ndarray,)) )
- trim1 = Dispatch ( (ltrim1, (ListType, TupleType)),
+ trim1 = Dispatch ( (ltrim1, (list, tuple)),
                     (atrim1, (N.ndarray,)) )
  
 ## CORRELATION FCNS:
- paired = Dispatch ( (lpaired, (ListType, TupleType)),
+ paired = Dispatch ( (lpaired, (list, tuple)),
                      (apaired, (N.ndarray,)) )
- lincc = Dispatch ( (llincc, (ListType, TupleType)),
+ lincc = Dispatch ( (llincc, (list, tuple)),
                        (alincc, (N.ndarray,)) )
- pearsonr = Dispatch ( (lpearsonr, (ListType, TupleType)),
+ pearsonr = Dispatch ( (lpearsonr, (list, tuple)),
                        (apearsonr, (N.ndarray,)) )
- spearmanr = Dispatch ( (lspearmanr, (ListType, TupleType)),
+ spearmanr = Dispatch ( (lspearmanr, (list, tuple)),
                         (aspearmanr, (N.ndarray,)) )
- pointbiserialr = Dispatch ( (lpointbiserialr, (ListType, TupleType)),
+ pointbiserialr = Dispatch ( (lpointbiserialr, (list, tuple)),
                              (apointbiserialr, (N.ndarray,)) )
- kendalltau = Dispatch ( (lkendalltau, (ListType, TupleType)),
+ kendalltau = Dispatch ( (lkendalltau, (list, tuple)),
                          (akendalltau, (N.ndarray,)) )
- linregress = Dispatch ( (llinregress, (ListType, TupleType)),
+ linregress = Dispatch ( (llinregress, (list, tuple)),
                          (alinregress, (N.ndarray,)) )
  
 ## INFERENTIAL STATS:
- ttest_1samp = Dispatch ( (lttest_1samp, (ListType, TupleType)),
+ ttest_1samp = Dispatch ( (lttest_1samp, (list, tuple)),
                           (attest_1samp, (N.ndarray,)) )
- ttest_ind = Dispatch ( (lttest_ind, (ListType, TupleType)),
+ ttest_ind = Dispatch ( (lttest_ind, (list, tuple)),
                         (attest_ind, (N.ndarray,)) )
- ttest_rel = Dispatch ( (lttest_rel, (ListType, TupleType)),
+ ttest_rel = Dispatch ( (lttest_rel, (list, tuple)),
                         (attest_rel, (N.ndarray,)) )
- chisquare = Dispatch ( (lchisquare, (ListType, TupleType)),
+ chisquare = Dispatch ( (lchisquare, (list, tuple)),
                         (achisquare, (N.ndarray,)) )
- ks_2samp = Dispatch ( (lks_2samp, (ListType, TupleType)),
+ ks_2samp = Dispatch ( (lks_2samp, (list, tuple)),
                        (aks_2samp, (N.ndarray,)) )
- mannwhitneyu = Dispatch ( (lmannwhitneyu, (ListType, TupleType)),
+ mannwhitneyu = Dispatch ( (lmannwhitneyu, (list, tuple)),
                            (amannwhitneyu, (N.ndarray,)) )
- tiecorrect = Dispatch ( (ltiecorrect, (ListType, TupleType)),
+ tiecorrect = Dispatch ( (ltiecorrect, (list, tuple)),
                          (atiecorrect, (N.ndarray,)) )
- ranksums = Dispatch ( (lranksums, (ListType, TupleType)),
+ ranksums = Dispatch ( (lranksums, (list, tuple)),
                        (aranksums, (N.ndarray,)) )
- wilcoxont = Dispatch ( (lwilcoxont, (ListType, TupleType)),
+ wilcoxont = Dispatch ( (lwilcoxont, (list, tuple)),
                         (awilcoxont, (N.ndarray,)) )
- kruskalwallish = Dispatch ( (lkruskalwallish, (ListType, TupleType)),
+ kruskalwallish = Dispatch ( (lkruskalwallish, (list, tuple)),
                              (akruskalwallish, (N.ndarray,)) )
- friedmanchisquare = Dispatch ( (lfriedmanchisquare, (ListType, TupleType)),
+ friedmanchisquare = Dispatch ( (lfriedmanchisquare, (list, tuple)),
                                 (afriedmanchisquare, (N.ndarray,)) )
  
 ## PROBABILITY CALCS:
- chisqprob = Dispatch ( (lchisqprob, (IntType, FloatType)),
+ chisqprob = Dispatch ( (lchisqprob, (int, float)),
                         (achisqprob, (N.ndarray,)) )
- zprob = Dispatch ( (lzprob, (IntType, FloatType)),
+ zprob = Dispatch ( (lzprob, (int, float)),
                     (azprob, (N.ndarray,)) )
- ksprob = Dispatch ( (lksprob, (IntType, FloatType)),
+ ksprob = Dispatch ( (lksprob, (int, float)),
                      (aksprob, (N.ndarray,)) )
- fprob = Dispatch ( (lfprob, (IntType, FloatType)),
+ fprob = Dispatch ( (lfprob, (int, float)),
                     (afprob, (N.ndarray,)) )
- betacf = Dispatch ( (lbetacf, (IntType, FloatType)),
+ betacf = Dispatch ( (lbetacf, (int, float)),
                      (abetacf, (N.ndarray,)) )
- betai = Dispatch ( (lbetai, (IntType, FloatType)),
+ betai = Dispatch ( (lbetai, (int, float)),
                     (abetai, (N.ndarray,)) )
- erfcc = Dispatch ( (lerfcc, (IntType, FloatType)),
+ erfcc = Dispatch ( (lerfcc, (int, float)),
                     (aerfcc, (N.ndarray,)) )
- gammln = Dispatch ( (lgammln, (IntType, FloatType)),
+ gammln = Dispatch ( (lgammln, (int, float)),
                      (agammln, (N.ndarray,)) )
  
 ## ANOVA FUNCTIONS:
- F_oneway = Dispatch ( (lF_oneway, (ListType, TupleType)),
+ F_oneway = Dispatch ( (lF_oneway, (list, tuple)),
                        (aF_oneway, (N.ndarray,)) )
- F_value = Dispatch ( (lF_value, (ListType, TupleType)),
+ F_value = Dispatch ( (lF_value, (list, tuple)),
                       (aF_value, (N.ndarray,)) )
 
 ## SUPPORT FUNCTIONS:
- incr = Dispatch ( (lincr, (ListType, TupleType, N.ndarray)), )
- sum = Dispatch ( (lsum, (ListType, TupleType)),
+ incr = Dispatch ( (lincr, (list, tuple, N.ndarray)), )
+ sum = Dispatch ( (lsum, (list, tuple)),
                   (asum, (N.ndarray,)) )
- cumsum = Dispatch ( (lcumsum, (ListType, TupleType)),
+ cumsum = Dispatch ( (lcumsum, (list, tuple)),
                      (acumsum, (N.ndarray,)) )
- ss = Dispatch ( (lss, (ListType, TupleType)),
+ ss = Dispatch ( (lss, (list, tuple)),
                  (ass, (N.ndarray,)) )
- summult = Dispatch ( (lsummult, (ListType, TupleType)),
+ summult = Dispatch ( (lsummult, (list, tuple)),
                       (asummult, (N.ndarray,)) )
- square_of_sums = Dispatch ( (lsquare_of_sums, (ListType, TupleType)),
+ square_of_sums = Dispatch ( (lsquare_of_sums, (list, tuple)),
                              (asquare_of_sums, (N.ndarray,)) )
- sumdiffsquared = Dispatch ( (lsumdiffsquared, (ListType, TupleType)),
+ sumdiffsquared = Dispatch ( (lsumdiffsquared, (list, tuple)),
                              (asumdiffsquared, (N.ndarray,)) )
- shellsort = Dispatch ( (lshellsort, (ListType, TupleType)),
+ shellsort = Dispatch ( (lshellsort, (list, tuple)),
                         (ashellsort, (N.ndarray,)) )
- rankdata = Dispatch ( (lrankdata, (ListType, TupleType)),
+ rankdata = Dispatch ( (lrankdata, (list, tuple)),
                        (arankdata, (N.ndarray,)) )
- findwithin = Dispatch ( (lfindwithin, (ListType, TupleType)),
+ findwithin = Dispatch ( (lfindwithin, (list, tuple)),
                          (afindwithin, (N.ndarray,)) )
 
 ######################  END OF NUMERIC FUNCTION BLOCK  #####################
Index: lnt/server/db/regression.py
===================================================================
--- lnt/server/db/regression.py
+++ lnt/server/db/regression.py
@@ -47,7 +47,7 @@
     session.add(regression)
     new_ris = []
     for fc_id in field_changes:
-        if type(fc_id) == int:
+        if isinstance(fc_id, int):
             fc = get_fieldchange(session, ts, fc_id)
         else:
             fc = fc_id
Index: lnt/server/ui/api.py
===================================================================
--- lnt/server/ui/api.py
+++ lnt/server/ui/api.py
@@ -30,10 +30,10 @@
 def with_ts(obj):
     """For Url type fields to work, the objects we return must have a test-suite
     and database attribute set, the function attempts to set them."""
-    if type(obj) == list:
+    if isinstance(obj, list):
         # For lists, set them on all elements.
         return [with_ts(x) for x in obj]
-    if type(obj) == dict:
+    if isinstance(obj, dict):
         # If already a dict, just add the fields.
         new_obj = obj
     else:
Index: lnt/server/ui/app.py
===================================================================
--- lnt/server/ui/app.py
+++ lnt/server/ui/app.py
@@ -57,7 +57,7 @@
     def default(self, obj):
         if hasattr(obj, '__json__'):
             return obj.__json__()
-        if type(obj) is datetime.datetime:
+        if isinstance(obj, datetime.datetime):
             return obj.isoformat()
         if isinstance(obj.__class__, DeclarativeMeta):
             fields = {}
Index: lnt/tests/nt.py
===================================================================
--- lnt/tests/nt.py
+++ lnt/tests/nt.py
@@ -100,7 +100,7 @@
         opts -- the command line options object
         start_time -- the time the program was invoked as a string
         """
-        assert type(opts) == dict, "Options must be a dict."
+        assert isinstance(opts, dict), "Options must be a dict."
         self.opts = opts
         self.__dict__.update(opts)
         self.start_time = start_time