diff --git a/mlir/lib/Bindings/Python/IRModules.cpp b/mlir/lib/Bindings/Python/IRModules.cpp
--- a/mlir/lib/Bindings/Python/IRModules.cpp
+++ b/mlir/lib/Bindings/Python/IRModules.cpp
@@ -123,92 +123,6 @@
 equivalent to printing the operation that produced it.
 )";
 
-//------------------------------------------------------------------------------
-// Conversion utilities.
-//------------------------------------------------------------------------------
-
-namespace {
-
-/// Accumulates into a python string from a method that accepts an
-/// MlirStringCallback.
-struct PyPrintAccumulator {
-  py::list parts;
-
-  void *getUserData() { return this; }
-
-  MlirStringCallback getCallback() {
-    return [](const char *part, intptr_t size, void *userData) {
-      PyPrintAccumulator *printAccum =
-          static_cast<PyPrintAccumulator *>(userData);
-      py::str pyPart(part, size); // Decodes as UTF-8 by default.
-      printAccum->parts.append(std::move(pyPart));
-    };
-  }
-
-  py::str join() {
-    py::str delim("", 0);
-    return delim.attr("join")(parts);
-  }
-};
-
-/// Accumulates int a python file-like object, either writing text (default)
-/// or binary.
-class PyFileAccumulator {
-public:
-  PyFileAccumulator(py::object fileObject, bool binary)
-      : pyWriteFunction(fileObject.attr("write")), binary(binary) {}
-
-  void *getUserData() { return this; }
-
-  MlirStringCallback getCallback() {
-    return [](const char *part, intptr_t size, void *userData) {
-      py::gil_scoped_acquire();
-      PyFileAccumulator *accum = static_cast<PyFileAccumulator *>(userData);
-      if (accum->binary) {
-        // Note: Still has to copy and not avoidable with this API.
-        py::bytes pyBytes(part, size);
-        accum->pyWriteFunction(pyBytes);
-      } else {
-        py::str pyStr(part, size); // Decodes as UTF-8 by default.
-        accum->pyWriteFunction(pyStr);
-      }
-    };
-  }
-
-private:
-  py::object pyWriteFunction;
-  bool binary;
-};
-
-/// Accumulates into a python string from a method that is expected to make
-/// one (no more, no less) call to the callback (asserts internally on
-/// violation).
-struct PySinglePartStringAccumulator {
-  void *getUserData() { return this; }
-
-  MlirStringCallback getCallback() {
-    return [](const char *part, intptr_t size, void *userData) {
-      PySinglePartStringAccumulator *accum =
-          static_cast<PySinglePartStringAccumulator *>(userData);
-      assert(!accum->invoked &&
-             "PySinglePartStringAccumulator called back multiple times");
-      accum->invoked = true;
-      accum->value = py::str(part, size);
-    };
-  }
-
-  py::str takeValue() {
-    assert(invoked && "PySinglePartStringAccumulator not called back");
-    return std::move(value);
-  }
-
-private:
-  py::str value;
-  bool invoked = false;
-};
-
-} // namespace
-
 //------------------------------------------------------------------------------
 // Utilities.
 //------------------------------------------------------------------------------
diff --git a/mlir/lib/Bindings/Python/PybindUtils.h b/mlir/lib/Bindings/Python/PybindUtils.h
--- a/mlir/lib/Bindings/Python/PybindUtils.h
+++ b/mlir/lib/Bindings/Python/PybindUtils.h
@@ -9,11 +9,13 @@
 #ifndef MLIR_BINDINGS_PYTHON_PYBINDUTILS_H
 #define MLIR_BINDINGS_PYTHON_PYBINDUTILS_H
 
+#include "mlir-c/Support.h"
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/Twine.h"
+
 #include <pybind11/pybind11.h>
 #include <pybind11/stl.h>
 
-#include "llvm/ADT/Optional.h"
-#include "llvm/ADT/Twine.h"
 
 namespace mlir {
 namespace python {
@@ -99,4 +101,90 @@
 } // namespace detail
 } // namespace pybind11
 
+//------------------------------------------------------------------------------
+// Conversion utilities.
+//------------------------------------------------------------------------------
+
+namespace mlir {
+
+/// Accumulates into a python string from a method that accepts an
+/// MlirStringCallback.
+struct PyPrintAccumulator {
+  pybind11::list parts;
+
+  void *getUserData() { return this; }
+
+  MlirStringCallback getCallback() {
+    return [](const char *part, intptr_t size, void *userData) {
+      PyPrintAccumulator *printAccum =
+          static_cast<PyPrintAccumulator *>(userData);
+      pybind11::str pyPart(part, size); // Decodes as UTF-8 by default.
+      printAccum->parts.append(std::move(pyPart));
+    };
+  }
+
+  pybind11::str join() {
+    pybind11::str delim("", 0);
+    return delim.attr("join")(parts);
+  }
+};
+
+/// Accumulates int a python file-like object, either writing text (default)
+/// or binary.
+class PyFileAccumulator {
+public:
+  PyFileAccumulator(pybind11::object fileObject, bool binary)
+      : pyWriteFunction(fileObject.attr("write")), binary(binary) {}
+
+  void *getUserData() { return this; }
+
+  MlirStringCallback getCallback() {
+    return [](const char *part, intptr_t size, void *userData) {
+      pybind11::gil_scoped_acquire();
+      PyFileAccumulator *accum = static_cast<PyFileAccumulator *>(userData);
+      if (accum->binary) {
+        // Note: Still has to copy and not avoidable with this API.
+        pybind11::bytes pyBytes(part, size);
+        accum->pyWriteFunction(pyBytes);
+      } else {
+        pybind11::str pyStr(part, size); // Decodes as UTF-8 by default.
+        accum->pyWriteFunction(pyStr);
+      }
+    };
+  }
+
+private:
+  pybind11::object pyWriteFunction;
+  bool binary;
+};
+
+/// Accumulates into a python string from a method that is expected to make
+/// one (no more, no less) call to the callback (asserts internally on
+/// violation).
+struct PySinglePartStringAccumulator {
+  void *getUserData() { return this; }
+
+  MlirStringCallback getCallback() {
+    return [](const char *part, intptr_t size, void *userData) {
+      PySinglePartStringAccumulator *accum =
+          static_cast<PySinglePartStringAccumulator *>(userData);
+      assert(!accum->invoked &&
+             "PySinglePartStringAccumulator called back multiple times");
+      accum->invoked = true;
+      accum->value = pybind11::str(part, size);
+    };
+  }
+
+  pybind11::str takeValue() {
+    assert(invoked && "PySinglePartStringAccumulator not called back");
+    return std::move(value);
+  }
+
+private:
+  pybind11::str value;
+  bool invoked = false;
+};
+
+} // namespace mlir
+
 #endif // MLIR_BINDINGS_PYTHON_PYBINDUTILS_H