What is the version for the Python in ArcGIS 10.1 and what is the build ? My laptop does not show having pythonwin in the folder under


Is there something I need to re install or install the latest version or build for that software ?


With ArcGIS 10.1, the Python Win 32 extension is not included within the software installation exactable.

Note: The PythonWin32 extension setup requires an existing installation of Python 2.7 which is installed after installing ArcGIS Desktop, ArcGIS Engine and ArcGIS Server setups.

ArcGIS no longer installs PythonWin because the recommended methodology for creating the geoprocessor has changed to using a new Python module that ESRI has developed to support the latest version of Python and multiple platforms, such as Windows, UNIX and Linux.

Here are the instructions for PythonWin installation:

  1. Make sure you have ArcGIS Desktop 10.1 installed
  2. Open up ArcCatalog 10.1

Next, you need to know what version of PythonWin to install, 32 or 64 bit. To check this, we will run a quick python script (your first python script!).

  1. Click on the Python icon and type in these two statements

    Import sys

  2. Then, click the return button on your keyboard.

  3. Next type in:


  4. Then, click the return button on your keyboard.

You should now see a print out on your screen showing your computer operating system processor (32 or 64 bit)

Next, download the PythonWin executable.

  1. Got to:


  2. Click on the latest build parent folder (Build 219)

  3. Depending on your computer operating system being 32 or 64 bit download either:




  1. Run and install the .exe
  2. Take all default installation paths
  3. After installation has finished running successfully, within your windows explorer browse to:


Folder and double click on the Pythonwin.exe to open the software

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