Python Error: ‘module ‘win32com.gen_pyxxxx’ has no attribute ‘CLSIDToClassMap’ Solution

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While running Python applications, you get an error such as module ‘win32com.gen_py.xxxx has no attribute ‘CLSIDToClassMap’. This error occurs when there is some issue with the win32com library in Python.

This kind of error occurs when the cache for the gen_py directory gets corrupted. To resolve this issue, you can try below given steps:

Step 1: Delete the gen_py Cache:

You need to delete gen_py Cache folder, which is usually located in below location of your system.

gen_py Cache Folder Location:

C:\Users\<YourUsername>\AppData\Local\Temp\gen_py

Navigate to the gen_py directory, delete the entire gen_py folder.

Restart your Python script.

Step 2: Rebuild the Cache:

Once you have deleted the gen_gy folder, you can force Python to rebuild the cache by running your script again. This should regenerate the necessary files. If the issue persists, you need to try Step 3.

Step 3: Use Dynamic Dispatch of gencache:

Execute the below given code snippet. It will dynamically dispatch gen_py to your system.

from win32com.client import gencache 
import os
#Force generate gen_py
try: 
   gencache.EnsureDispatch("Excel.Application") # Replace with the CDM object you use 
   print("gen_py should now be created.")
except Exception as e:
   print(f"Error generating gen_py: {e}")

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