ModuleNotFoundError
ModuleNotFoundError: No module named 'composio.langchain_toolset'
Stack trace
Traceback (most recent call last):
File "app.py", line 3, in <module>
from composio.langchain_toolset import ComposioTool
ModuleNotFoundError: No module named 'composio.langchain_toolset' Why it happens
This error occurs because the composio.langchain_toolset package or module is not installed in the current Python environment or the import path is incorrect. It can also happen if the package version does not include the langchain_toolset submodule.
Detection
Check your Python environment with pip list or pip show composio to confirm installation and verify the package version supports langchain_toolset before running the import.
Causes & fixes
The composio package is not installed in the current environment
Install composio using pip: run 'pip install composio' in your active environment.
Using an outdated composio version that lacks the langchain_toolset module
Upgrade composio to the latest version with 'pip install --upgrade composio' to get the langchain_toolset submodule.
Incorrect import path or typo in the import statement
Verify the import path matches the package structure exactly: 'from composio.langchain_toolset import ...' with correct spelling and casing.
Running code in a different Python environment than where composio is installed
Ensure your IDE or runtime uses the Python interpreter where composio is installed, or reinstall composio in the active environment.
Code: broken vs fixed
from composio.langchain_toolset import ComposioTool # ModuleNotFoundError here
tool = ComposioTool()
print(tool.run())import os
from composio.langchain_toolset import ComposioTool # Fixed import after installing/upgrading composio
# Ensure environment uses correct Python interpreter
tool = ComposioTool()
print(tool.run())Workaround
If you cannot install composio immediately, mock the composio.langchain_toolset module in your code with a dummy class to allow development to continue.
Prevention
Use virtual environments consistently and add composio to your requirements.txt or environment.yml to ensure the package and its modules are installed before deployment.