ModuleNotFoundError
builtins.ModuleNotFoundError
Stack trace
Traceback (most recent call last):
File "app.py", line 1, in <module>
from deepseek import ModuleNotFoundError
ModuleNotFoundError: No module named 'deepseek' Why it happens
This error occurs because the 'deepseek' package is not installed in your Python environment or the environment's PYTHONPATH does not include the directory where 'deepseek' is located. It can also happen if the package name is misspelled or the virtual environment is not activated.
Detection
Check for ModuleNotFoundError exceptions during import statements and verify installed packages with 'pip list' or 'pip show deepseek'.
Causes & fixes
The 'deepseek' package is not installed in the current Python environment.
Install the package using 'pip install deepseek-chat' or the correct DeepSeek package name.
The Python environment is not activated or the PYTHONPATH does not include the DeepSeek package location.
Activate the correct virtual environment or add the DeepSeek package directory to PYTHONPATH.
Typo or incorrect import statement referencing 'deepseek' incorrectly.
Verify the import statement matches the package's module names exactly, e.g., 'from deepseek import DeepSeekClient' instead of 'ModuleNotFoundError'.
Code: broken vs fixed
from deepseek import ModuleNotFoundError # This import causes ModuleNotFoundErrorimport os
from deepseek import DeepSeekClient # Correct import after installing package
# Set API key from environment
os.environ['DEEPSEEK_API_KEY'] = os.environ.get('DEEPSEEK_API_KEY', 'your_api_key_here')
client = DeepSeekClient(api_key=os.environ['DEEPSEEK_API_KEY'])
print('DeepSeek client initialized successfully')Workaround
If you cannot install the package immediately, mock the DeepSeek import in your code with a dummy class to allow development to continue.
Prevention
Use virtual environments consistently, verify package installation before deployment, and automate environment setup with requirements.txt or poetry.lock files.