Python unittest no module named

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Python Unittest: No Module Named

When encountering the error message “No module named ‘module_name'”, it typically means that the Python script being executed is unable to find the specified module. This can occur for a few reasons:

  1. The module is not installed
  2. The module is not located in the current working directory
  3. The module is not on the Python module search path

1. Module Not Installed

In this case, you need to install the missing module using the Python package manager, typically pip.

pip install module_name

2. Module Not in Current Working Directory

If the module is located in a different directory than the script being executed, you need to provide the full path to the module or move the module to the current working directory.

import sys
sys.path.append('/path/to/module_directory')

3. Module Not on Python Module Search Path

If the module is installed but not found on the Python module search path, you can add the module directory to the search path explicitly.

import sys
sys.path.append('/path/to/module_directory')

Example:

Let’s assume we have a module called ‘my_module’ and a test file ‘test_my_module.py’ in the same directory:

project_folder/
├── my_module.py
└── test_my_module.py

If we encounter the “No module named ‘my_module'” error in our test file, we can add the module directory to the Python path:

import sys
sys.path.append('/path/to/project_folder')

Now, we can import the module in our test file:

import my_module

Remember to replace ‘/path/to/project_folder’ with the actual path to your project folder.

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