How to Properly Import Functions from External Python Files?

Importing Functions from External Python Files

When working with complex codebase, it is often necessary to import functions from other Python files to avoid code duplication and maintain modularity. However, faced with the challenge of importing a function from a different file, you may encounter an "ImportError: No module named 'file.py'; file is not a package".

To resolve this issue, there are some crucial steps to follow. Firstly, ensure that both the file containing the function and the file importing it are in the same directory. Additionally, if the function to be imported is named function, the following code will import it correctly:

from file import function

Once imported, the function can be called using:

function(a, b)

It's important to note that specifying the file extension ('.py') in the import statement is not necessary. Additionally, if there is another function within the imported file named function, the above code will import that function. To avoid conflicts, consider using unique function names or implementing object-oriented programming techniques.

Remember that Python's core modules include one named 'file', so avoid using 'file.py' as a filename for your code to prevent conflicts.

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