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Can you define aliases for imported modules in Python?

import a_ridiculously_long_module_name as short_name also works for import module.submodule.subsubmodule as short_name

Python: is the current directory automatically included in path?

Python adds the directory where the initial script resides as first item to sys.path: As initialized upon program startup, the first item of this list, path[0], is the directory containing the script that was used to invoke the Python interpreter. If the script directory is not available (e.g. if the interpreter is invoked interactively or … Read more

How to test or mock “if name == ‘main'” contents

I will choose another alternative which is to exclude the if __name__ == ‘__main__’ from the coverage report , of course you can do that only if you already have a test case for your main() function in your tests. As for why I choose to exclude rather than writing a new test case for … Read more

How to solve import error for pandas?

I was having the same problem now with Python 3.4.3. I was using pandas-0.18.0. Upgrading (using pip) solved the issue for me: [sudo] pip install –upgrade pandas The final result of the upgrade: Successfully installed numpy-1.13.3 pandas-0.21.0 python-dateutil-2.6.1 pytz-2017.3 six-1.11.0 After this, the issue was gone!

Reading a file using a relative path in a Python project

Relative paths are relative to current working directory. If you do not want your path to be relative, it must be absolute. But there is an often used trick to build an absolute path from current script: use its __file__ special attribute: from pathlib import Path path = Path(__file__).parent / “../data/test.csv” with path.open() as f: … Read more

Importing modules in Python – best practice

Disadvantage of each form When reading other people’s code (and those people use very different importing styles), I noticed the following problems with each of the styles: import modulewithaverylongname will clutter the code further down with the long module name (e.g. concurrent.futures or django.contrib.auth.backends) and decrease readability in those places. from module import * gives … Read more

Check if Python Package is installed

If you mean a python script, just do something like this: Python 3.3+ use sys.modules and find_spec: import importlib.util import sys # For illustrative purposes. name=”itertools” if name in sys.modules: print(f”{name!r} already in sys.modules”) elif (spec := importlib.util.find_spec(name)) is not None: # If you choose to perform the actual import … module = importlib.util.module_from_spec(spec) sys.modules[name] … Read more

Pillow installed, but getting “no module named pillow” when importing

Try using import PIL or from PIL import … instead. Pillow is a fork of PIL, the Python Imaging Library, which is no longer maintained. However, to maintain backwards compatibility, the old module name is used.

ImportError when importing certain modules from SciPY

This problem can be solved if instead of installing the usual numpy distribution, the numpy-MKL package is installed. This package is available here. Do remove the previous installation before going with the new one!

‘Import “Path.to.own.script” could not be resolved Pylance (reportMissingImports)’ in VS Code using Python 3.x on Ubuntu 20.04 LTS

Pylance, by default, includes the root path of your workspace. If you want to include other subdirectories as import resolution paths, you can add them using the python.analysis.extraPaths setting for the workspace. In VS Code press <ctrl> + <,> to open Settings. Type in python.analysis.extraPaths Select “Add Item” Type in the path to your library … Read more