PyCharm provides integration with the major means of requirements management and makes it possible to track the unsatisfied requirements in your projects and create a virtual environment based on the requirements.txt file .
From the Sync Python Requirements.menu, select
In the opened dialog, specify the name of the requirements file. The recommended name for the requirements file is requirements.txt. When a file with this name is added to the root project directory, it is automatically detected by Python Integrated tools.
Select the method of handling versions of the required libraries. The version numbers can be defined:
Greater or equal
Define the requirements management policy:
Remove unused requirements
Deletes records that correspond to unused libraries and packages.
Modify base files
Allows modifications in the base requirements files (if any is referenced in the requirements.txt file).
Keep existing version specifier if it matches the current version
Leaves the version number unchanged if it satisfied the selected method versions handling.
Click OK and inspect the generated file.
You can also run
pip freeze > requirements.txt in the command line to generate a requirements.txt file for your project. See https://pip.pypa.io/en/stable/reference/pip_freeze/ for more details.
If the name of the requirements file differs from requirements.txt or when you have several requirements files in one project, you have to notify PyCharm about the requirements file you want to apply.
Configure the default requirements file
Press Ctrl+Alt+S to open the IDE settings and select Tools | Python Integrated Tools.
In the Package requirements file field, type the name of the requirements file or click the browse button and locate the desired file.
Click OK to save the changes.
Though you can always run the Sync Python Requirements to update the requirements file, PyCharm provides quick fixes that enable populating this file.
Update a requirements file
importstatement of a Python file, click a package which is not yet imported. PyCharm suggests a quick-fix:
Select and apply the suggested quick-fix. The package is added to the dependency management file.
PyCharm provides quick fixes and notifications related to the unsatisfied dependencies.
Install the required packages
Open a project with the requirements file specified, a notification bar is displayed on top of any Python or requirements file opened in Editor:
Click one of the provided links to satisfy or ignore requirements.
If you have selected the Ignore option, you can always change your mind, and remove the package from the list of the ignored packages.
Add the ignored dependencies
Press Ctrl+Alt+S to open project Settings/Preferences.
In the list of the inspections, select Unsatisfied package requirements.
Preview the list of the ignored requirements and click the Add icon () to add them.