cannot import name 'SourceDistribution' from 'pip._internal.distributions.source' (C:\Users\saji\Anaconda3\lib\site-packages\pip\_internal\distributions\source\__init__.py)

[sajidisl]

---

Good First Issue: This issue is a good starting point for first time contributors -- the process of fixing this should be a good introduction to pip's development workflow. If you've already contributed to pip, work on another issue without this label instead. If there is not a corresponding pull request for this issue, it is up for grabs. For directions for getting set up, see our Getting Started Guide. If you are working on this issue and have questions, feel free to ask them here, #pypa-dev on Freenode, or the pypa-dev mailing list.

[pradyunsg]

Please see #7217