How to fix How to fix 'installed different version than requested' in pip in Python

PythonINTERMEDIATEMEDIUM

pip installed a different version of a package than you requested. This usually happens due to version constraints or conflicts that force using an alternative version.

What this error means

When multiple packages have conflicting version requirements for the same dependency, pip must choose a version that works for all. Sometimes this means installing a version that isn't your first choice, but which satisfies all constraints.

Typical symptoms

pip installs version X when you requested Y
pip explains why different version was chosen
Downgrading one package upgrades another
requirements.txt specifies version but different installed
pip shows resolution explanation
Happens with complex dependency trees
Works but not with desired versions

Common causes

Version constraint forces use of different version
Transitive dependencies require older version
Package yanked from PyPI forces fallback
Python version requires older package version
Another package pins conflicting version
Pip's resolver chooses optimal version that's not first choice

How to fix this error

1Verify the root cause

Review the error message above and identify which cause applies to your situation. Run additional diagnostics if needed.

2Apply the appropriate fix

Follow the corresponding solution from the causes section above.

3Retry the installation

Once you've addressed the root cause, try running 'pip install' again.

Related errors

Official resources & further reading

📚Python Official Documentation
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pip install documentation(Official Docs)
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SO: installed different version than requested(Stack Overflow)
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GitHub: pip issues(GitHub)