How to fix How to fix 'conflicting dependencies' error in pip in Python

PythonINTERMEDIATEMEDIUM

Two or more packages have incompatible version requirements. pip cannot find a version combination that satisfies all requirements simultaneously.

What this error means

When you install package A (requires B>=2.0) and package C (requires B<2.0), pip cannot find a single version of B that satisfies both constraints. This is a dependency conflict. pip fails to resolve the dependency tree.

Typical symptoms

pip install fails with dependency conflict message
Two packages require different versions of same dependency
Some packages install but one fails
Adding one more package breaks existing installation
Works with older versions of packages
Complex requirements file has conflicts
Pip can't find version that satisfies all requirements

Common causes

Specifying incompatible versions in requirements.txt
Package maintainers not updating dependencies
Using very old and very new package versions together
Transitive dependency conflicts (A->B, C->D->B different versions)
Package A and B both updated and now incompatible
Requirements file has overly restrictive version pins

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 resolver algorithm documentation(Official Docs)
💬
SO: conflicting dependencies(Stack Overflow)
🐙
GitHub: pip issues(GitHub)