Create speed_conversions.py (#7128)
Create speed_conversions.py (#7128)

* Update README.md

Added Google Cirq references

* Create barcode_validator.py

Barcode/EAN validator

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Included docset and updated bugs

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Implemented the changes asked in review.

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Updated with f-string format

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* Update volume_conversions.py

Simpler doctest output

* Create speed_conversions.py

Conversion of speed units

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* Update speed_conversions.py

Doctests updated, dictionary implemented.

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Reduced LOC

* Update volume_conversions.py

Co-authored-by: pre-commit-ci[bot] <3ea08453efb076ca910552532a53973a6527df40@users.noreply.github.com>
Co-authored-by: Christian Clauss <585dd401264c1e46d17ebec1862e5d2a9b6a6c5d@me.com>
TheAlgorithms/Python