Remove unwanted parts from strings in a column of dataframe

Remove Unwanted Parts from Strings in a Column of Dataframe
- Python Automation and Machine Learning for ICs -
- An Online Book -

Python Automation and Machine Learning for ICs http://www.globalsino.com/ICs/

Chapter/Index: Introduction | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Appendix

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Removed unwanted non-number characters, and then convert the strings to integers . Code:
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       Output:

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Removed the characters which are not in date format. Code:
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       Output:

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Remove the date in strings. Code:
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       Output:

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[^\w\s] is used to match any non-alphanumeric and non-whitespace characters, and they are replaced with an empty string. Code:
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       Output:

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