Regular expressions in Python
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Regular expressions in Python

About the Book

About the Author

Gábor Szabó
Gábor Szabó

Gabor Szabo has been programming for more than 40 years in a number of languages and in various environments. He used to do DevOps before there was a name for it.

These days he usually helps companies improve their engineering practices by providing training, introducing test automation, CI, CD. Sometimes this includes building internal web sites. Gabor also loves explaining things and provides training to his clients.

He also has a number of websites. Each one using a different technology.

Gabor runs the Code Maven site and a number of its sub-site where he write about lots of different technologies such as Python, Rust, Git, Continuous Integration, etc.

Gabor has been writing Perl since 1995 and teaching it since 2000. He is the author of the Perl Maven site including the Perl Tutorial. He has taught web development with Perl Dancer many time including at Perl Conferences in Europe and USA. Gabor is the chief editor of the Perl Weekly newsletter.

Table of Contents

    • Thank you!
    • Regular Expressions in Python
    • What are Regular Expressions (aka. Regexes)?
    • What are Regular Expressions good for?
    • Examples
    • Where can I use it ?
    • grep
    • Regexes first match
    • Match numbers
    • Capture
    • Capture more
    • Capture even more
    • Named capture
    • findall
    • findall with capture
    • findall with capture more than one
    • Any Character
    • Match dot
    • Character classes
      • []
    • Common characer classes
    • Negated character class
    • Character classes summary
    • Character classes and Unicode characters
    • Character classes for Hebrew text
    • Match digits
    • Word Characters
    • Exercise: add numbers
    • Solution: add numbers
    • Solution: add numbers
    • Solution: add numbers
    • Optional character
    • Regex match 0 or more (the * quantifier)
    • Quantifiers
    • Quantifiers limit
    • Quantifiers on character classes
    • Greedy quantifiers
    • Minimal quantifiers
    • Anchors
    • Anchors with mulitline
    • Anchors on both end
    • Match ISBN numbers
    • Matching a section
    • Matching a section - minimal
    • Matching a section negated character class
    • Two regex with logical or
    • Alternatives
    • Grouping and Alternatives
    • Internal variables
    • More internal variables
    • Regex DNA
    • Regex IGNORECASE
    • DOTALL S (single line)
    • MULTILINE M
    • Combine Regex flags
    • Regex VERBOSE X
    • Substitution
    • Substitution and MULTILINE - remove leading spaces
    • findall capture
    • Fixing dates
    • Fixing dates - 1
    • Fixing dates - 2
    • Fixing dates - 3
    • Fixing dates - 4
    • Anchor edge of word
    • Double numbers
    • Remove spaces
    • Replace string in Assembly code
    • Replace string in Assembly code - using mapping dict
    • Replace string in Assembly code - using alternatives
    • Replace string in Assembly code - generate regex
    • Full example of previous
    • Split with regex
    • Exercises: Regexes part 1
    • Exercise: Regexes part 2
    • Exercise: Sort SNMP numbers
    • Exercise: parse hours log file and create report
    • Exercise: Parse ini file
    • Exercise: Replace Python
    • Exercise: Extract phone numbers
    • Solution: Sort SNMP numbers
    • Solution: parse hours log file and give report
    • Solution: Processing INI file manually
    • Solution: Processing config file
    • Solution: Extract phone numbers
    • Regular Expressions Cheat sheet
    • Fix bad JSON
    • Fix very bad JSON
    • Raw string or escape
    • Remove spaces regex
    • Regex Unicode
    • Anchors Other example

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