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https://github.com/miladsade96/regex_nutshell

Python Regex In a Nutshell
https://github.com/miladsade96/regex_nutshell

python python3 regex regex-match regex-pattern

Last synced: 8 months ago
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Python Regex In a Nutshell

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## Python Regex In a Nutshell



### Author:

Milad Sadeghi DM - [EverLookneverSee@GitHub](https://elns.info)



### General Examples:

* Example 1: find 'abc' --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/bc9cf8bcd09c002b0795649632cc2e4b5e5d65b8/general.py#L36-L46)

* Example 2: find 'abc' - Ignoring case sensitivity --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/bc9cf8bcd09c002b0795649632cc2e4b5e5d65b8/general.py#L48-L56)

* Example 3: find '.' --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/bc9cf8bcd09c002b0795649632cc2e4b5e5d65b8/general.py#L59-L67)

* Example 4: find 'elns.info' url --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/bc9cf8bcd09c002b0795649632cc2e4b5e5d65b8/general.py#L70-L78)

* Example 5: '.' --> Any character except new line --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/bc9cf8bcd09c002b0795649632cc2e4b5e5d65b8/general.py#L81-L89)

* Example 6: \d --> Digit (0-9) --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/bc9cf8bcd09c002b0795649632cc2e4b5e5d65b8/general.py#L92-L100)

* Example 7: \D --> Non-Digit (0-9) --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/bc9cf8bcd09c002b0795649632cc2e4b5e5d65b8/general.py#L103-L111)

* Example 8: \w --> Word character (a-z) (A-Z) (0-9) _ --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/bc9cf8bcd09c002b0795649632cc2e4b5e5d65b8/general.py#L114-L122)

* Example 9: \W --> Non-Word character --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/bc9cf8bcd09c002b0795649632cc2e4b5e5d65b8/general.py#L125-L133)

* Example 10: \s --> Whitespace character (space, tab, newline) --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/bc9cf8bcd09c002b0795649632cc2e4b5e5d65b8/general.py#L136-L144)

* Example 11: \S --> Non-Whitespace character --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/bc9cf8bcd09c002b0795649632cc2e4b5e5d65b8/general.py#L147-L155)

* Example 12: \b --> Word boundary --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/e346aacce8593da21630351bb0fcd2e1f923b2ee/general.py#L161-L176)

* Example 13: \B --> Non-Word boundary --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/e346aacce8593da21630351bb0fcd2e1f923b2ee/general.py#L179-L187)

* Example 14: ^ --> Beginning of a string --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/e346aacce8593da21630351bb0fcd2e1f923b2ee/general.py#L190-L198)

* Example 15: $ --> End of a string --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/e346aacce8593da21630351bb0fcd2e1f923b2ee/general.py#L201-L209)

* Example 16: \d\d\d.\d\d\d.\d\d\d\d --> Finding phone numbers --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/e346aacce8593da21630351bb0fcd2e1f923b2ee/general.py#L212-L220)

* Example 17: \d\d\d[-.]\d\d\d[-.]\d\d\d\d --> Finding phone numbers using character set-1 --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/e346aacce8593da21630351bb0fcd2e1f923b2ee/general.py#L223-L231)

* Example 18: [89]00[-.]\d\d\d[-.]\d\d\d\d --> Finding phone numbers using character set-2 --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/e346aacce8593da21630351bb0fcd2e1f923b2ee/general.py#L234-L243)

* Example 19: [1-5] --> Finding all digits between 1 and 5 --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/5d9329631d77e1701098640d79d843cfb7ea8d0a/general.py#L251-L259)

* Example 20: [a-z] --> Finding all lowercase letters --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/5d9329631d77e1701098640d79d843cfb7ea8d0a/general.py#L262-L270)

* Example 21: [A-Z] --> Finding all uppercase letters --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/5d9329631d77e1701098640d79d843cfb7ea8d0a/general.py#L273-L281)

* Example 22: [a-zA-Z] --> Finding all letters --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/5d9329631d77e1701098640d79d843cfb7ea8d0a/general.py#L284-L292)

* Example 23: [^a-zA-Z] --> Finding all non-letters --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/5d9329631d77e1701098640d79d843cfb7ea8d0a/general.py#L295-L303)

* Example 24: [^b]at --> Finding cat mat pat except bat --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/5d9329631d77e1701098640d79d843cfb7ea8d0a/general.py#L306-L314)

* Example 25: \d{3}.\d{3}.\d{4} --> Finding phone numbers using quantifiers --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/5d9329631d77e1701098640d79d843cfb7ea8d0a/general.py#L317-L333)

* Example 26: Mr\.?\s[A-Z]\w* --> Finding all Mr and following names --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/5d9329631d77e1701098640d79d843cfb7ea8d0a/general.py#L336-L344)

* Example 27 - v1: M(r|s|rs)\.?\s[A-Z]\w* --> Finding all Mr,Ms, Mrs and following names using grouping feature --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/716bed781e4dd3572e99311fd952ba882d4ef6f3/general.py#L351-L359)

* Example 27 - v2: (Mr|Ms|Mrs)\.?\s[A-Z]\w* --> Finding all Mr,Ms, Mrs and following names using grouping feature --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/716bed781e4dd3572e99311fd952ba882d4ef6f3/general.py#L362-L370)

* Example 28: [a-zA-Z0-9.-]+@[a-zA-Z-]+\.(com|net|edu) --> Fining all email addresses that are located in text --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/716bed781e4dd3572e99311fd952ba882d4ef6f3/general.py#L373-L381)

* Example 29: https?://(www\.)?(\w+)(\.\w+) --> Finding all web addresses --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/e5bd37a57da3623b9372556dd33a3fc120351f59/general.py#L396-L404)

* Example 30: https?://(www\.)?(\w+)(\.\w+) --> Finding all web addresses and capturing information using groups--> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/e5bd37a57da3623b9372556dd33a3fc120351f59/general.py#L407-L416)

* Example 31: Reformatting the text using substitution --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/e5bd37a57da3623b9372556dd33a3fc120351f59/general.py#L419-L424)

* Example 32: Using findall to find all urls in text --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/e5bd37a57da3623b9372556dd33a3fc120351f59/general.py#L427-L433)

* Example 33: Using group in findall method --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/e5bd37a57da3623b9372556dd33a3fc120351f59/general.py#L436-L442)

* Example 34: Using match method in order to match the beginning of the string --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/e5bd37a57da3623b9372556dd33a3fc120351f59/general.py#L445-L450)

* Example 35: Using search method in order to search entire of the string --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/e5bd37a57da3623b9372556dd33a3fc120351f59/general.py#L453-L458)

* Example 36: Using ignore case flag --> [view source code](https://github.com/EverLookNeverSee/regex_nutshell/blob/e5bd37a57da3623b9372556dd33a3fc120351f59/general.py#L461-L466)