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Pythex: a Python regular expression editor

# pythex

A Python re module tester that runs entirely in your browser.

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# pythex

A Python re module tester that runs entirely in your browser.

Copy link to this regex

Your regular expression:

Your test string:

Python source:

>>> >>>

Show Python source

Flags

IGNORECASE MULTILINE DOTALL VERBOSE ASCII DEBUG

Mode

finditer (all) search (first) fullmatch

## Match result:

## Match captures:

Results will appear here.

## Pattern debug:

### Regular Expression Cheatsheet
▼

#### Special Characters

`\`

escape special characters

`.`

matches any character (newlines only if DOTALL)

`^`

matches beginning of string

`$`

matches end of string

`[5b-d]`

matches '5', 'b', 'c' or 'd'

`[^a-c6]`

matches any char except 'a', 'b', 'c' or '6'

`R|S`

matches regex R or S

`()`

creates a capture group

#### Quantifiers

`*`

0 or more

`+`

1 or more

`?`

0 or 1

`{m}`

exactly m occurrences

`{m,n}`

from m to n

`{m,n}?`

from m to n, as few as possible

`*?`

non-greedy

#### Special Sequences

`\A`

start of string

`\b`

word boundary

`\B`

not word boundary

`\d`

digit

`\D`

non-digit

`\s`

whitespace

`\S`

non-whitespace

`\w`

alphanumeric

`\W`

non-alphanumeric

`\Z`

end of string

#### Groups & Lookarounds

`(?i)(?m)(?s)(?x)`

sets re.X flags

`(?:...)`

non-capturing group

`(?P<n>...)`

named group

`(?#...)`

a comment

`(?=...)`

lookahead assertion

`(?!...)`

negative lookahead

`(?<=...)`

lookbehind assertion

`(?<!...)`

negative lookbehind

`(?(id)y|n)`

conditional match

Inspired by Rubular. For a complete reference, see the official `re` module documentation.

Made by Gabriel Rodríguez. Running **Python** in the browser via Pyodide.