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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
Processing...

Test String

Code Generator

Language

Generated Code

import re regex = re.compile(r"^@\w+\{.*?^\}", flags=re.DOTALL | re.MULTILINE) test_str = ("@Article{Qin:2013mta,\n" " Title = {{Practical corollaries of transverse Ward-Green-Takahashi identities}},\n" " Author = {Qin, Si-Xue and Chang, Lei and Liu, Yu-Xin and Roberts, Craig D. and Schmidt, Sebastian M.},\n" " Journal = {Phys.Lett.},\n" " Year = {2013},\n" " Pages = {384-388},\n" " Volume = {B722},\n\n" " Archiveprefix = {arXiv},\n" " Bdsk-url-1 = {http://dx.doi.org/10.1016/j.physletb.2013.04.034},\n" " Doi = {10.1016/j.physletb.2013.04.034},\n" " Eprint = {1302.3276},\n" " Primaryclass = {nucl-th},\n" " Slaccitation = {%%CITATION = ARXIV:1302.3276;%%}\n" "}\n\n" "@Article{Qin:2011xq,\n" " Title = {{Investigation of rainbow-ladder truncation for excited and exotic mesons}},\n" " Author = {Qin, Si-xue and Chang, Lei and Liu, Yu-xin and Roberts, Craig D. and Wilson, David J.},\n" " Journal = {Phys.Rev.},\n" " Year = {2012},\n" " Pages = {035202},\n" " Volume = {C85},\n\n" " Archiveprefix = {arXiv},\n" " Bdsk-url-1 = {http://dx.doi.org/10.1103/PhysRevC.85.035202},\n" " Doi = {10.1103/PhysRevC.85.035202},\n" " Eprint = {1109.3459},\n" " Primaryclass = {nucl-th},\n" " Slaccitation = {%%CITATION = ARXIV:1109.3459;%%}\n" "}\n\n" "@Article{Qin:2011dd,\n" " Title = {{Interaction model for the gap equation}},\n" " Author = {Qin, Si-xue and Chang, Lei and Liu, Yu-xin and Roberts, Craig D. and Wilson, David J.},\n" " Journal = {Phys.Rev.},\n" " Year = {2011},\n" " Pages = {042202},\n" " Volume = {C84},\n\n" " Archiveprefix = {arXiv},\n" " Bdsk-url-1 = {http://dx.doi.org/10.1103/PhysRevC.84.042202},\n" " Doi = {10.1103/PhysRevC.84.042202},\n" " Eprint = {1108.0603},\n" " Primaryclass = {nucl-th},\n" " Slaccitation = {%%CITATION = ARXIV:1108.0603;%%}\n" "}\n\n" "@Article{Qin:2013ufa,\n" " Title = {{Quark Spectral Function and Deconfinement at Nonzero Temperature}},\n" " Author = {Qin, Si-xue and Rischke, Dirk H.},\n" " Journal = {Phys.Rev.},\n" " Year = {2013},\n" " Pages = {056007},\n" " Volume = {D88},\n\n" " Archiveprefix = {arXiv},\n" " Bdsk-url-1 = {http://dx.doi.org/10.1103/PhysRevD.88.056007},\n" " Doi = {10.1103/PhysRevD.88.056007},\n" " Eprint = {1304.6547},\n" " Primaryclass = {nucl-th},\n" " Slaccitation = {%%CITATION = ARXIV:1304.6547;%%}\n" "}") matches = regex.finditer(test_str) for match_num, match in enumerate(matches, start=1): print(f"Match {match_num} was found at {match.start()}-{match.end()}: {match.group()}") for group_num, group in enumerate(match.groups(), start=1): print(f"Group {group_num} found at {match.start(group_num)}-{match.end(group_num)}: {group}")

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html