Regular Expressions 101

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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"\b(?:loan)\s*(?:balance|amounts?|reimbursements?|installments?)?\s*(?:of|is|\s|\:|\-)\s*(?:(?:[\$]\s*[\.,\d]+\s*(?:millions?|billions?|thousands?|[KMB])?)|(?:[\.\,\d]+\s*(?:millions?|billions?|thousands?|[KMB])?\s*(?:dollars?|\$)?)|(?:[\.\,\d]+\s*(?:\$)))|(?: [\$]\s*[\.,\d]+\s*(?:millions?|billions?|thousands?|[KMB])?)|(?:[\.\,\d]+\s*(?:millions?|billions?|thousands?|[KMB])?\s*(?:dollars?|\$ ))|(?:[\.\,\d]+\s*(?:\$ ))", flags=re.MULTILINE | re.IGNORECASE) test_str = ("loan balance is $45,56.89\n" "loan balance of $ 1M\n" "Loan Amount of 43000K\n" "loan reimbursement is 54.4 dollars\n" "loan reimbursement is 34,10.45 million\n" "loan balance of 25000$ \n" "loan amount $100,200.30\n" "Loan Amount: 100K\n" "Loan Amount $ 1.5 million \n" "loan is $54K\n" "loan balance - 50K$ \n" "----------------------------------------------------------------\n" "2.9 millions\n" " $25000.50\n" "1,99$ \n" " $25000\n" "1.10 dollar $25000\n" "1,99 dollars $23K \n" " $ 25,00\n" "1.10 dollar $25,000.50\n" "1,99 dollars $25000.50\n" "10 dollar\n" " $ 25,000\n" "1.99$ \n" "1,99$ \n" " $25000\n" "1.10 dollar $25000.50\n" "1,99 dollars\n" "10 dollar\n" " $ 25,000\n" "25,000.50$ \n" "1.99$ \n" " $25,000.50\n" "1.10 dollar $25000.50\n" "1,99 dollars $23K \n" "10 dollar $25000\n" "1.99$ \n" " $ 25,000\n" "djkb_09$kjh87\n" "gh67_($67.67P)\n\n\n\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