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
No Match

/
/
gm

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

# coding=utf8 # the above tag defines encoding for this document and is for Python 2.x compatibility import re regex = r"^(?=\S.+\nCoverage\sLevel)|^(?=\S.+\nNon-Covered\s)" test_str = ("Out of Pocket (Stop Loss)\n" "Coverage Level: Individual\n" "Service Type: Health Benefit Plan Coverage\n" "Insurance Type Code: HM Health Maintenance Organization (HMO)\n" "Time Period Qualifier: Calendar Year\n" "Amount: $8,500.00\n" "In Plan Network Indicator: Unknown\n" "Deductible\n" "Coverage Level: Individual\n" "Service Type: Vision (Optometry)\n" "https://luna.ema.md/ema/patient/InsuranceOverviewForm.action?pic1.0u85-w2bBh0R86_K9v71KolpMN1sZmZ0Lxolu1TW4qD3al-JJFDVNX81... 13/172/21/22, 10:26 AM Luna Dermatology: Patient Insurance\n" "Insurance Type Code: HM Health Maintenance Organization (HMO)\n" "Plan Coverage Description: Fidelis Care Silver\n" "Amount: $0.00\n" "Authorization/Certification Req'd: No\n" "In Plan Network Indicator: no\n" "Co-Payment\n" "Coverage Level: Individual\n" "Service Type: Vision (Optometry)\n" "Insurance Type Code: HM Health Maintenance Organization (HMO)\n" "Plan Coverage Description: Fidelis Care Silver\n" "Amount: $0.00\n" "Authorization/Certification Req'd: No\n" "In Plan Network Indicator: Yes\n" "Co-Insurance\n" "Coverage Level: Individual\n" "Service Type: Vision (Optometry)\n" "Insurance Type Code: HM Health Maintenance Organization (HMO)\n" "Plan Coverage Description: Fidelis Care Silver\n" "Authorization/Certification Req'd: No\n" "In Plan Network Indicator: Unknown\n\n" "Out of Pocket (Stop Loss)\n" "Coverage Level: Family\n" "Service Type: Health Benefit Plan Coverage\n" "Insurance Type Code: HM Health Maintenance Organization (HMO)\n" "Time Period Qualifier: Remaining\n" "Amount: $16,190.82\n" "In Plan Network Indicator: Unknown\n" "Non-Covered\n" "Coverage Level: Individual\n" "Service Type: Medical Care\n" "Insurance Type Code: HM Health Maintenance Organization (HMO)\n" "Plan Coverage Description: Fidelis Care Silver\n" "In Plan Network Indicator: No\n" "Message: Medical Care\n" "Non-Covered\n" "Coverage Level: Individual\n" "Service Type: Durable Medical Equipment Purchase\n" "Insurance Type Code: HM Health Maintenance Organization (HMO)\n" "Plan Coverage Description: Fidelis Care Silver\n" "In Plan Network Indicator: No\n" "Message: DME Purchase") subst = "\\n" # You can manually specify the number of replacements by changing the 4th argument result = re.sub(regex, subst, test_str, 0, re.MULTILINE) if result: print (result) # Note: for Python 2.7 compatibility, use ur"" to prefix the regex and u"" to prefix the test string and substitution.

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