Regex Tester API

Regex Tester tests regular expressions against input strings across operations like match, search, replace, and split. It reports compilation validity, syntax error details, execution timing, and structural pattern analysis.

This is a Python wrapper for the Regex Tester API

Installation

Using pip:

pip install apiverve-regextester

Using pip3:

pip3 install apiverve-regextester

Configuration

Before using the Regex Tester API client, you have to setup your account and obtain your API Key. You can get it by signing up at https://apiverve.com

Quick Start

Here's a simple example to get you started quickly:

from apiverve_regextester.apiClient import RegextesterAPIClient

# Initialize the client with your APIVerve API key
api = RegextesterAPIClient("[YOUR_API_KEY]")

query = {
    "pattern": "\d{3}-\d{2}-\d{4}",
    "text": "My SSN is 123-45-6789 and my friend's is 987-65-4321",
    "flags": "g"
}

try:
    # Make the API call
    result = api.execute(query)

    # Print the result
    print(result)
except Exception as e:
    print(f"Error: {e}")

Usage

The Regex Tester API documentation is found here: https://docs.apiverve.com/ref/regextester. You can find parameters, example responses, and status codes documented here.

Setup

# Import the client module
from apiverve_regextester.apiClient import RegextesterAPIClient

# Initialize the client with your APIVerve API key
api = RegextesterAPIClient("[YOUR_API_KEY]")

Perform Request

Using the API client, you can perform requests to the API.

Define Query

query = {
    "pattern": "\d{3}-\d{2}-\d{4}",
    "text": "My SSN is 123-45-6789 and my friend's is 987-65-4321",
    "flags": "g"
}

Simple Request

# Make a request to the API
result = api.execute(query)

# Print the result
print(result)

Example Response

{
  "status": "ok",
  "error": null,
  "data": {
    "pattern": "\\d{3}-\\d{2}-\\d{4}",
    "text": "My SSN is 123-45-6789 and my friend's is 987-65-4321",
    "flags": "g",
    "test_type": "test",
    "replacement": null,
    "is_valid_regex": true,
    "regex_info": {
      "pattern": "\\d{3}-\\d{2}-\\d{4}",
      "flags": {
        "global": true,
        "ignore_case": false,
        "multiline": false,
        "sticky": false,
        "unicode": false,
        "dot_all": false
      },
      "source": "\\d{3}-\\d{2}-\\d{4}",
      "last_index": 21,
      "pattern_length": 17,
      "complexity": "Medium"
    },
    "test_results": {
      "operation": "test",
      "result": true,
      "execution_time_ms": 0,
      "description": "Returns true if pattern matches anywhere in text, false otherwise"
    },
    "performance": {
      "iterations": 192,
      "total_time_ms": 0,
      "average_time_ms": 0,
      "performance_rating": "Excellent"
    },
    "pattern_analysis": {
      "contains_anchors": {
        "start_anchor": false,
        "end_anchor": false,
        "word_boundary": false
      },
      "contains_quantifiers": {
        "zero_or_more": false,
        "one_or_more": false,
        "zero_or_one": false,
        "specific_count": true,
        "range_count": false
      },
      "contains_groups": {
        "capturing_groups": 0,
        "non_capturing_groups": 0,
        "named_groups": 0
      },
      "contains_character_classes": {
        "predefined_classes": true,
        "custom_classes": false,
        "negated_classes": false
      },
      "contains_special_chars": {
        "wildcard": false,
        "pipe": false,
        "escape_sequences": 3
      }
    },
    "suggestions": [
      "Consider anchoring with ^ or $ if you need exact matches"
    ],
    "common_patterns": [
      {
        "name": "Email Address",
        "pattern": "^[\\w\\.-]+@[\\w\\.-]+\\.[a-zA-Z]{2,}$",
        "description": "Matches valid email addresses",
        "example": "user@example.com"
      },
      {
        "name": "Phone Number (US)",
        "pattern": "^\\(?(\\d{3})\\)?[-.\\s]?(\\d{3})[-.\\s]?(\\d{4})$",
        "description": "Matches US phone numbers in various formats",
        "example": "(123) 456-7890"
      },
      {
        "name": "URL",
        "pattern": "^https?:\\/\\/(www\\.)?[-a-zA-Z0-9@:%._\\+~#=]{1,256}\\.[a-zA-Z0-9()]{1,6}\\b([-a-zA-Z0-9()@:%_\\+.~#?&//=]*)$",
        "description": "Matches HTTP and HTTPS URLs",
        "example": "https://www.example.com"
      },
      {
        "name": "IP Address (IPv4)",
        "pattern": "^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$",
        "description": "Matches valid IPv4 addresses",
        "example": "192.168.1.1"
      },
      {
        "name": "Credit Card Number",
        "pattern": "^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|3[47][0-9]{13}|3[0-9]{13}|6(?:011|5[0-9]{2})[0-9]{12})$",
        "description": "Matches major credit card formats",
        "example": "4532123456789012"
      },
      {
        "name": "Social Security Number",
        "pattern": "^\\d{3}-?\\d{2}-?\\d{4}$",
        "description": "Matches SSN with or without dashes",
        "example": "123-45-6789"
      },
      {
        "name": "Date (MM/DD/YYYY)",
        "pattern": "^(0[1-9]|1[0-2])\\/(0[1-9]|[12][0-9]|3[01])\\/(19|20)\\d{2}$",
        "description": "Matches MM/DD/YYYY date format",
        "example": "12/31/2023"
      },
      {
        "name": "Time (24-hour)",
        "pattern": "^([01]?[0-9]|2[0-3]):[0-5][0-9]$",
        "description": "Matches 24-hour time format",
        "example": "14:30"
      },
      {
        "name": "Hexadecimal Color",
        "pattern": "^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$",
        "description": "Matches hex color codes",
        "example": "#FF5733"
      },
      {
        "name": "Strong Password",
        "pattern": "^(?=.*[a-z])(?=.*[A-Z])(?=.*\\d)(?=.*[@$!%*?&])[A-Za-z\\d@$!%*?&]{8,}$",
        "description": "At least 8 chars with uppercase, lowercase, digit, and special char",
        "example": "MyP@ssw0rd"
      }
    ],
    "regex_guide": {
      "basic_syntax": [
        {
          "symbol": ".",
          "description": "Matches any single character except newline"
        },
        {
          "symbol": "*",
          "description": "Matches 0 or more of the preceding character"
        },
        {
          "symbol": "+",
          "description": "Matches 1 or more of the preceding character"
        },
        {
          "symbol": "?",
          "description": "Matches 0 or 1 of the preceding character"
        },
        {
          "symbol": "^",
          "description": "Matches start of string"
        },
        {
          "symbol": "$",
          "description": "Matches end of string"
        },
        {
          "symbol": "|",
          "description": "OR operator"
        },
        {
          "symbol": "\\",
          "description": "Escape character"
        }
      ],
      "character_classes": [
        {
          "symbol": "[abc]",
          "description": "Matches any character in the set"
        },
        {
          "symbol": "[^abc]",
          "description": "Matches any character NOT in the set"
        },
        {
          "symbol": "[a-z]",
          "description": "Matches any lowercase letter"
        },
        {
          "symbol": "[A-Z]",
          "description": "Matches any uppercase letter"
        },
        {
          "symbol": "[0-9]",
          "description": "Matches any digit"
        },
        {
          "symbol": "\\d",
          "description": "Matches any digit (equivalent to [0-9])"
        },
        {
          "symbol": "\\w",
          "description": "Matches any word character [a-zA-Z0-9_]"
        },
        {
          "symbol": "\\s",
          "description": "Matches any whitespace character"
        }
      ],
      "quantifiers": [
        {
          "symbol": "{n}",
          "description": "Matches exactly n times"
        },
        {
          "symbol": "{n,}",
          "description": "Matches n or more times"
        },
        {
          "symbol": "{n,m}",
          "description": "Matches between n and m times"
        },
        {
          "symbol": "*?",
          "description": "Non-greedy: matches 0 or more (lazy)"
        },
        {
          "symbol": "+?",
          "description": "Non-greedy: matches 1 or more (lazy)"
        },
        {
          "symbol": "??",
          "description": "Non-greedy: matches 0 or 1 (lazy)"
        }
      ],
      "groups": [
        {
          "symbol": "(abc)",
          "description": "Capturing group"
        },
        {
          "symbol": "(?:abc)",
          "description": "Non-capturing group"
        },
        {
          "symbol": "(?<name>abc)",
          "description": "Named capturing group"
        },
        {
          "symbol": "(?=abc)",
          "description": "Positive lookahead"
        },
        {
          "symbol": "(?!abc)",
          "description": "Negative lookahead"
        },
        {
          "symbol": "(?<=abc)",
          "description": "Positive lookbehind"
        },
        {
          "symbol": "(?<!abc)",
          "description": "Negative lookbehind"
        }
      ],
      "flags": [
        {
          "flag": "g",
          "description": "Global - find all matches"
        },
        {
          "flag": "i",
          "description": "Case insensitive"
        },
        {
          "flag": "m",
          "description": "Multiline - ^ and $ match line breaks"
        },
        {
          "flag": "s",
          "description": "Dot matches newline characters"
        },
        {
          "flag": "u",
          "description": "Unicode mode"
        },
        {
          "flag": "y",
          "description": "Sticky - matches from lastIndex position"
        }
      ]
    }
  }
}

Error Handling

The API client provides comprehensive error handling through the RegextesterAPIClientError exception. Here are some examples:

Basic Error Handling

from apiverve_regextester.apiClient import RegextesterAPIClient, RegextesterAPIClientError

api = RegextesterAPIClient("[YOUR_API_KEY]")

query = {
    "pattern": "\d{3}-\d{2}-\d{4}",
    "text": "My SSN is 123-45-6789 and my friend's is 987-65-4321",
    "flags": "g"
}

try:
    result = api.execute(query)
    print("Success!")
    print(result)
except RegextesterAPIClientError as e:
    print(f"API Error: {e.message}")
    if e.status_code:
        print(f"Status Code: {e.status_code}")
    if e.response:
        print(f"Response: {e.response}")

Handling Specific Error Types

from apiverve_regextester.apiClient import RegextesterAPIClient, RegextesterAPIClientError

api = RegextesterAPIClient("[YOUR_API_KEY]")

query = {
    "pattern": "\d{3}-\d{2}-\d{4}",
    "text": "My SSN is 123-45-6789 and my friend's is 987-65-4321",
    "flags": "g"
}

try:
    result = api.execute(query)

    # Check for successful response
    if result.get('status') == 'success':
        print("Request successful!")
        print(result.get('data'))
    else:
        print(f"API returned an error: {result.get('error')}")

except RegextesterAPIClientError as e:
    # Handle API client errors
    if e.status_code == 401:
        print("Unauthorized: Invalid API key")
    elif e.status_code == 429:
        print("Rate limit exceeded")
    elif e.status_code >= 500:
        print("Server error - please try again later")
    else:
        print(f"API error: {e.message}")
except Exception as e:
    # Handle unexpected errors
    print(f"Unexpected error: {str(e)}")

Using Context Manager (Recommended)

The client supports the context manager protocol for automatic resource cleanup:

from apiverve_regextester.apiClient import RegextesterAPIClient, RegextesterAPIClientError

query = {
    "pattern": "\d{3}-\d{2}-\d{4}",
    "text": "My SSN is 123-45-6789 and my friend's is 987-65-4321",
    "flags": "g"
}

# Using context manager ensures proper cleanup
with RegextesterAPIClient("[YOUR_API_KEY]") as api:
    try:
        result = api.execute(query)
        print(result)
    except RegextesterAPIClientError as e:
        print(f"Error: {e.message}")
# Session is automatically closed here

Advanced Features

Debug Mode

Enable debug logging to see detailed request and response information:

from apiverve_regextester.apiClient import RegextesterAPIClient

# Enable debug mode
api = RegextesterAPIClient("[YOUR_API_KEY]", debug=True)

query = {
    "pattern": "\d{3}-\d{2}-\d{4}",
    "text": "My SSN is 123-45-6789 and my friend's is 987-65-4321",
    "flags": "g"
}

# Debug information will be printed to console
result = api.execute(query)

Manual Session Management

If you need to manually manage the session lifecycle:

from apiverve_regextester.apiClient import RegextesterAPIClient

api = RegextesterAPIClient("[YOUR_API_KEY]")

query = {
    "pattern": "\d{3}-\d{2}-\d{4}",
    "text": "My SSN is 123-45-6789 and my friend's is 987-65-4321",
    "flags": "g"
}

try:
    result = api.execute(query)
    print(result)
finally:
    # Manually close the session when done
    api.close()

Customer Support

Need any assistance? Get in touch with Customer Support.

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Legal

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License

Licensed under the MIT License (MIT)

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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

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