gap-mapper 0.2.0

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gap-mapper

A simple Python utility to find a "gapped" or "sparse" string within a text and return its original offsets.

This is useful when you need to find a string that has had extra, arbitrary spaces inserted into it.

Installation

Install the package from PyPI:

pip install gap-mapper

Usage

The main function is gapmap().

It takes an original_text (the haystack) and a spaced_needle (the gapped string to find). It finds the needle (ignoring its spaces) within the original text (also ignoring its spaces) and returns the correct (start, end) offsets of the match in the original text.

import gap_mapper

# The full text to search within
haystack = "Hello, world! This is the main text."

# The string to find, which has extra, inconsistent spaces
needle = "w   o r l   d"

# Find the offsets
offsets = gap_mapper.gapmap(haystack, needle)

if offsets:
    print(f"Match found at offsets: {offsets}")
    
    start, end = offsets
    print(f"Matched string: '{haystack[start:end]}'")
else:
    print("No match found.")

Match found at offsets: (7, 12) Matched string: 'world'

As you can see, gapmap correctly located "world" in the haystack and returned its true offsets (7, 12), even though the needle was "w o r l d".