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22 lines
487 B
Python
22 lines
487 B
Python
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#!/usr/bin/python3
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def parse_fwr (string, widths, start=0):
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"""Parse a fixed-width record.
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string: the string to parse.
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widths: a list of record widths. A negative width denotes a field to be skipped.
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start: optional start index.
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Returns a list of strings.
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"""
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results = []
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current_index = start
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for width in widths:
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if width > 0:
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results.append(string[current_index : current_index + width])
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current_index += width
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else:
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current_index -= width
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return results
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