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43 lines
996 B
Python
Executable File
43 lines
996 B
Python
Executable File
import pandas as pd
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def issn(field):
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"""Check if an ISSN is valid.
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Prints the ISSN if invalid.
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stdnum's is_valid() function never raises an exception.
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See: https://arthurdejong.org/python-stdnum/doc/1.11/index.html#stdnum.module.is_valid
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"""
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from stdnum import issn
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# Skip fields with missing values
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if pd.isna(field):
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return
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# Try to split multi-value field on "||" separator
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for value in field.split('||'):
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if not issn.is_valid(value):
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print(f'Invalid ISSN: {value}')
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def isbn(field):
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"""Check if an ISBN is valid.
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Prints the ISBN if invalid.
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stdnum's is_valid() function never raises an exception.
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See: https://arthurdejong.org/python-stdnum/doc/1.11/index.html#stdnum.module.is_valid
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"""
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from stdnum import isbn
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# Try to split multi-value field on "||" separator
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for value in field.split('||'):
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if not isbn.is_valid(value):
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print(f'Invalid ISBN: {value}')
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