mirror of
https://github.com/ilri/csv-metadata-quality.git
synced 2024-11-16 02:57:04 +01:00
Alan Orth
196bb434fa
I'm only concerned with validating issue dates here. In DSpace they are generally always YYYY, YYY-MM, or YYYY-MM-DD (though in theory they could be any valid ISO8601 format). This also checks for cases where the date is missing and where the metadata has specified multiple dates like "1990||1991", as this is valid, but there is no practical value for it in our system.
127 lines
2.8 KiB
Python
Executable File
127 lines
2.8 KiB
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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return field
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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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# 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 isbn.is_valid(value):
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print(f'Invalid ISBN: {value}')
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return field
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def separators(field):
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"""Check for invalid multi-value separators (ie "|" or "|||").
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Prints the field with the invalid multi-value separator.
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"""
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import re
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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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# After splitting, see if there are any remaining "|" characters
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match = re.findall(r'^.*?\|.*$', value)
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if len(match) > 0:
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print(f'Invalid multi-value separator: {field}')
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return field
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def date(field):
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"""Check if a date is valid.
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In DSpace the issue date is usually 1990, 1990-01, or 1990-01-01, but it
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could technically even include time as long as it is ISO8601.
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Also checks for other invalid cases like missing and multiple dates.
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Prints the date if invalid.
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"""
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from datetime import datetime
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if pd.isna(field):
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print(f'Missing date.')
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return
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# Try to split multi-value field on "||" separator
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multiple_dates = field.split('||')
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# We don't allow multi-value date fields
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if len(multiple_dates) > 1:
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print(f'Multiple dates not allowed: {field}')
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return field
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try:
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# Check if date is valid YYYY format
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datetime.strptime(field, '%Y')
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return field
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except ValueError:
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pass
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try:
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# Check if date is valid YYYY-MM format
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datetime.strptime(field, '%Y-%m')
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return field
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except ValueError:
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pass
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try:
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# Check if date is valid YYYY-MM-DD format
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datetime.strptime(field, '%Y-%m-%d')
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return field
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except ValueError:
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print(f'Invalid date: {field}')
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