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Add ISSN and ISBN checks using python-stdnum

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This commit is contained in:
Alan Orth 2019-07-26 23:14:10 +03:00
parent 30a4b0005f
commit e160b17fb0
Signed by: alanorth
GPG Key ID: 0FB860CC9C45B1B9
4 changed files with 76 additions and 25 deletions
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1
Pipfile
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@ -7,6 +7,7 @@ verify_ssl = true
[packages]
pandas = "*"
python-stdnum = "*"
[requires]
python_version = "3.7"

51
Pipfile.lock generated
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@ -1,7 +1,7 @@
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@ -18,31 +18,24 @@
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@ -71,6 +64,14 @@
],
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7
csv_metadata_quality/app.py
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@ -1,3 +1,4 @@
import csv_metadata_quality.check as check
import csv_metadata_quality.fix as fix
import pandas as pd
@ -13,5 +14,11 @@ def run():
df[column] = df[column].apply(fix.whitespace)
if column == 'dc.identifier.issn':
df[column] = df[column].apply(check.issn)
if column == 'dc.identifier.isbn':
df[column] = df[column].apply(check.isbn)
# Write
df.to_csv('/tmp/omg.fixed.csv', index=False)

42
csv_metadata_quality/check.py Executable file
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@ -0,0 +1,42 @@
import pandas as pd
def issn(field):
"""Check if an ISSN is valid.
Prints the ISSN if invalid.
stdnum's is_valid() function never raises an exception.
See: https://arthurdejong.org/python-stdnum/doc/1.11/index.html#stdnum.module.is_valid
"""
from stdnum import issn
# Skip fields with missing values
if pd.isna(field):
return
# Try to split multi-value field on "||" separator
for value in field.split('||'):
if not issn.is_valid(value):
print(f'Invalid ISSN: {value}')
def isbn(field):
"""Check if an ISBN is valid.
Prints the ISBN if invalid.
stdnum's is_valid() function never raises an exception.
See: https://arthurdejong.org/python-stdnum/doc/1.11/index.html#stdnum.module.is_valid
"""
from stdnum import isbn
# Try to split multi-value field on "||" separator
for value in field.split('||'):
if not isbn.is_valid(value):
print(f'Invalid ISBN: {value}')