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Simpler comprehension for record writing: (record[i] for i in fields_to_pass) #37

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Simpler comprehension for record writing: (record[i] for i in fields_to_pass) #37

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10 changes: 3 additions & 7 deletions ch05-files/e22b1_passwd_to_csv_selected.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,18 +5,14 @@
import csv


def passwd_to_csv(passwd_filename, csv_filename, fields_to_pass='1 2', delimiter='\t'):
def passwd_to_csv(passwd_filename, csv_filename, fields_to_pass='0 2', delimiter='\t'):
fields_to_pass = [int(one_item)
for one_item in fields_to_pass]
for one_item in fields_to_pass.split()]

with open(passwd_filename) as passwd, open(csv_filename, 'w') as output:
infile = csv.reader(passwd, delimiter=':')
outfile = csv.writer(output, delimiter=delimiter)
for record in infile:

if len(record) > 1:
fields = [one_field
for index, one_field in enumerate(record)
if index in fields_to_pass]

outfile.writerow(*fields)
outfile.writerow((record[i] for i in fields_to_pass))