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Add option to truncate long columns with an additional option for csvlook (fixes #389) #482

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Add option to truncate long columns with an additional option for csvlook (fixes #389) #482

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17f8dac
Included the option --cutoff for csvlook, which allows to specify the…
Tabea-K Apr 20, 2015
5e7c92f
added "-c" shorthand for cutoff parameter
Tabea-K Oct 12, 2015
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15 changes: 12 additions & 3 deletions csvkit/utilities/csvlook.py
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,8 @@ class CSVLook(CSVKitUtility):
description = 'Render a CSV file in the console as a fixed-width table.'

def add_arguments(self):
pass
self.argparser.add_argument('-c', '--cutoff', type=int, dest='cutoff',
help='Cut off all columns after this number of characters. Intended to improve readability for CSV files with very long text in columns.')

def main(self):
rows = CSVKitReader(self.input_file, **self.reader_kwargs)
Expand Down Expand Up @@ -48,9 +49,15 @@ def main(self):
for i, v in enumerate(row):
try:
if len(v) > widths[i]:
widths[i] = len(v)
if self.args.cutoff:
widths[i] = min(len(v), self.args.cutoff)
else:
widths[i] = len(v)
except IndexError:
widths.append(len(v))
if self.args.cutoff:
widths.append(min(len(v), self.args.cutoff))
else:
widths.append(len(v))

# Dashes span each width with '+' character at intersection of
# horizontal and vertical dividers.
Expand All @@ -64,6 +71,8 @@ def main(self):
for j, d in enumerate(row):
if d is None:
d = ''
if self.args.cutoff:
d = d[0:self.args.cutoff]
output.append(' %s ' % six.text_type(d).ljust(widths[j]))

self.output_file.write('| %s |\n' % ('|'.join(output)))
Expand Down