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print out ascii tables in python using data in the form: [ ('column 0 title', 'column 1 title' ..), ('row 0, column 0 data', 'row 0, column 1 data' ...) ...]
# I needed to print out ascii tables from data in the form:
# [ ('column 0 title', 'column 1 title' ..),
# ('row 0, column 0 data', 'row 0, column 1 data' ...) ...]
#
# and surprisingly it got complicated because of variable lengths of the data.
# I googled for 'standard' ways of doing this and I found suggestions like:
# http://stackoverflow.com/questions/5909873/python-pretty-printing-ascii-tables
# ...which were a bit dated and hard to read or full scale modules like:
#
# http://pypi.python.org/pypi/texttable/
# http://pypi.python.org/pypi/text_table/
# http://pypi.python.org/pypi/asciitable/
#
# ...which were an overkill. So I decided to write my own function and am quite
# pleased with what I got ! :)
#
# Sample usage:
#
# >>> l = [ ('title 0', 'title 1', 'title 2'),
# ... ('row 0 column 0', 'row 0 column 1 which is long', 'row 0 column 2'),
# ... ('row 1 column 0', 'row 1 column 1', 'row 1 column 2')
# ... ]
# >>> print_table(l)
# title 0 | title 1 | title 2
# ---------------+------------------------------+---------------
# row 0 column 0 | row 0 column 1 which is long | row 0 column 2
# row 1 column 0 | row 1 column 1 | row 1 column 2
# >>>
def print_table(rows):
"""print_table(rows)
Prints out a table using the data in `rows`, which is assumed to be a
sequence of sequences with the 0th element being the header.
"""
# - figure out column widths
widths = [ len(max(columns, key=len)) for columns in zip(*rows) ]
# - print the header
header, data = rows[0], rows[1:]
print(
' | '.join( format(title, "%ds" % width) for width, title in zip(widths, header) )
)
# - print the separator
print( '-+-'.join( '-' * width for width in widths ) )
# - print the data
for row in data:
print(
" | ".join( format(cdata, "%ds" % width) for width, cdata in zip(widths, row) )
)
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