Python - write list list of lists in columns

Question

I have a list of lists with a various number of elements (int). I want to print/write it, but in columns rather than in rows.

Example:

l = [[1,2,3],[4,5],[6,7,8,9],[0]]

Result:

Sven Marnach · Accepted Answer · 2011-02-05 19:11:25Z

14

The easiest way to do this is to use itertools.izip_longest():

for x in itertools.izip_longest(*l, fillvalue="."):
    print " ".join(str(i) for i in x)

answered Feb 5, 2011 at 19:11

Sven Marnach

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Comments

Ned Batchelder · Accepted Answer · 2011-02-05 19:13:13Z

3

This:

import itertools

l = [[1,2,3],[4,5],[6,7,8,9],[0]]

for t in itertools.izip_longest(*l):
    print "".join("%3d" % x if x is not None else "  ." for x in t)

produces:

answered Feb 5, 2011 at 19:13

Ned Batchelder

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