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Feb 19
2010

Join a list of integers in Python

Today, I had to pretty print a list of integers for debugging. This does not work:

>>> t = [1, 2, 3, 4]
>>> ' '.join(t)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: sequence item 0: expected string, int found

So I came up with this:

>>> def concat(x, y): return str(x) + ' ' + str(y)
>>> reduce(concat, t)
'1 2 3 4'

I am sure there is a better way of doing this!

One Response (rss) (trackback)

#1

Alexa.3emyh

February 24th, 2010 at 8:33 pm

without def any function:
>>> t=[1,2,3,4]
>>> ‘ ‘.join([str(y) for y in t])

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19

Join a list of integers in Python

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