Python – convert list of tuples to string

Question

Which is the most pythonic way to convert a list of tuples to string?

I have:

[(1,2), (3,4)]

and I want:

"(1,2), (3,4)"

My solution to this has been:

l=[(1,2),(3,4)]
s=""
for t in l:
    s += "(%s,%s)," % t
s = s[:-1]

Is there a more pythonic way to do this?

polygenelubricants · Accepted Answer · 2010-07-20T17:30:16

You can try something like this (see also on ideone.com):

myList = [(1,2),(3,4)]
print ",".join("(%s,%s)" % tup for tup in myList)
# (1,2),(3,4)

mykhal · Accepted Answer · 2010-07-20T17:34:55

you might want to use something such simple as:

>>> l = [(1,2), (3,4)]
>>> str(l).strip('[]')
'(1, 2), (3, 4)'

.. which is handy, but not guaranteed to work correctly

pillmuncher · Answer 3 · 2010-07-20T19:13:07

How about:

>>> tups = [(1, 2), (3, 4)]
>>> ', '.join(map(str, tups))
'(1, 2), (3, 4)'

ValarDohaeris · Answer 4 · 2018-06-06T18:29:08

The most pythonic solution is

tuples = [(1, 2), (3, 4)]

tuple_strings = ['(%s, %s)' % tuple for tuple in tuples]

result=", ".join(tuple_strings)

Benj · Answer 5 · 2010-07-20T17:44:39

How about

l = [(1, 2), (3, 4)]
print repr(l)[1:-1]
# (1, 2), (3, 4)

Maehler · Answer 6 · 2012-07-03T07:10:53

I think this is pretty neat:

>>> l = [(1,2), (3,4)]
>>> "".join(str(l)).strip('[]')
'(1,2), (3,4)'

Try it, it worked like a charm for me.

blaztinn · Answer 7 · 2010-08-19T20:49:57

Three more 🙂

l = [(1,2), (3,4)]

unicode(l)[1:-1]
# u'(1, 2), (3, 4)'

("%s, "*len(l) % tuple(l))[:-2]
# '(1, 2), (3, 4)'

", ".join(["%s"]*len(l)) % tuple(l)
# '(1, 2), (3, 4)'

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