CODEWITHSUNDEEP
pythonlisttuples
lawless
lawless

Reputation: 191

Format and print list of tuples as one line

I have a list containing tuples that is generated from a database query and it looks something like this. 

[(item1, value1), (item2, value2), (item3, value3),...]

The tuple will be mixed length and when I print the output it will look like this.

item1=value1, item2=value2, item3=value3,...

I have looked for a while to try to find a solution and none of the .join() solutions I have found work for this type of situation.

Upvotes: 7

Views: 12196

Answers (6)

Ati
Ati

Reputation: 191

One possible solution is this, definitely the shortest code

>>> a = [('val', 1), ('val2', 2), ('val3', 3)]
>>>', '.join('%s=%s' % v for v in a)
'val=1, val2=2, val3=3'

works with python 2.7 as well

Upvotes: 1

FastTurtle
FastTurtle

Reputation: 2311

If each tuple is only an (item, value) pair then this should work:

l = [(item1, value1), (item2, value2), (item3, value3), ...]
', '.join('='.join(t) for t in l)
'item1=value1, item2=value2, item3=value3, ...'

Upvotes: 3

Phillip Cloud
Phillip Cloud

Reputation: 25662

You can use itertools as well

from itertools import starmap
', '.join(starmap('{}={}'.format, a))

Upvotes: 3

user2534732
user2534732

Reputation:

If you want something like that, I would use a dictionary.

dict = {1:2,3:4}
print dict

Then, you can loop through it like this:

dict = {1:2,3:3}
print dict

for i in dict:
    print i, "=", dict[i]

Hope it helps!

Upvotes: 0

Óscar López
Óscar López

Reputation: 236004

Try this:

lst = [('item1', 'value1'), ('item2', 'value2'), ('item3', 'value3')]
print ', '.join(str(x) + '=' + str(y) for x, y in lst)

I'm explicitly converting to string the items and values, if one (or both) are already strings you can remove the corresponding str() conversion:

print ', '.join(x + '=' + y for x, y in lst)

Upvotes: 1

Jon Clements
Jon Clements

Reputation: 142136

You're after something like:

>>> a = [('val', 1), ('val2', 2), ('val3', 3)]
>>> ', '.join('{}={}'.format(*el) for el in a)
'val=1, val2=2, val3=3'

This also doesn't care what type the tuple elements are... you'll get the str representation of them automatically.

Upvotes: 13

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