Iterating over a list of tuples and inside tuples using a for loop

Question

Just wondering how to iterate over a list of tuples and also iterate through the items inside the tuples at the same time.

# I am able iterate over a list of tuples like this,
fruit_list = [('banana','apple','mango'),('strawberry', 'blueberry','raspberry')]
for fruit_tup in fruit_list:
    print(fruit_tup)

#output:
#('banana', 'apple', 'mango')
#('strawberry', 'blueberry', 'raspberry')

# Iterate through the items inside the tuples as so,
for (item1,item2,item3) in fruit_list:
    print(item1,item2,item3)

#output:
#banana apple mango
#strawberry blueberry raspberry

# This is incorrect but I tried to iterate over the tuples and the items inside the tuples as so
for fruit_tup,(item1,item2,item3) in fruit_list:
    print(fruit_tup,item1,item2,item3)

#required output:
#('banana', 'apple', 'mango') banana apple mango
#('strawberry', 'blueberry', 'raspberry') strawberry blueberry raspberry

Any idea on how to do this?

What if you have 3, 4, or N tuples in the list? What would you like to iterate on then? — Roy2012, Aug 02 '20 at 17:54

score 2 · Accepted Answer · answered Aug 02 '20 at 17:56

You need a nested loop:

fruit_list = [('banana','apple','mango'),('strawberry', 'blueberry','raspberry')]
for fruit_tup in fruit_list:
    for fruit in fruit_tup:
        print(fruit, end=' ') # no newline but a single space
    print() # now do a newline

Prints:

banana apple mango
strawberry blueberry raspberry

KetZoomer · Answer 2 · 2020-08-02T18:00:05.690

0

You can do the bellow:

for lst in fruit_list:
    for fruit in lst:
        print(fruit, end=' ')
    print()

edited Aug 02 '20 at 18:00

answered Aug 02 '20 at 17:54

KetZoomer

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score -1 · Answer 3 · answered Aug 02 '20 at 17:59

-1

To create a list of your outputs:

lst = [('banana','apple','mango'),('strawberry', 'blueberry','raspberry')]
output = [" ".join(tupel) for tupel in lst]

If you directly want to print them:

[print(" ".join(tupel)) for tupel in lst]

If you want to loop through the tupels and the list at the same time:

output = [fruit for tupel in lst for fruit in tupel]

answered Aug 02 '20 at 17:59

Andreas

7,669
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printing in list comprehension is not advised. – KetZoomer Aug 02 '20 at 18:01
List compheresion was to made to create a list. – KetZoomer Aug 02 '20 at 18:03
Because it is very anti-Pythonic. See: [Is it Pythonic to use list comprehensions for just side effects? ](https://stackoverflow.com/questions/5753597/is-it-pythonic-to-use-list-comprehensions-for-just-side-effects) – Booboo Aug 02 '20 at 18:06

Iterating over a list of tuples and inside tuples using a for loop

3 Answers3