CODEWITHSUNDEEP
pythonstringpython-3.xtuples
2Xchampion
2Xchampion

Reputation: 656

Extract a 2-element tuple and convert it to String

So I have a list of random words like this:

[('Frenchy', 'INTENSE'), ('Frenchy', 'ComputerScienceFTW'), ('Frenchy', 'HelloMrGumby'), ('INTENSE', 'Frenchy'), ('INTENSE', 'ComputerScienceFTW'), ('INTENSE', 'HelloMrGumby'), ('ComputerScienceFTW', 'Frenchy'), ('ComputerScienceFTW', 'INTENSE'), ('ComputerScienceFTW', 'HelloMrGumby'), ('HelloMrGumby', 'Frenchy'), ('HelloMrGumby', 'INTENSE'), ('HelloMrGumby', 'ComputerScienceFTW')]

which is a product of permutation. Now that I have this, I wish to add the item in the tuple together like this:

[('Frenchy', 'INTENSE')] # Was this
'FrenchyINTENSE' # Now this

Is there a way to do it elegantly?

Upvotes: 1

Views: 443

Answers (3)

felipsmartins
felipsmartins

Reputation: 13549

For bigger iterables (and memory efficient usage) you maybe want to use something from itertools module, like starmap function:

import itertools

tuples = [('Frenchy', 'INTENSE'), ('Frenchy', 'ComputerScienceFTW'),]

result = itertools.starmap(lambda a, b: a + b, tuples)

And of course, this is a elegantly way to go too.

Upvotes: 2

Martijn Pieters
Martijn Pieters

Reputation: 1121494

Use a list comprehension to join them; this is easiest with the str.join() method:

[''.join(t) for t in list_of_tuples]

but you could also use unpacking and straight-up concatenation:

[a + b for a, b in list_of_tuples]

The str.join() method has the advantage that'll work for sequences of arbitrary length.

Demo:

>>> list_of_tuples = [('Frenchy', 'INTENSE'), ('Frenchy', 'ComputerScienceFTW'), ('Frenchy', 'HelloMrGumby'), ('INTENSE', 'Frenchy'), ('INTENSE', 'ComputerScienceFTW'), ('INTENSE', 'HelloMrGumby'), ('ComputerScienceFTW', 'Frenchy'), ('ComputerScienceFTW', 'INTENSE'), ('ComputerScienceFTW', 'HelloMrGumby'), ('HelloMrGumby', 'Frenchy'), ('HelloMrGumby', 'INTENSE'), ('HelloMrGumby', 'ComputerScienceFTW')]
>>> [''.join(t) for t in list_of_tuples]
['FrenchyINTENSE', 'FrenchyComputerScienceFTW', 'FrenchyHelloMrGumby', 'INTENSEFrenchy', 'INTENSEComputerScienceFTW', 'INTENSEHelloMrGumby', 'ComputerScienceFTWFrenchy', 'ComputerScienceFTWINTENSE', 'ComputerScienceFTWHelloMrGumby', 'HelloMrGumbyFrenchy', 'HelloMrGumbyINTENSE', 'HelloMrGumbyComputerScienceFTW']
>>> [a + b for a, b in list_of_tuples]
['FrenchyINTENSE', 'FrenchyComputerScienceFTW', 'FrenchyHelloMrGumby', 'INTENSEFrenchy', 'INTENSEComputerScienceFTW', 'INTENSEHelloMrGumby', 'ComputerScienceFTWFrenchy', 'ComputerScienceFTWINTENSE', 'ComputerScienceFTWHelloMrGumby', 'HelloMrGumbyFrenchy', 'HelloMrGumbyINTENSE', 'HelloMrGumbyComputerScienceFTW']

Upvotes: 3

timgeb
timgeb

Reputation: 78650

Use a list comprehesion. Unpack each tuple of strings and add the strings together.

>>> lst = [('Frenchy', 'INTENSE'), ('Frenchy', 'ComputerScienceFTW')]
>>> [a+b for a,b in lst]
['FrenchyINTENSE', 'FrenchyComputerScienceFTW']

Upvotes: 2

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