Question

I need to “concatenate to a string in a for loop”. To explain, I have this list:

list = ['first', 'second', 'other']

And inside a for loop I need to end with this:

endstring = 'firstsecondother'

Can you give me a clue on how to achieve this in python?

Answer 1

That’s not how you do it.

>>> ''.join(['first', 'second', 'other'])
'firstsecondother'

is what you want.

If you do it in a for loop, it’s going to be inefficient as string “addition”/concatenation doesn’t scale well (but of course it’s possible):

>>> mylist = ['first', 'second', 'other']
>>> s = ""
>>> for item in mylist:
...    s += item
...
>>> s
'firstsecondother'