Converting list of tuples to just a list in python

Question

I have:

my_column = [('Me ',), ('If ',), ('Will ',), ('If ',)]

I want to turn this into a simple list of strings:

['Me','If','Will','If']

Does this answer your question? [in Python, How to join a list of tuples into one list?](https://stackoverflow.com/questions/15269161/in-python-how-to-join-a-list-of-tuples-into-one-list) — astentx, Jul 05 '21 at 13:00

score 3 · Answer 1 · answered Jul 04 '21 at 14:12

3

Use itertools.chain.

>>> from itertools import chain
>>> list(chain(*my_column))
['Me ', 'If ', 'Will ', 'If ']

or

>>> list(chain.from_iterable(my_column))
['Me ', 'If ', 'Will ', 'If ']

answered Jul 04 '21 at 14:12

chepner

CodeMonkey · Accepted Answer · 2021-07-04T13:56:47.607

2

You can use list comprehension to convert a list of tuples into a list.

pairs = [('Me ',), ('If ',), ('Will ',), ('If ',)]
# using list comprehension
out = [item for t in pairs for item in t]
print(out)

Output:

['Me ', 'If ', 'Will ', 'If ']

If want to remove duplicates then replace [] notation with {} to create a set.

out = {item for t in a for item in t}

Output:

{'Me ', 'If ', 'Will '}

edited Jul 04 '21 at 13:56

answered Jul 04 '21 at 13:53

CodeMonkey

has there got a way to remove the space at the end of each of the word in the output list? – daniel Jul 04 '21 at 13:56
If want to strip whitespace from words use `out = [item.strip() for t in a for item in t]` – CodeMonkey Jul 04 '21 at 13:57

score 0 · Answer 3 · answered Jul 04 '21 at 14:14

0

my_column = [('Me ',), ('If ',), ('Will ',), ('If ',)]
list=list()
for i in my_column:
    for j in i:
        list.append(j)
print(list)

answered Jul 04 '21 at 14:14

3

Thank you for contributing an answer. Would you kindly edit your answer to to include an explanation of your code? That will help future readers better understand what is going on, and especially those members of the community who are new to the language and struggling to understand the concepts. – Jeremy Caney Jul 04 '21 at 23:44

3 Answers3