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Convert list of numbers to string of numbers - kam_uk - Nov-21-2020
Hi
I have a list
My_list = [1, 2, 3, 4, 5]I want to convert each number from an integer to a string.
I would normally use
My_string = ''.join(My_list)but that doesn't appear to work.... what am I doing wrong?
RE: Convert list of numbers to string of numbers - Larz60+ - Nov-21-2020
Use:
My_String = ' '.join([str(x) for x in My_list])you need to convert the individual integers to strings before join.
RE: Convert list of numbers to string of numbers - kam_uk - Nov-21-2020
Thanks, can you explain the code to me and why we are doing this? What is wrong with my first line?
RE: Convert list of numbers to string of numbers - Larz60+ - Nov-21-2020
each item in the original list is an integer.
the list comprehension (
[str(x) for x in My_list] )converts each to a string prior to the join.
RE: Convert list of numbers to string of numbers - ndc85430 - Nov-21-2020
As for why, because
join takes an iterable of strings, not an iterable of anything else, per the documentation.
RE: Convert list of numbers to string of numbers - deanhystad - Nov-21-2020
The list comprehension is a compact way to create a list. This
My_string = ''.join([str(num) for num in My_list])is the same as
temp = []
for num in My_list:
temp.append(str(num))
My_string = ''.join(temp)With the construction of the temp list being done by the code between the [].