I have a Python list consisting of integers:
a = [1, 2, 3]
I want to pass the items of this list as arguments to a function, and they must be strings:
myfunc("1", "2", "3")
How can I do it?
Add a comment
|
2 Answers
So... we use the * operator to use a sequence as multiple arguments for a function call; and we want to convert each argument to a string. The conversion is most obviously and simply done by just passing the value to the builtin str; we can then just map that conversion function onto the list. These are all elementary techniques and all we have to do is put them together:
myfunc(*map(str, a))
3 Comments
Joel Cornett
The edit is too small for me to make but the parentheses around
map() are extraneous.
jamylak
Why use an extra pair of brackets?
Karl Knechtel
Just force of habit, since in the code I've written lately, the
* is typically applied to a generator expression. I removed the extra parens and added some explanation.* keyword can unpacking the argument list.
a = [1, 2, 3]
myfunc(*(str(l) for l in a))
