how to define empty variable in python

Question

consider this code:

str = "test"
def v():
    for i in str:
        k = k + i
        print(k)

I don't want to assign k anything at all. I used k = None to define empty variable but that doesn't work.

A side-mistake: do not use str because it is a built-in function in Python (docs.python.org/2/library/functions.html) — Don
– Don, Commented Jul 17, 2014 at 8:30

Victor Castillo Torres · Accepted Answer · 2014-07-17 19:30:22Z

2

Simple as this:

str="test"
def v():
    k = ""
    for i in str:
        k=k+i
        print(k)

Another advice, str is a built-in type in python you maybe would like to change it for:

string="test"
def v():
    k = ""
    for i in string:
        k=k+i
        print(k)

answered Jul 17, 2014 at 8:26

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