How to build a loop with a range in python with a dynamically changing final value?

Question

Python

There is a function:

def keylist():
    for x in list(range(0,100)):
        print(furl.format((data["values"][x]["key"])))

I want to get rid of the error:
Traceback (most recent call last):
File "C:/[Python]/pt/func.py", line 28, in
keylist()
File "C:/[Python]/pt/func.py ", line 25, in keylist
print(furl.format((data["values"][x]["key"])))
IndexError: list index out of range
Tell me how to do it!?