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Python Python Collections (Retired) Lists Redux Combining Lists

pawkan kenluecha
pawkan kenluecha
26,303 Points

Is it still valid to use "range()" ?

Hello.

I tried to use this code in console and I got this error.

our_list = list(range(10))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'range' object is not callable

What is the meaning of this ? Is this still possible to use ?

2 Answers

The only thing that I can see is that you are redefining range somewhere before that in your code. When I redefined range, then I got the same error as you, but without redefining it, list(range(10)) should work fine.

pawkan kenluecha
pawkan kenluecha
26,303 Points

So, Is that some kinds of a bug in the console ? I've seen the same thing in the instruction video. Sometimes when he tried to use some function, it's error. And after he re-typed it again,he could execute properly.

Not a bug, really. It's an exception (or an error). Python throws you an exception when it can't perform what you've asked it to do. For some reason it's giving you a TypeError exception regarding range; which means that range isn't set up the way that it should normally be. The only solution to that which I can see is that you are overwriting range.

I'm assuming that you've assigned range to a variable since it's telling you that it's not callable. Variables aren't callable, and since functions and objects are, I don't see another way that this could be happening.

pawkan kenluecha
pawkan kenluecha
26,303 Points

The problem is I am very certain that I wouldn't have defined it as a variable. Keyword "range" isn't suitable to declare at that exercise. Because most of that lesson was taking about "list". I think I should drop this topic out, whether it's a bug or not I can execute it by now when I reopen the new windows. Thanks for the answers though.

Alex Donald
PLUS
Alex Donald
Courses Plus Student 13,129 Points

I had this issue because I had previously used "list" as a variable. Therefore Python was trying to pass the range to my list. Perhaps I should be more inventive with variable names!