Variable and constant with the same name in python

Question

If I execute the following code in python on CPython interpreter, it works as expected:

A = 1
a = 2
print(A)
print(a)

Output:

1
2

The question is will this behavior persist with other implementations of Python interpreters? Can I rely on this and produce such a code?

'systems that consider different case of the same letter to be the same' - which system would that be, and what exactly do you mean by that? — Thierry Lathuille
– Thierry Lathuille, Commented May 12, 2020 at 21:52
are you thinking of Windows file-paths, which are case-insensitive? That's not at all relevant to Python code: Python variables are always case sensitive, and the underlying operating system the code is running on is irrelevant. — Robin Zigmond
– Robin Zigmond, Commented May 12, 2020 at 21:54
Yes, this will work on all systems. The python interpreter is case-sensitive, regardless of the platform. — Lord Elrond
– Lord Elrond, Commented May 12, 2020 at 21:55
A != a. Python interpreter is case sensitive. These are two different objects. — r.ook
– r.ook, Commented May 12, 2020 at 22:10

Diggy. · Accepted Answer · 2020-05-12 21:45:39Z

2

These effectively are just two different variables, so I would imagine that this behaviour will persist in all systems.

By convention, constants are upper-case. However, Python is seeing two completely different variables, as it's a case-sensitive language.

Not entirely sure if relevent, but see here for naming conventions.

answered May 12, 2020 at 21:45

Diggy.

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1 Comment

Thanks for the answer. Re names: I used A and a just as an example, of course.