I was working with scope in python
a = 10
{
a = 33
}
and I got this error,
File "", line 3 a= 33 ^ SyntaxError: invalid syntax
so it means block scope is only for functions in python?
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Hamza.S
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3its declaring a set – Sayse Jul 07 '22 at 18:20
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2You should first work through the [Python tutorial](https://docs.python.org/3/tutorial/) if not done yet. – Michael Butscher Jul 07 '22 at 18:21
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i thought we can define a scope like we did in js – Hamza.S Jul 07 '22 at 18:22
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but yeah it's declaring a set. – Hamza.S Jul 07 '22 at 18:22
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how to define a block scope then? – Hamza.S Jul 07 '22 at 18:22
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could be declaring a dictionary if you changed the `=` to `:` – kindall Jul 07 '22 at 18:22
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4Python doesn't have arbitrary block scopes. – chepner Jul 07 '22 at 18:22
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2Each function defines a scope, each module has its own global scope, and there's a process-wide built-in scope. That's it. – chepner Jul 07 '22 at 18:23
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Python doesn't use `{}` for creating statement blocks. – Barmar Jul 07 '22 at 18:24
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1There is no set "declaration". Set displays are expressions, and expressions cannot include assignments statements. – chepner Jul 07 '22 at 18:25
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1class definitions and comprehensions/generator expressions have their own scopes too – kindall Jul 07 '22 at 18:27
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@kindall Class definitions do not (`class` statements generate temporary *namespaces*). Comprehensions and generators scopes are another manifestation of function scopes (as they are implemented with implicit anonymous). – chepner Jul 07 '22 at 18:41
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If it looks like a scope and quacks like a scope... it's a scope. – kindall Jul 07 '22 at 18:49
1 Answers
0
def foo():
a = 33
print(f"Inside: {a}") # Inside: 33
a = 10
foo()
print(f"Outside: {a}") # Outside: 10
I think this example of function scope is the only way to get something like block scope in Python. Idea taken from OP and confirmed in Block scope in Python
amanda-collier
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Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Jul 08 '22 at 09:03