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devel / comp.lang.python / Re: Collecting unassigned Expressions

SubjectAuthor
* Collecting unassigned ExpressionsGuenther Sohler
`- Collecting unassigned ExpressionsStefan Ram

1
Collecting unassigned Expressions

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From: guenther.sohler@gmail.com (Guenther Sohler)
Newsgroups: comp.lang.python
Subject: Collecting unassigned Expressions
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 by: Guenther Sohler - Thu, 24 Aug 2023 11:23 UTC

Hi

I am wondering If an embedded Python Interpreter can detect unassigned
Expressions. Cases where functions Return values but they are Not
assignwd. E.g.
Calc_square(4)
Or
3*4-myval()

Thank you for your hints

Re: Collecting unassigned Expressions

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From: ram@zedat.fu-berlin.de (Stefan Ram)
Newsgroups: comp.lang.python
Subject: Re: Collecting unassigned Expressions
Date: 25 Aug 2023 23:31:06 GMT
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 by: Stefan Ram - Fri, 25 Aug 2023 23:31 UTC

Guenther Sohler <guenther.sohler@gmail.com> writes:
>I am wondering If an embedded Python Interpreter can detect unassigned
>Expressions. Cases where functions Return values but they are Not
>assignwd. E.g.
>Calc_square(4)
>Or
>3*4-myval()

1. If "Calc_square(4)" appears in the context "n=Calc_square(4)",
then its value is assigned. So, it is not necessarily an example
of a function call expression the value of which is not assigned.

2. In Python function call expressions always have a value.

3. If you can modify the the interpreter, you surely can make it
emit an expression such as "Info: The value of the function call
expression 'Calc_square(4)' was not bound to an identifier.".

4. You also can use the parser library that comes with Python to
parse source code and detect such situations yourself. E.g.,

import ast
....
parse = ast.parse( source, filename )
for entry in ast.walk( parse ):
....

.

devel / comp.lang.python / Re: Collecting unassigned Expressions

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