Re: Collecting unassigned Expressions

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 ):
...

  .