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2024-04-22 Python

Compound Statements

Compound statements and comparisons allow comparisons of 2 or more things in a single statement.

>>> x = 5
>>> 3 < x < 7
True

or:

>>> False == False in [False]
True

Abstract Syntax Tree#

One can use ast to invetigate:

import ast
print(ast.dump(ast.parse('False == False in [False]'), indent=4))

Module(
    body=[
        Expr(
            value=Compare(
                left=Constant(value=False),
                ops=[
                    Eq(),
                    In()],
                comparators=[
                    Constant(value=False),
                    List(
                        elts=[
                            Constant(value=False)],
                        ctx=Load())]))],
    type_ignores=[])

It shows comparison of the left value being compared against both the middle and right values.

Assigning 2 variables at once:

>>> print(ast.dump(ast.parse('x = y =7'), indent=4))
Module(
    body=[
        Assign(
            targets=[
                Name(id='x', ctx=Store()),
                Name(id='y', ctx=Store())],
            value=Constant(value=7))],
    type_ignores=[])

Sources:#