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gh-137818: Add multiple if statements example for list comprehensions #138217

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gh-137818: Add multiple `if` statements example for list comprehensions
Hello-world150 Aug 28, 2025
44db781
Merge branch 'main' into fix-issue-137818
Hello-world150 Aug 30, 2025
1d8128a
Update Doc/tutorial/datastructures.rst
Hello-world150 Nov 1, 2025
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27 changes: 27 additions & 0 deletions Doc/tutorial/datastructures.rst
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Expand Up @@ -245,6 +245,33 @@ and it's equivalent to::
Note how the order of the :keyword:`for` and :keyword:`if` statements is the
same in both these snippets.

Looking at another example::

>>> [x for x in range(10) if x % 2 if x % 3]
[1, 5, 7]

This example is equivalent to::

>>> result = []
>>> for x in range(10):
... if x % 2:
... if x % 3:
... result.append(x)
...
>>> result
[1, 5, 7]

This example could be further simplified by combining the two :keyword:if statements::

>>> result = []
>>> for x in range(10):
... if x % 2 and if x % 3:
... result.append(x)
...
>>> result
[1, 5, 7]


If the expression is a tuple (e.g. the ``(x, y)`` in the previous example),
it must be parenthesized. ::

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