Unnecessary parentheses in Python

"Python's if statements don't use parentheses In JavaScript if statements look like this: In Python, they look like this: Or do they? Python's if statements don't use parentheses. So if statements actually look like this: Sometimes folks learn this fact and think "ah so the parentheses are optional". But that's not the case. Python's if statements simply don't use parentheses."

"Sometimes parentheses are necessary to convey the order of execution for an expression. For example, 3 * (4 + 7) is different than 3 * 4 + 7: Those parentheses around 4 + 7 are for grouping that sub-expression, which changes the meaning of the larger expression. All confusing and unnecessary uses of parentheses are caused by this third use: grouping parentheses."

"Parentheses can go anywhere Pretty much any Python expression can be wrapped in parentheses. For example, all of these expressions do the same thing: Grouping parentheses can be wrapped around anything, regardless of whether they're useful. Parentheses for wrapping lines Parentheses can also allow expressions to be wrapped over multiple lines of code. This is called an implicit line continuation. For example, here's an if statement with a long condition that's wrapped over multiple lines: The parentheses in this"

Parentheses in Python serve three purposes: calling callables, creating empty tuples, and grouping expressions. Grouping parentheses change evaluation order and can be necessary, for example 3 * (4 + 7) differs from 3 * 4 + 7. If statements in Python do not use parentheses around their conditions; parentheses are not optional but simply not part of the if statement syntax. Python allows wrapping nearly any expression in parentheses, so grouping parentheses can be placed around expressions even when unnecessary. Parentheses also enable implicit line continuation, permitting long conditions or expressions to be split across multiple lines without backslashes.

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