Tools, FAQ, Tutorials:
Evaluation of Expressions
How expressions are evaluated in Python?
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Expressions are evaluated in Python based on precedence of each operation
list below:
Operator Description
-------- -----------
(expressions...), [expressions...], {key: value...}, {expressions...}
Binding or tuple display, list display, dictionary display, set display
x[index], x[index:index], x(arguments...), x.attribute
Subscription, slicing, call, attribute reference
await x Await expression
** Exponentiation [6]
+x, -x, ~x Positive, negative, bitwise NOT
*, @, /, //, % Multiplication, matrix multiplication division, remainder [5]
+, - Addition and subtraction
<<, >> Shifts
& Bitwise AND
^ Bitwise XOR
| Bitwise OR
in, not in, is, is not, <, <=, >, >=, !=, ==
Comparisons, including membership tests and identity tests
not x Boolean NOT
and Boolean AND
or Boolean OR
if – else Conditional expression
lambda Lambda expression
The (expression) has the highest precedence, so it will be evaluated first.
For operations of the same precedence, they will be evaluated from left to right.
For example, the following two expressions are evaluated with the same order and producing the same result:
>>> 2 * 3 + 4 10 >>> (2 * 3) + 4 10
2018-03-13, ∼2061🔥, 0💬
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