Operator
This is a list of Python operators.
Contents
Arithmetic operators
 addition (
+
)  subtraction (

)  multiplication (
*
)  floating point division (
/
)  integer division (
//
) – rounds towards negative infinity  modulus (
%
) – remainder
Examples:
>>> 1 + 2 3 >>> 5  2 3 >>> 2 * 3 6 >>> 3 / 3 1.0 >>> 3 / 2 1.5 >>> 3 // 2 1 >>> 3 % 2 1
Comparison operators
The following operators work on numbers, sequences, and other data structures.
 equal (
==
)  not equal (
!=
)  greater than (
>
)  less than (
<
)  greater than or equal (
>=
)  less than or equal (
<=
)
Examples:
>>> 2 == 3 False >>> 3 == 3 True >>> 2 < 3 True >>> [1, 2] == [1, 2] True >>> "a" < "b" True
Logical operators

not
– negates the boolean expression 
and
– returns true if all the operands are true 
or
– returns true if one of the operands is true
Examples:
>>> 1 < 2 and 3 < 4 True >>> 1 < 2 or 3 > 4 True >>> not 1 < 2 False >>> not (1 < 2) False
and
and or
are shortcircuiting, which means that evaluation stops as soon as the outcome is determined

and
stops if there is a false value and returns false 
or
stops if there is a true value and returns true
The order of operations for boolean operators is not
, and
, or
. For example, the expression False or True and not False or False
can be rewritten as False or (True and (not False)) or False
, which evaluates to True
.
If not used in a boolean context, and
returns the first false value or the last value if all are true; or
returns the first true value or the last value if all are false. Examples:
>>> 0 and 1 # 0 is first false value 0 >>> 1 and 2 # both are true 2 >>> None or 2 # 2 is first true value 2 >>> None or 0 # both are false 0
Membership operators
in
and not in
work on sequences, dictionaries, and sets. See the article for the data structure for usage.
Identity operators
 Main article: Identity vs. equality#Identity (is, is not)
is
and is not
check if the operands point to the same object in memory.