Python

Python Operators

Written by ProgrammingPot

In this tutorial, you will learn about Python Operators and their types. Also, we will discuss their operational functionalities with examples.

Python Operators


A Python Operator is a symbol that tells the interpreter to perform certain mathematical or logical manipulation. In simple terms, we can say Python operators are used to manipulating data and variables. In programming universe, operators represent computations and conditional resemblance.

Python operators can be classified as listed below.

Python Arithmetic Operators


As the name suggests, Arithmetic Operators are used in Arithmetic (Mathematics) operations.

Let’s assume following two variables:

  • x = 5
  • y = 2
Operator Name & Meaning Example & Result
+ Addition: Add two operands or unary plus x + y = 7
Subtraction: Subtract right operand from the left x – y = 3
* Multiplication: Multiplies two operands x * y = 10
/ Division: Divides left operand by the right one x / y = 2.5
% Modulus – Takes the remainder x % y = 1
// Floor division: Division that results into the whole number truncating digits after decimal point x // y = 2
** Exponent – left operand raised to the power of right x**y (5^2) = 25

Example demonstrating use of Python Arithmetic operator

Python Operators

Python Relational Operator or Comparison Operator


Relational or Comparison Operators are used to compare the operands on the either side of them.

Operator Meaning
> Greater than: Eg. x > y will return true if x is greater than y
< Less than: Eg. x < y will return true if x is less than y
== Equal to: Eg. x == y will return true if x is equal to y
!= Not equal to: x != y will return true if x is not equal to y
>= Greater Than or Equal to: Eg. x >= y will return true if x is greater than or equal to y
<= Less Than or Equal to: Eg. x <= y will return true if x is less than or equal to y

Example demonstrating use of Python Logical operator

python_logical_operator

Python Assignment Operators


As simple as it sounds assignment operators are used for assigning values to variables.

Operator Example Meaning
= x = 1 Assigns 1 to x
+= x += 1 x = x + 1
-= x -= 1 x = x – 1
/= x /= 1 x = x / 1
%= x %= 1 x = x % 1
*= x *= 1 x = x * 1
**= x **= 1 x= x ** 1
//= x //= 1 x = x // 1

Example demonstrating use of Python Assignment operator

Python Bitwise Operators


Bitwise operators take binary digits as operands and perform bit by bit operations.

Following is the list of bitwise operators supported in Python.

let’s assume:

  • a = 5 = 0101 (in binary)
  • b = 7 = 0111 (in binary)

Now if we were to use bitwise operator AND (&), it would generate following output.

a&b = 0101 & 0111 = 0101

Explanation: Here bitwise operator performs bit by bit operation. So, if we observe from left most bit, following operation happens.

(1st bit) 0&0 = 0, (2nd bit) 1&1 = 1, (3rd bit) 0&1 = 0, (4th bit) 1&1 = 1

Hence the output: 0101

Here is the list of bitwise operators in Python.

Operator Example Operation
& (Binary AND) a & b 0101 & 0111 = 0101
| (Binary OR) a | b 0101 | 0111 = 0111
^ (Binary XOR) a ^ b 0101 ^ 0111 = 0010
~ (Binary NOT) ~ a ~5 = -6  (11111010)
>> (Binary right shift) a >> 1 0101>>1 = 0010
<< (Binary left shift) b << 1 0111<<1 = 1110

Python Membership Operators


Python membership operator is used to check whether a variable is a member of a sequence such as String, List, Tuple and Dictionary.

Note: In the Python dictionary, we can check the membership of key only, not the value.

Here are the membership operators in Python.

Operator Example Description
in x in y True if x is the member of y
not in x not in y True if x is not the member of y

Example demonstrating use of Python Membership operator

Python Identity Operators


Python identity operators are used to check if the operands have identical memory location. In simple language, it compares the memory location of two objects and returns True if both objects have identical or same memory location.

Here are the identity operators in Python.

Operator Example Description
         is      x is y                   True if both variables point to same memory location
     is not     x is not y                   True if both variable point separate memory location

Example demonstrating use of Python Identity operator

So, these are the Python operators explained above with examples which are used in manipulating data either mathematically or logically.

Now that we have discussed Python operators, let’s learn about how is the precedence of operators in Python.

Precedence of Python Operators

Here is the list of Python Operators in descending order, listing from higher precedence to lower precedence.

Operator Description
( )      Parentheses
**      Exponent (raise to the power)
 +, -, ~      Unary plus, Unary minus and Bitwise NOT
*, /, %, //      Multiplication, Division, Modulus and Floor Division
+, –      Addition and Subtraction
>>, <<      Bitwise Right Shift and Bitwise Left Shift
&      Bitwise AND
^, |      Bitwise XOR and OR
<=, <, >, >=      Comparison Operators
==, !=      Equality Operators
=, %=, /=, //=, -=, +=, *=, **=      Assignment Operators
is, is not     Identity Operators
in, not in     Membership Operators
not, or, and     Logical Operators

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