Python Membership Operators

Python Membership operators are used to check whether a value or variable is in a sequence (eg – String, List, Tuple, Dictionary, Set) or not. All the membership operators and their application are shown below in the form of a table taking x and y as 1 and [1,2,3,4]. In the table, left operand x is the value or variable and right operand y is the sequence.

Operator	Example	Description	Result
in	x in y	Returns True if left operand is in the right operand else False	True
not in	x not in y	Returns True if left operand is not in the right operand else False	False

Now we will see about all the assignment operators in details with code –

Python IN Operator

Python IN operator Returns True if left operand is in the right operand else False .

Example 1: Python IN operator with various datatype

# in operator with text as right operand
print(" R in 'Rajkumar' =", "R" in "Rajkumar")
print(" v in 'Rajkumar' =", "v" in "Rajkumar")

# in operator with list as right operand
print(" R in '['R','A','J']' =", "R" in ['R','A','J'])
print(" v in '['R','A','J']' =", "v" in ['R','A','J'])

# in operator will act same for set and tuple as like list

# in operator with dictionary as right operand
# here in operator will check only dictionary key not values
print(" R in '{'R':1,'A':2,'J':3}' =", "R" in {'R':1,'A':2,'J':3})
print(" v in '{'R':1,'A':2,'J':'v'}' =", "v" in {'R':1,'A':2,'J':'v'})

# in operator with range function
print(" 2 in range(4) =", 2 in range(4))
print(" 6 in range(4) =", 6 in range(4))

 R in 'Rajkumar' = True
 v in 'Rajkumar' = False
 R in '['R','A','J']' = True
 v in '['R','A','J']' = False
 R in '{'R':1,'A':2,'J':3}' = True
 v in '{'R':1,'A':2,'J':'v'}' = False
 2 in range(4) = True
 6 in range(4) = False

In the above code we have seen the application of Python IN operator with various types of Python sequence –

• First , We have used in operator with text as right operand . As "R" letter is in the "Rajkumar" text so it returns True but "v" letter is not in the "Rajkumar" text so it returns False .
• Second , We have used in operator with list as right operand . As "R" letter is in the ['R','A','J'] list so it returns True but "v" letter is not in the ['R','A','J'] list so it returns False .
• Third , We have used in operator with dictionary as right operand . As "R" letter is in the {'R':1,'A':2,'J':3} dictionary key so it returns True but "v" letter is not in the {'R':1,'A':2,'J':3} dictionary key so it returns False .
• Last , We have used in operator with range function as right operand . As 2 is in the range(4) so it returns True but 6 is not in the range(4) so it returns False .

Python NOT IN operator

Python NOT IN operator Returns True if left operand is not in the right operand else False .

Example 1: Python NOT IN operator with various datatype

# not in operator with text as right operand
print(" R not in 'Rajkumar' =", "R" not in "Rajkumar")
print(" v not in 'Rajkumar' =", "v" not in "Rajkumar")

# not in operator with list as right operand
print(" R not in '['R','A','J']' =", "R" not in ['R','A','J'])
print(" v not in '['R','A','J']' =", "v" not in ['R','A','J'])

# not in operator will act same for set and tuple as like list

# not in operator with dictionary as right operand
# here in operator will check only dictionary key not values
print(" R not in '{'R':1,'A':2,'J':3}' =", "R" not in {'R':1,'A':2,'J':3})
print(" v not in '{'R':1,'A':2,'J':'v'}' =", "v" not in {'R':1,'A':2,'J':'v'})

# not in operator with range function
print(" 2 not in range(4) =", 2 not in range(4))
print(" 6 not in range(4) =", 6 not in range(4))

 R not in 'Rajkumar' = False
 v not in 'Rajkumar' = True
 R not in '['R','A','J']' = False
 v not in '['R','A','J']' = True
 R not in '{'R':1,'A':2,'J':3}' = False
 v not in '{'R':1,'A':2,'J':'v'}' = True
 2 not in range(4) = False
 6 not in range(4) = True

In the above code we have seen the application of Python NOT IN operator with various types of Python sequence –

• First , We have used not in operator with text as right operand . As "R" letter is in the "Rajkumar" text so it returns False but "v" letter is not in the "Rajkumar" text so it returns True .
• Second , We have used not in operator with list as right operand . As "R" letter is in the ['R','A','J'] list so it returns False but "v" letter is not in the ['R','A','J'] list so it returns True .
• Third , We have used not in operator with dictionary as right operand . As "R" letter is in the {'R':1, 'A':2, 'J':3} dictionary key so it returns False but "v" letter is not in the {'R':1,'A':2,'J':3} dictionary key so it returns True .
• Last , We have used not in operator with range function as right operand . As 2 is in the range(4) so it returns False but 6 is not in the range(4) so it returns True .

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