Basic Python 16: Python Operators Special operators

Опубликовано: 23 Сентябрь 2022
на канале: Testing Tutorialspoint

Python Operators - Special operators:
-------------------------------------
Python language offers some special types of operators like the identity operator or the membership operator.

Identity operators:

is and is not are the identity operators in Python. They are used to check if two values (or variables) are located on the same part of the memory. Two variables that are equal does not imply that they are identical.

is True if the operands are identical (refer to the same object) x is True
is not True if the operands are not identical (do not refer to the same object) x is not True
ex;
x1 = 5
y1 = 5
x2 = 'Hello'
y2 = 'Hello'
x3 = [1,2,3]
y3 = [1,2,3]

Output: False
print(x1 is not y1)

Output: True
print(x2 is y2)

Output: False
print(x3 is y3)

Membership operators:

in and not in are the membership operators in Python. They are used to test whether a value or variable is found in a sequence (string, list, tuple, set and dictionary).
ex:
in True if value/variable is found in the sequence 5 in x
not in True if value/variable is not found in the sequence 5 not in x

x = 'Hello world'
y = {1:'a',2:'b'}

Output: True
print('H' in x)

Output: True
print('hello' not in x)

Output: True
print(1 in y)

Output: False
print('a' in y)
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