Membership Operators and Type Comparisons in Python
Python's membership operators check whether a sequence exists within an object, such as strings, lists, or tuples. The in operator returns True if the sequence is found, while the not in operator returns True if it is not.
12345678# Define a string containing all the vowels vowels = "aeiou" # Check if the character 'n' is present in the `vowels` string print('n' in vowels) # Check if the character 'a' is not present in the `vowels` string print('a' not in vowels)
In addition to checking membership, it's often necessary to verify the type of a variable before performing certain operations. For example, dividing a non-numeric value would cause an error. Python provides two ways to check the type: is and isinstance()
12345678# Initial number num = 3.5 # Checking if num is an integer using `is` operator print(type(num) is int) # Check if the variable is an integer using the 'isinstance' function print(isinstance(num, int)) # The second approach
Both methods return False because 3.5 is a float, not an int. The is operator checks for exact type matching, while isinstance() also supports checking against multiple types or inheritance.
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Python's membership operators check whether a sequence exists within an object, such as strings, lists, or tuples. The in operator returns True if the sequence is found, while the not in operator returns True if it is not.
12345678# Define a string containing all the vowels vowels = "aeiou" # Check if the character 'n' is present in the `vowels` string print('n' in vowels) # Check if the character 'a' is not present in the `vowels` string print('a' not in vowels)
In addition to checking membership, it's often necessary to verify the type of a variable before performing certain operations. For example, dividing a non-numeric value would cause an error. Python provides two ways to check the type: is and isinstance()
12345678# Initial number num = 3.5 # Checking if num is an integer using `is` operator print(type(num) is int) # Check if the variable is an integer using the 'isinstance' function print(isinstance(num, int)) # The second approach
Both methods return False because 3.5 is a float, not an int. The is operator checks for exact type matching, while isinstance() also supports checking against multiple types or inheritance.
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