Python | Check if a variable is string
While working with different datatypes, we might come across a time, where we need to test the datatype for its nature. This article gives ways to test a variable against the data type it is. Let’s discuss certain ways in which this task can be done.
Method #1 : Using isinstance(x, str)
This method can be used to test whether any variable is a particular datatype. By giving the second argument as “str”, we can check if the variable we pass is a string or not.
# Python3 code to demonstrate # Check if variable is string # using isinstance() # initializing string test_string = "GFG" # printing original string print("The original string : " + str(test_string)) # using isinstance() # Check if variable is string res = isinstance(test_string, str) # print result print("Is variable a string ? : " + str(res)) |
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Output :
The original string : GFG Is variable a string ? : True
Method #2 : Using type()
This task can also be achieved using the type function in which we just need to pass the variable and equate with a particular type.
# Python3 code to demonstrate # Check if variable is string # using type() # initializing string test_string = "GFG" # printing original string print("The original string : " + str(test_string)) # using type() # Check if variable is string res = type(test_string) == str # print result print("Is variable a string ? : " + str(res)) |
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Output :
The original string : GFG Is variable a string ? : True
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