Here is how to check if a string is empty in Python.

my_string = ""
if not my_string:
    print("String is empty.") 

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In Python, you can check if a string is empty by using the 'not' operator as shown in the code above. 

You can also use the 'len' function that returns the number of characters in a string. If the number of characters is 0, then the string is empty.

my_string = ""
if len(my_string) == 0:
    print("String is empty.")

Another alternative would be to use the bool() function. This will check if the string is empty or not, returning True if it's empty and False if it's not.

my_string = ""
if not bool(my_string):
    print("String is empty.")

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