AttributeError: 'int' object has no attribute 'startswith'

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Borislav Hadzhiev

Last updated: Apr 20, 2022

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AttributeError: 'int' object has no attribute 'startswith' #

The Python "AttributeError: 'int' object has no attribute 'startswith'" occurs when we call the startswith() method on an integer. To solve the error, make sure the value you are calling startswith on is of type string.

attributeerror int object has no attribute startswith

Here is an example of how the error occurs.

main.py
my_str = 'hello world' my_str = 123 print(type(my_str)) # 👉️ <class 'int'> # ⛔️ AttributeError: 'int' object has no attribute 'startswith' print(my_str.startswith('hello'))

We reassigned the my_str variable to an integer and tried to call the startswith() method on the integer which caused the error.

If you print() the value you are calling startswith() on, it will be an integer.

To solve the error, you need to track down where exactly you are setting the value to an integer in your code and correct the assignment.

To solve the error in the example, we would have to remove the reassignment or correct it.

main.py
my_str = 'hello world' print(my_str.startswith('hello')) # 👉️ True

The str.startswith method returns True if the string starts with the provided prefix, otherwise the method returns False.

If you are trying to check if a number starts with specific digits, use the str() function to convert the integer to a string before calling startswith().

main.py
example = 12345 print(str(example).startswith('123')) # 👉️ True print(str(example).startswith('789')) # 👉️ False

You might also be assigning the result of calling a function that returns an integer to a variable.

main.py
def get_string(): return 100 my_string = get_string() # ⛔️ AttributeError: 'int' object has no attribute 'startswith' print(my_string.startswith('abc'))

The my_string variable gets assigned to the result of calling the get_string function.

The function returns an integer, so we aren't able to call startswith() on it.

To solve the error, you have to track down where the specific variable gets assigned an integer instead of a string and correct the assignment.

Conclusion #

The Python "AttributeError: 'int' object has no attribute 'startswith'" occurs when we call the startswith() method on an integer. To solve the error, make sure the value you are calling startswith on is of type string.

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