[Python] Run a dataframe of URLs through a function - Python

I am trying to use a dataframe that contains a bunch of URLs and run each individual URL through a function. Note: the function works perfectly if called with a single URL i.e. myfunction(https://www.example.com).

# Example Dataframe (df)
# Page Links
# 0 https://www.example.com
# 1 https://www.example2.com
# 2 https://www.example3.com
# 3 https://www.example4.com

def myfunction(url):
...code...

new_df = df.apply(myfunction, axis=1)


This is the error I get:

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