strptime() argument 0 must be str, not <class 'pandas.core.series.Series'>

This error message occurs when you try to pass a Pandas Series object as the argument to the strptime() function in Python. The strptime() function is used to convert a string representation of a date and time to a datetime object.

To fix this error, you need to convert the Pandas Series object to a string before passing it to the strptime() function. You can do this using the Series.astype() method, which converts the data type of the Series to the specified type. For example:

import pandas as pd
from datetime import datetime

# create a Pandas Series object
date_str = pd.Series(['2022-05-01', '2022-05-02', '2022-05-03'])

# convert the Series to a string
date_str = date_str.astype(str)

# use strptime() to convert the string to a datetime object
date_obj = datetime.strptime(date_str[0], '%Y-%m-%d')

In this example, we first create a Pandas Series object that contains three date strings. We then convert the Series to a string using the Series.astype() method. Finally, we use the strptime() function to convert the first date string in the Series to a datetime object.