The “AssertionError: Group argument must be None for now” error is typically encountered when using the
pandas library in Python and indicates that the
group argument of a function or method was not set to
None. This error usually occurs when the function or method being called does not support grouping or aggregation of data.
For example, the
pandas.DataFrame.sort_values() method is used to sort a DataFrame based on one or more columns. This method has a
group parameter that can be used to specify a grouping criterion. If the
group parameter is set to a value other than
None, an AssertionError will be raised with the message “Group argument must be None for now”.
To avoid this error, simply ensure that the
group parameter is set to
None when calling the function or method in question. For example:
import pandas as pd df = pd.read_csv("data.csv") # Correct usage df.sort_values(by=["col1", "col2"], group=None) # Incorrect usage df.sort_values(by=["col1", "col2"], group="col3") # AssertionError: Group argument must be None for now
It’s also worth noting that some functions or methods may not have a
group parameter at all, in which case this error will not be encountered.