Function to band values in a dataframe [duplicate]

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• Binning column with python pandas 1 answer

Trying to write a function to band values in a dataframe. Below is what I've got but it throws the error: 'str' object has no attribute 'isbetween'. Not sure if my if-statement is correct either. Any thoughts appreciated.

def get_valueband(value):
valueband = None
if value == '':
    valueband = ''
elif value.isbetween(0,25):
    valueband = '0to25'
elif value.isbetween(25,50):
    valueband = '25to50'
elif value.isbetween(50,75):
    valueband = '50to75'
else:
    valueband = '75to100'
return valueband

turnover_question['answer_value_band'] = turnover_question.answer_value.apply(get_valueband)