Why wont this work? - def (function) not being called from main()

Question

I need to be able to use classes, but trying to just get my simple code to work

import pandas as pd, numpy as np
 
class OutOfCountry7ViewModel():

    def pandas_conversion(self):
        #from csv import readers
        deImport = pd.read_csv("ooc-exceptions.csv")
        d1 = pd.read_csv("CS_Out_Of_Country.csv", encoding='windows-1252', parse_dates=True)
        d2 = pd.read_csv("sccm-devices.csv", encoding='windows-1252')
        d3 = pd.read_csv("CTLDAPRawData.csv", encoding='windows-1252')

        #pandas join magic
        lj_df1 = pd.merge(d1, d2, left_on="ComputerName", right_on="Name", how="left")
        lj_df2 = pd.merge(d2, d3, left_on="PrimaryUser", right_on="Employee Number", how="left")
        #lj_df = plj_df1d.join(lj_df2, lsuffix=)

        df = (lj_df1)
        #print(df)
        df.to_csv('CS_Out_of_country_tabl.csv', index=False,header=df.columns, encoding='utf-8')
        csv = 'CS_Out_of_country_tabl.csv'
        return csv

    def main():
        pandas_conversion(self)

    if __name__ == '__main__':
        main()

i keep getting an error, NameError: name 'pandas_conversion' is not defined

Answer 1

Are you trying to do something like this? -

import pandas as pd, numpy as np
 

class OutOfCountry7ViewModel():

    def pandas_conversion(self,csv):
        ...

    def main(self):
        self.pandas_conversion(csv)


if __name__ == '__main__':
    some_object = OutOfCountry7ViewModel()
    some_object.main()

Answer 2

This should work:

a = OutOfCountry7ViewModel()
a.pandas_conversion()

Hope this helped!

Answer 3

Try to remember the semantics and indentation of python.

• Unused import numpy
• Class/Parent Class has no (), Line 3

class OutOfCountry7ViewModel(): #wrong

class OutOfCountry7ViewModel: #right

• There is no need of ()

df = (lj_df1)
#if you using some func then you miss that func name

• If you're defining a method in the class you've to add instance self

def main(self):
        pandas_conversion(self) #wrong calling func with parameter

I think your code is wrong because in PyCharm, it says def pandas_conversion(self): may be static. So, your code is incomplete, there is something missing that we can't find.