df_1.to_csv(directory + '1.csv', index=False, header= True)

df=pd.read_csv(os.path.join(directory,'1.csv'))

df[['Order Qty (SL)','Confirmed Qty (SL)','Unconfirmed Qty (SL)','Cancelled Qty (SL)','Open Qty (SL)','Reserved Qty (SL)',

    'Fixed Qty (SL)','% Allocation (SL)','Delivered Qty (SL)','PGI Qty (SL)','Invoiced Qty (SL)',
    'Net Unit Price','Confirmed Net Value (SL)','Dollars Shipped (SL)','% Shipped/Allocated (SL)']] =[['Order Qty (SL)','Confirmed Qty (SL)','Unconfirmed Qty (SL)',
                                                                                                                       'Cancelled Qty (SL)','Open Qty (SL)','Reserved Qty (SL)',

    'Fixed Qty (SL)','% Allocation (SL)','Delivered Qty (SL)','PGI Qty (SL)','Invoiced Qty (SL)',
    'Net Unit Price','Confirmed Net Value (SL)','Dollars Shipped (SL)','% Shipped/Allocated (SL)']].apply(pd.to_numeric,axis=1)

df[['Order Qty (SL)','Confirmed Qty (SL)','Unconfirmed Qty (SL)','Cancelled Qty (SL)','Open Qty (SL)','Reserved Qty (SL)',

    'Fixed Qty (SL)','% Allocation (SL)','Delivered Qty (SL)','PGI Qty (SL)','Invoiced Qty (SL)',
    'Net Unit Price','Confirmed Net Value (SL)','Dollars Shipped (SL)','% Shipped/Allocated (SL)']] /= 1000

print(df.head())


traceback: 

sys:1: DtypeWarning: Columns (32) have mixed types.Specify dtype option on import or set low_memory=False.
Traceback (most recent call last):
  File "C:\Users\Digital Wholesale - Documents\2. Amazon\Customer Operations_OTC\02. Amazon weekly Report\Amazon weekly automation (Giorgi)\VL.py", line 29, in <module>
    'Net Unit Price','Confirmed Net Value (SL)','Dollars Shipped (SL)','% Shipped/Allocated (SL)']] =[['Order Qty (SL)','Confirmed Qty (SL)','Unconfirmed Qty (SL)',
AttributeError: 'list' object has no attribute 'apply'

Process finished with exit code 1