Pandas to_csv in for loop AttributeError: 'tuple' object has no attribute 'to_csv'

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Output:
Account_Number,Invoice_Date,Invoice_Number,Payor,Ground_Tracking_ID_Prefix,Express_or_Ground_Tracking_ID,Transportation_Charge_Amount,Net_Charge_Amount,Declared_Value,Service_Type,Ground_Service,Shipment_Date,POD_Delivery_Date,POD_Delivery_Time,POD_Signature_Description,Actual_Weight_Amount,Actual_Weight_Units,Rated_Weight_Amount,Rated_Weight_Units,Number_of_Pieces,Service_Packaging,Shipper_Company,Shipper_Name,Shipper_Address_Line_1,Shipper_Address_Line_2,Shipper_City,Shipper_State,Shipper_Postal_Code,Shipper_Country_Territory,Recipient_Name,Recipient_Company,Recipient_Address_Line_1,Recipient_Address_Line_2,Recipient_City,Recipient_State,Recipient_Postal_Code,Recipient_Country_Territory,API_Pickup_Date,API_First_Activity_Date,API_First_Activity_Time, API Delivery Date,API Delivery Time,First Attempt Date, First Attempt Time, Standard Transit By Date,Standard Transit By Time,Status,Reason,Exception,Result_Header,Result_Notes
X1231Z1123,4/13/2019,0000A031,P/P,,1Z112091091208143,,7.54,0,Standard,,,,,,25.3,L,26,L,1,PKG,XXXXXXXXXX,,XXXXXXXXXXXX,,XXXXXX,XX,XXXXX,XX,XXXXXX,XXXXXXXXXXXXXXX,XXXXXXX,,XXX,XX,XXXXXX,XX,4/8/2019,4/8/2019,18:02:00,4/12/2019,14:57:58,,,4/12/2019,23:30:00,XX-XXX,,,,
X1231Z1123,4/13/2019,0000A031,P/P,,1Z112091091208144,,7.54,0,Standard,,,,,,25.2,L,26,L,1,PKG,,,,,XXXXXX,XX,XXXXX,XX,XXXXXX,XXXXXXXXXXXXXXX,XXXXXXX,,XXX,XX,XXXXXX,XX,4/8/2019,4/8/2019,18:03:30,4/12/2019,14:57:58,,,4/12/2019,23:30:00,XX-XXX,,,,
X1231Z1123,4/13/2019,0000A031,P/P,,1Z112091091208145,,7.25,0,Standard,,,,,,24.7,L,25,L,1,PKG,,,,,XXXXXX,XX,XXXXX,XX,XXXXXX,XXXXXXXXXXXXXXX,XXXXXXX,,XXX,XX,XXXXXX,XX,4/8/2019,4/8/2019,18:02:33,4/12/2019,14:57:58,,,4/12/2019,23:30:00,XX-XXX,,,,
X1231Z1123,4/13/2019,0000A031,P/P,,1Z112091091208146,,4.64,0,Standard,,,,,,15,L,16,L,1,PKG,,,,,XXXXXX,XX,XXXXX,XX,XXXXXX,XXXXXXXXXXXXXXX,XXXXXXX,,XXX,XX,XXXXXX,XX,4/8/2019,4/8/2019,18:02:12,4/12/2019,14:57:58,,,4/12/2019,23:30:00,XX-XXX,,,,