使用 Python pandas 将空白行插入 csv

Question

I'm looking to insert a blank row to the top of a csv. I can't figure out how to do this?

#df_marks = df_marks.append(new_row, ignore_index=True)

#header_list = ["","","","","","","","","","","","","","","","","","","","","","","","","","","","","",""]
#ordersUnleashed = pd.read_csv("ClientOrders.csv", names=header_list)

#insert empty row up top
#ordersUnleashed.iloc[0] = [''] * 30
#ordersUnleashed.loc['0'] = ['','','','','','','','','','','','','','','','','','','','','','','','',''

#set headers or move rows down one and add columns
ordersUnleashed.columns = ["*Order Number", "*Customer Code", "Tax Code", "Tax Rate", "Exchange Rate", "Customer Reference", "Comments", "Order Date (DD/MM/YYYY)", "Quote Expiry Date (DD/MM/YYYY)", "Required Date (DD/MM/YYYY)", "Warehouse Code", "Delivery Contact", "Delivery Name", "Delivery Street Address", "Delivery Street Address 2", "Delivery Suburb", "Delivery City", "Delivery Region", "Delivery Post Code", "Delivery Country", "Delivery Instruction", "Discount (%)", "Sales Order Group", "Sales Person Email", "*Line Number"," *Product Code", "*Order Quantity", "Line Discount (%)", "Unit Price", "Line Comments"]
df.head()

Answer 1

I don't believe the functionality exists in pandas. to_csv() does accept any file object though, so you can simply write a line to the file and then have pandas append to the bottom of this open file.

with open('my_file.csv', 'w') as f:
  f.write('\n')
  df.to_csv(path_or_buf=f, index=False)