输入数据后的CSV Python附加标题

Question

I have a CSV file in which I have already got all the data inside and I simply just need to write the header to the file without having to rewrite the whole file.

Example before:

Jim Bob
Sam Ham

Example after:

FirstName LastName
------------------
Jim       Bob
Sam       Ham

Answer 1

Assuming df is your dataframe
df.columns = ["First_Name", "Last_Name" ]