Adding a column to a CSV file will append a new column to every single row in a CSV file.
Solution for How to add a column to a CSV file in Python : You can use pandas to add a column to a CSV file Call pandas.read_csv(filename) to create a pandas.DataFrame from the CSV filename. Use DataFrame[column_name] = “” to create a new column column_name. Call DataFrame.to_csv(filename, index=False) to output the DataFrame as a CSV file, ignoring the index values.
Use the syntax DataFrame[column_name] = value to create a column with every row assigned to value.
sample.csv
