Let's say the CSV file only contains a single column and you want to convert each item in the row into a list. Output, ,, , ]Īs you can see above, the output contains a list of lists. With open('ghost_write_rows.csv', 'r') as reader_obj: Let's use the CSV file from the previous example. In this example, we will learn how to read a CSV file into a list. We can read the CSV file into different Python data types such as list, dictionary or tuple. Reading CSV to a list in Python Example - 1 With open('ghost_write_rows.csv', 'a') as a_file: You can also open a file in append / a mode where the write position will always be at the end of the file (an append). With open('ghost_write_rows.csv', 'w') as w_file: This method is preferable if you have a large number of rows to write because it can write them out all at once. Writerows() on the other hand, takes a list of lists to write. With open('ghost_write.csv', 'w') as w_file: writerow()Īs you can see below, writerow() takes an iterable of cells (single list) to write. There are two methods to write to CSV files that are writerow() and writerows() writerow() takes one row, and writerows() takes multiple rows at a time. To write to a CSV file in Python, we can use the (as you may have already guessed) csv.writer() method.
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