How to Export Nested Lists to CSV Files in Python?

Exporting Nested Lists to CSV Files in Python

Writing nested lists, where each inner list contains elements of different types, to CSV files can be a common task when working with data in Python. Here's how to tackle this challenge:

Python's csv module provides convenient methods for handling CSV operations. To write a list of lists such as a = [[1.2,'abc',3],[1.2,'werew',4]] to a CSV file, follow these steps:

1. Open a file for writing in newline mode.

   import csv
   
   with open('out.csv', 'w', newline='') as f:
       ...

2. Create a CSV writer object.

   writer = csv.writer(f)

3. Write the list of lists to the file using writerows().

   writer.writerows(a)

This approach will generate a CSV file with each inner list on a separate line, with elements separated by commas. The format of the data in a will be preserved in the CSV file, with float, string, and integer elements intact.

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