<human>:  Give me a Python code to pretty print columns.
<bot>:)

# Calling the function
print((pretty_print_columns(matrix)))

#Example Output
#                                        1
#                                        2
#                                        3
#                                        4
#                                        5
#                                        6
#                                        7
#                                        8
#                                        9
# None

#Remember to inspect code for bugs.