蟒蛇| 列表，For 循环混淆

Question

I am not clear why second output doesnt give me any results although the same line gives me results after the for loop. You can comment out one by one and check the output.

Thanks in advance !

three_rows = ["Albuquerque,749", "Anaheim,371", "Anchorage,828"]
#print(three_rows)   #1st output
#three_rows[0]       #2nd output -- no response!

final_list = []
for row in three_rows:
    split_list = row.split(',')
    final_list.append(split_list)

#print(three_rows)   #3rd output -- prints the whole list(expected)
#three_rows[1]       #4th output -- prints the 2nd element(expected)
#print(final_list)   #5th output -- prints the whole list(expected)
#final_list[0]       #6th output -- prints the first element(expected)

Answer 1

Check this python function return value .

So Python function always returns something at the end. In your case, for 2nd output, there are lines following it like the for loop etc. But for the 4th and 6th output(assuming you uncomment only one of them), it coincidentally happens to be the last code line of the module and hence during the exiting of the execution of your program, it returns whatever output comes from that and subsequently it gets printed on the console.