Traceback (most recent call last): Python's tracebacks explained

When exceptions go unhandled, Python prints a traceback. Tracebacks are *read from the bottom upward*. The last line describes *what* happened and lines above describe *where* it happened. 00:00 Traceback (most recent call last)? 00:25 Read the last line in a traceback first 01:17 The lines in a traceback represent frames in the "call stack" 02:11 Reading up the call stack to fix the bug 02:58 Read your tracebacks from the bottom upward