Python 3 - Second Edition

4.5    In Case of Error

Perhaps you’ve already played with the sample program from Section 4.3 and come across the following or similar output from the interpreter:

  File "hello_world.py", line 10    if attempt != secret                       ^SyntaxError: expected ':'  

This is an error message that indicates a syntax error in the program. Can you tell what exactly the error is in this case? Correct: the colon at the end of the line is missing.

Python provides important information when outputting an error message, which is helpful in troubleshooting:

• The first line of the error message indicates in which line and within which file the error occurred. In this case, it’s line 10 in the hello_world.py file.

• The middle part shows the affected section of the source ...