Which term describes an error in which the variable has NOT been defined before being used?
This error is called an "undefined variable" error.
Which error will occur if the code includes the line a=b/0?
A "division by zero" error will occur if the code includes the line `a=b/0`.
Which error statement can you expect to see if there is an error in opening a file or printing?
If there is an error in opening a file or printing, you can expect to see an "IOError" error statement.
Why would you choose to use the sys module?
The `sys` module in Python provides access to system-specific variables and functions, such as the command-line arguments, the Python interpreter's options and constants, the size and byte order of the interpreter's data types, and many more. It is useful for writing platform-independent code, as it allows you to write code that can run on different operating systems without having to worry about the underlying system specifications. The `sys` module can also be used for system-level utilities, advanced debugging techniques, and interacting with the interpreter itself. Therefore, you would choose to use the `sys` module for tasks that require low-level access to the system or the Python interpreter itself.
What does sys.exc_info() [0] do?
The function call `sys.exc_info()[0]` in Python returns the type of the exception that was raised during the execution of the current code block.
Here's how the function works:
- `sys.exc_info()` returns a tuple containing information about the current exception being handled by the program. The tuple contains three elements: the exception type, the exception object, and a traceback object that provides information about where the exception occurred in the code.
- `[0]` is used to access the first element of this tuple, which is the type of the exception.
So, `sys.exc_info()[0]` specifically extract the type of the current exception being handled in the code block.
This information can be used, for example, to handle exceptions in a specific way, based on the type of the exception that was raised.
What will be the output of these lines of code? For i in range (1, 5):
print (i)