To flatten a list of lists, one might use a _______ within a list comprehension.
- Join() Function
- Nested List
- Nested Loop
- Zip() Function
To flatten a list of lists, you can use the 'zip()' function within a list comprehension. It combines elements from multiple lists into pairs, effectively flattening them.
The _______ attribute of an exception object returns a tuple containing an exception type, a value, and a traceback object.
- args
- error_details
- exception_info
- traceback_info
The 'args' attribute of an exception object returns a tuple containing information about the exception, including the exception type, a value (exception message), and additional details if any. This information is useful for debugging and error handling.
In what scenario might using a defaultdict be more appropriate than using a standard dictionary?
- When you need constant-time lookups
- When you need to handle missing keys more gracefully
- When you need to sort the dictionary
- When you want to save memory space
A defaultdict is useful when you want to handle missing keys more gracefully by providing a default value or factory function. It can simplify code that deals with non-existent keys.
The process of giving an extended meaning to operators for user-defined data types is called _______.
- Operator Customization
- Operator Definition
- Operator Extension
- Operator Overloading
The process of giving an extended meaning to operators for user-defined data types is called Operator Overloading. It allows you to define how operators behave with custom objects.
Which of the following tools is used to create isolated Python environments?
- Anaconda
- PyDist
- PyEnv
- Virtualenv
'Virtualenv' is a tool used to create isolated Python environments. It allows you to work on different projects with their own dependencies without conflicts.
In what scenario is the __name__ attribute of a module set to its own module name instead of "__main__"?
- When the module is a built-in module
- When the module is defined in Python 2.x
- When the module is imported as a library
- When the module is the main program
The __name__ attribute of a module is set to its own module name when it's imported as a library by another module. It's set to "__main__" when the module is the main program being executed.
Which of the following will catch all exceptions in Python?
- try/except
- try/except: AllExceptions
- try/except: BaseException
- try/except: Exception
To catch all exceptions in Python, you can use 'try/except' with 'BaseException' as the exception type, which is the base class for all exceptions.
When creating a custom exception, it should typically inherit from _______.
- BaseException
- Error
- Exception
- RuntimeError
When creating a custom exception in Python, it is advisable to inherit from the 'Exception' class, which is the base class for all built-in exceptions. This allows your custom exception to be treated like a standard exception.
To compile a Python script to bytecode without executing it, the command used is python -_______ .
- c
- compile
- noexec
- pyc
To compile a Python script to bytecode without executing it, the command used is python -m py_compile . The -m flag is used to invoke the py_compile module, and is the Python script you want to compile.
In a series of if, elif, and else, how many times can elif appear?
- Any number
- Multiple times
- Never
- Only once
In Python, you can have multiple elif branches in a series of if, elif, and else statements. It allows you to test multiple conditions before falling back to the else block if none of the conditions are met.