Exercise: Standard Libraries

Questions for: Standard Libraries

What is the purpose of the contextlib module?
A:
Working with context managers
B:
Handling dates and times
C:
Parsing JSON data
D:
Sorting elements in a list
Answer: A
The contextlib module in Python provides utilities for working with context managers, including the contextlib.contextmanager decorator.
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Which method is used to join elements of a list into a single string?
A:
list.combine()
B:
list.concat()
C:
list.join()
D:
str.join()
Answer: D
The join() method is used to join elements of a list into a single string in Python.
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What is the purpose of the collections.ChainMap class?
A:
Chaining multiple dictionaries into a single view
B:
Sorting elements in a list
C:
Working with regular expressions
D:
Handling dates and times
Answer: A
The collections.ChainMap class in Python is used to chain multiple dictionaries into a single view, allowing you to access them as a single dictionary.
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Which module in Python provides functions for working with the file system, such as copying, moving, and deleting files?
A:
filesystem
B:
fileutils
C:
os.path
D:
shutil
Answer: D
The shutil module in Python provides functions for working with the file system, such as copying, moving, and deleting files.
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What is the purpose of the collections.deque class?
A:
Implementing queues and priority queues
B:
Sorting elements in a list
C:
Handling dates and times
D:
Creating a dictionary with default values
Answer: A
The collections.deque class in Python is used to implement double-ended queues, which can be used for efficiently adding and removing elements from both ends.
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