Exam 350-401 topic 1 question 603 discussion

reference: https://www.section.io/engineering-education/storing-data-in-python-using-json-module/

"json.dump()"- converts a Python dictionary into a JSON file. "json.dumpS()"- converts a Python dictionary into a JSON string. "json.load()"- converts a JSON file into a Python object. This makes C and D incorrect. B is also incorrect because it takes the entire Python object and converts it into a string, not even a JSON-formatted string.

A is correct

A is correct

if is answers is "OutFile.Close()", then OutFile = open("devices.json","w") json.dump(Devices, OutFile) OutFile.Close() Traceback (most recent call last): File "main.py", line 14, in <module> OutFile.Close() AttributeError: '_io.TextIOWrapper' object has no attribute 'Close' ** Process exited - Return Code: 1 ** Press Enter to exit terminal

Tested all 4 of them on Visual Studio Code: A: works, right answer B: does not work properly, it just copies the data without making sure the formatting is good for json files C: creates an empty file D: errors out, the syntax is not right

I will go with A considering the differences between json.dump and json.dumps https://www.geeksforgeeks.org/python-difference-between-json-dump-and-json-dumps/

the main difference is that outfile.write(str(devices)) writes the string representation of the data directly to the file, while outfile.dump(devices, outfile) uses serialization to write the data in a specific format (e.g., JSON, YAML) to the file, preserving its original data structure and types

"Devices" is already a dict, which prompts dump as the tool to write a file.

I got it tested - the correct one is B. Explanation A: Incorrect, there is no such a thing like json.dumb - there is a missing 's' -> dumbs B: Correct, worked fine on my py script. str(Devices) is doig the same thing as json.dumbs in this case - it is casting dict to str type C: Incorrect, the outcomes are not put into a file. It would have worked if it was OutFile.write(json.dumbs(Devices)) D: Incorrect, not only are we not putting anything into a file but it is also trting to change dicto to a dict which would cause an error

Choosing A. https://www.section.io/engineering-education/storing-data-in-python-using-json-module/

Option A didn't work as you can see >>> import json >>> devices = {'switch':'blah', ... 'router':'ddd' ... } >>> outfile = open("devices.json",w) Traceback (most recent call last): File "<stdin>", line 1, in <module> NameError: name 'w' is not defined >>> with open("devices.json","w") as outfile: ... json.dumps(devices) File "<stdin>", line 2 json.dumps(devices) ^ IndentationError: expected an indented block >>> with open("devices.json","w") as outfile: ... json.dumps(devices) ... '{"switch": "blah", "router": "ddd"}' >>>

Guys, what version of Python they used in the scripts?

A is correct, the same configuration can be found in multiple examples here: https://www.geeksforgeeks.org/json-dump-in-python/

https://www.section.io/engineering-education/storing-data-in-python-using-json-module/#:~:text=Using%20json.,-dumps()&text=dumps()%20can%20be%20used,object%20into%20a%20JSON%20string.&text=dumps(data)-,The%20json.,be%20converted%20into%20JSON%20string.

I'll go for A