Real JSON

Write the codeEasy 2 stages

In "API response", the launch arrived as a ready-made Python dict, with a comment saying the JSON had already been turned into one. That was a shortcut. A real API sends text, and the first thing any program does with it is turn that text into data.

Do that step yourself with the json module, then deal with a response that didn't arrive in one piece.

The prints from "API response" expect a dict, but response_text is text, and the program stops with TypeError: string indices must be integers. Turn the text into a dict with json.loads(), then add a line for crewed:

Launch: Lumen-3
Provider: JAXA
Status: Go
Crewed: False

import json is already at the top; replace launch = response_text with launch = json.loads(response_text).

Read the JSON

With the json module

Finish stage 1 to unlock this stage.

Three responses came in one batch, and the second was cut off in transfer. Loop over responses, print one line per launch, and print a message instead of crashing for the broken one:

Lumen-3 (JAXA): Go
Bad response: Unterminated string starting at
Kestrel-7 (ISRO): Hold

Catch json.JSONDecodeError; its msg attribute is the short reason, without the position.

Two launches and one message

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Hints

Import System Modules

import-system-modules.py

# A module is a toolbox someone else already built and tested for you

# Plain import brings in the whole module
import sys
import platform
import math

# from ... import brings in just one tool
from math import sqrt

# as gives a module a shorter nickname
import random as rng

# With a plain import: module name, a dot, then the tool
print("Python version:", platform.python_version())
print("Running on:", platform.system())
print("Python lives at:", sys.executable)

# math carries constants you would not want to type from memory
radius_km = 6371
print("Earth circumference:", round(2 * math.pi * radius_km), "km")

# sqrt arrived on its own, so it needs no dot in front
print("Square root of 9:", sqrt(9))

# rng is simply a nickname for random
print("Random sol of the Martian year:", rng.randint(1, 687))

Open the full example

script.py

PythonLn 1, Col 1Spaces: 4

Loading the Python environment…

Command-line arguments (sys.argv)

Separate arguments with commas. They're passed on every Run as sys.argv[1:].