Parse a telemetry line

Write the codeEasy 2 stages

In "CSV row" you printed a reading as comma-separated values. Now Python One's ground software receives those lines and has to take them apart again: which part is the time, which the sensor, which the value.

2026-03-14T09:30:05Z,ENG-2,412.5,C

Split the line into its fields, then turn the value into a number you can calculate with.

Split the line at the commas and print each field with a label:

Time: 2026-03-14T09:30:05Z
Sensor: ENG-2
Value: 412.5
Unit: C

line.split(",") cuts the text at every comma and gives a list of the pieces. You pick a piece by its index, the same way as a character in a string: fields[0] is the first. Lists get a stage of their own later.

Print the four fields

Works for any reading

Finish stage 1 to unlock this stage.

split() gives text, so "412.5" + 273.15 would stop with a TypeError. Turn the value into a number, show it with its unit, and add the temperature in kelvin, with two decimal places:

Time: 2026-03-14T09:30:05Z
Sensor: ENG-2
Value: 412.5 C
In kelvin: 685.65 K

Kelvin is Celsius plus 273.15. The unit line goes: its unit now follows the value.

Use the value as a number

Works below zero too

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Hints

Methods find, count, replace and split

methods-find-replace-split.py

# Searching, counting, and splitting strings

# A snippet of mission log text
report = "Mars rover Curiosity landed. Curiosity is still active."

# .find() returns the index of the first match, or -1 if not found
position = report.find("Curiosity")
print("Curiosity first appears at index:", position)

missing = report.find("Voyager")
print("Voyager index:", missing)  # -1 means not found

# .count() returns how many times a substring appears
mentions = report.count("Curiosity")
print("Curiosity mentioned:", mentions, "times")

# .replace() can clean up or swap text - here we redact a name
public_report = report.replace("Curiosity", "[REDACTED]")
print(public_report)

# .split() breaks a string into a list, using a separator
crew_data = "Mark Watney,Botanist,Ares III,Sol 18"
fields = crew_data.split(",")
print("Fields:", fields)

# We can grab individual pieces by index
print("Name:", fields[0])
print("Role:", fields[1])

# Splitting on whitespace - no argument needed
sentence = "Houston we have a problem"
words = sentence.split()
print("Words:", words)

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:].