[Solved] This Python code is meant to log sensor data but fails to save anything. What is the error? f = open('data.log', 'w') f.write('Humidity: 45%') f.close() | Raspberry Pi

Raspberry Pi - Data Logging and Databases

This Python code is meant to log sensor data but fails to save anything. What is the error?

f = open('data.log', 'w')
f.write('Humidity: 45%')
f.close()

AThe file mode 'w' erases previous logs each run.

BMissing newline character causes no data saved.

CFile is not closed properly.

DThe write method syntax is incorrect.

Step-by-Step Solution

Solution:

Step 1: Understand file mode 'w' behavior
Mode 'w' overwrites the file, erasing previous logs each time.
Step 2: Identify why logs seem missing
Each run deletes old data, so only last run's data remains, seeming like no logs.
Final Answer:
The file mode 'w' erases previous logs each run. -> Option A
Quick Check:
'w' mode overwrites file [OK]

Quick Trick: Use 'a' mode to keep old logs, not 'w' [OK]

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This Python code is meant to log sensor data but fails to save anything. What is the error?