[Solved] You run this code on your Raspberry Pi but the CSV file remains empty:import csv file = open('log.csv', 'w') writer = csv.writer(file) writer.writerow(['Date', 'Value']) file.... | Raspberry Pi

Raspberry Pi - Data Logging and Databases

You run this code on your Raspberry Pi but the CSV file remains empty:

import csv
file = open('log.csv', 'w')
writer = csv.writer(file)
writer.writerow(['Date', 'Value'])
file.close()

What is the likely problem?

AThe file was not closed properly

BThe newline parameter is missing in open() causing blank lines

CThe file was not opened in append mode

DThe writerow method was not called correctly

Step-by-Step Solution

Solution:

Step 1: Check file opening and writing
File is opened in write mode and writerow is called correctly.
Step 2: Identify missing newline='' causing blank lines on Windows/Linux
Without newline='', csv.writer may write extra blank lines or cause issues making file appear empty.
Final Answer:
The newline parameter is missing in open() causing blank lines -> Option B
Quick Check:
Use newline='' to avoid blank lines in CSV [OK]

Quick Trick: Always use newline='' when opening CSV files for writing [OK]

Common Mistakes:

MISTAKES

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