Logging and log analysis in Drone Programming - Mini Project: Build & Apply

Logging and Log Analysis with Drone Programming

📖 Scenario: You are working on a drone control system. To keep track of the drone's activities and detect problems, you need to create logs that record important events and then analyze these logs to find any errors.

🎯 Goal: Build a simple logging system that records drone events with their severity levels, then filter and display only the error logs for quick analysis.

📋 What You'll Learn

Create a list of log entries with exact event messages and severity levels

Add a variable to specify the severity level to filter logs

Use a loop or comprehension to select logs matching the filter severity

Print the filtered error logs exactly as specified

💡 Why This Matters

🌍 Real World

Logging is essential in drone systems to monitor flight status and detect issues early. Filtering logs helps engineers focus on critical problems quickly.

💼 Career

DevOps and site reliability engineers use logging and log analysis daily to maintain system health and troubleshoot errors efficiently.

1

Create the initial log entries list

Create a list called logs with these exact entries as dictionaries: {'event': 'Takeoff initiated', 'level': 'INFO'}, {'event': 'Altitude reached 100m', 'level': 'INFO'}, {'event': 'Battery low', 'level': 'WARNING'}, {'event': 'Motor failure detected', 'level': 'ERROR'}, {'event': 'Landing completed', 'level': 'INFO'}

Drone Programming

# Create the list of logs with exact entries
# Your code here

Need a hint?

Use a list of dictionaries. Each dictionary must have keys 'event' and 'level' with exact string values.

2

Add a filter level variable

Create a variable called filter_level and set it to the string 'ERROR' to specify which log level to filter.

Drone Programming

logs = [
    {'event': 'Takeoff initiated', 'level': 'INFO'},
    {'event': 'Altitude reached 100m', 'level': 'INFO'},
    {'event': 'Battery low', 'level': 'WARNING'},
    {'event': 'Motor failure detected', 'level': 'ERROR'},
    {'event': 'Landing completed', 'level': 'INFO'}
]
# Create filter_level variable and set it to 'ERROR'
# Your code here

Need a hint?

Just assign the string 'ERROR' to the variable filter_level.

3

Filter logs by severity level

Create a list called error_logs that contains only the entries from logs where the 'level' matches the filter_level. Use a list comprehension.

Drone Programming

logs = [
    {'event': 'Takeoff initiated', 'level': 'INFO'},
    {'event': 'Altitude reached 100m', 'level': 'INFO'},
    {'event': 'Battery low', 'level': 'WARNING'},
    {'event': 'Motor failure detected', 'level': 'ERROR'},
    {'event': 'Landing completed', 'level': 'INFO'}
]
filter_level = 'ERROR'
# Create error_logs list with entries where level equals filter_level
# Your code here

Need a hint?

Use a list comprehension to select logs where log['level'] == filter_level.

4

Print the filtered error logs

Use a for loop to print each dictionary in error_logs exactly as it appears.

Drone Programming

logs = [
    {'event': 'Takeoff initiated', 'level': 'INFO'},
    {'event': 'Altitude reached 100m', 'level': 'INFO'},
    {'event': 'Battery low', 'level': 'WARNING'},
    {'event': 'Motor failure detected', 'level': 'ERROR'},
    {'event': 'Landing completed', 'level': 'INFO'}
]
filter_level = 'ERROR'
error_logs = [log for log in logs if log['level'] == filter_level]
# Print each log in error_logs
# Your code here

Need a hint?

Use a for loop to print each dictionary in error_logs.