A command-line tool for parsing and visualizing log files. Quickly summarize log levels, view colorized output, or filter for errors — all from the terminal.

• Analyze — counts the total number of INFO, WARNING, and ERROR entries in a log file
• View — prints the full log file with color-coded lines by log level
• Errors — filters and displays only ERROR lines

Output is color-coded using colorama:

• Python 3.6+
• colorama

Install the dependency with:

pip install colorama

python main.py <command> <file>

Counts and displays a summary of each log level found in the file.

python main.py analyze path/to/logfile.log

Example output:

Log Summary:
INFO: 42
WARNING: 7
ERROR: 3

Prints the entire log file with each line color-coded by its log level. Lines with no recognized level are printed in the default terminal color.

python main.py view path/to/logfile.log

Filters the log file and prints only lines containing ERROR.

python main.py errors path/to/logfile.log

The tool detects log levels by scanning each line for the keywords INFO, WARNING, or ERROR. It is compatible with common log formats such as:

2024-01-15 10:23:01 INFO Application started
2024-01-15 10:23:45 WARNING Disk usage above 80%
2024-01-15 10:24:12 ERROR Failed to connect to database

No specific format is enforced — any line containing one of the three keywords will be recognized.

• analyzer.py contains debug print statements that log the file path and each line as it is read. These can be removed for production use.
• If the specified file does not exist, all commands will print an error message and exit gracefully.