How to Generate Project Statistics Including Lines of Code and Complexity in Python

import os
from pathlib import Path

def count_lines_of_code(filepath):
    """Counts lines of code in a Python file, excluding blank lines and comments."""
    try:
        with open(filepath, 'r') as f:
            lines = f.readlines()
        code_lines = [line for line in lines if line.strip() and not line.strip().startswith('#')]
        return len(code_lines)
    except Exception:
        return 0

def compute_cyclomatic_complexity(code_text):
    """Estimates cyclomatic complexity by counting decision points."""
    decision_keywords = ['if ', 'elif ', 'for ', 'while ', 'and ', 'or ', 'except', 'with ']
    complexity = 1  # Base complexity
    for keyword in decision_keywords:
        complexity += code_text.count(keyword)
    return complexity

def generate_project_stats(project_dir):
    """Generates and prints statistics for all Python files in a directory."""
    stats = []
    for filepath in Path(project_dir).rglob('*.py'):
        nloc = count_lines_of_code(filepath)
        with open(filepath, 'r') as f:
            content = f.read()
        complexity = compute_cyclomatic_complexity(content)
        stats.append((filepath, nloc, complexity))
    
    if not stats:
        print("No Python files found.")
        return
    
    print(f"{'File':<40} {'LOC':<6} {'Complexity':<10}")
    print("-" * 58)
    total_loc = 0
    total_complexity = 0
    for fpath, nloc, complexity in stats:
        print(f"{str(fpath):<40} {nloc:<6} {complexity:<10}")
        total_loc += nloc
        total_complexity += complexity
    print("-" * 58)
    print(f"{'Total':<40} {total_loc:<6} {total_complexity:<10}")

if __name__ == "__main__":
    generate_project_stats(".")