"""
Count non-empty lines in a file, e.g. lines of code
"""
import sys

def count_lines(filename):
    """
    Count non-empty lines in file

    Args:
        filename: File to examine
    
    Return: Count of non-empty lines
    """
    with open(filename, "r") as file:
        count = 0
        for line in file:
            if line.strip() != "":
                count +=1
        return count



# filenames = ["turtle-examples.py", "scores-nolists.py"]
# 
# count = 0
# for filename in filenames:
#     count += count_lines(filename)
# print("Total lines:", count)


# import os
# filenames = os.listdir()
# 
# count = 0
# for filename in filenames:
#     if filename.endswith(".py"):
#         count += count_lines(filename)
# print("Total lines:", count)










if __name__ == "__main__":
    if len(sys.argv) == 1:
        # Check that at least one file is provided on the command line
        print("Usage: python line_counter.py <1 or more files>")
    else:
        print(sys.argv)
        count = 0
        for filename in sys.argv[1:]:
            count += count_lines(filename)
        print("Total lines:", count)