counts code length in characters and lines for each argument

countsize.py

import sys
import os

filetypes = [".py", ".json"]

# usage: countsize.py [dir, ...]
# example: countsize.py F:\Desktop\project F:\Desktop\project\files

args = sys.argv
linesamount = 0
charsamount = 0
for i in args[1:]:
    for filename in os.listdir(i):
        f = os.path.join(i, filename)
        if os.path.isfile(f):
            _, ex = os.path.splitext(filename)
            if ex in filetypes:
                print(f"opened {f}, ", end="")
                file = open(f, "r").read()
                ca = len(file)
                la = file.count("\n")
                print(f"chars: {ca}; lines {la}")
                linesamount += la
                charsamount += ca

print("Lines written: ", linesamount)
print("Chars written: ", charsamount)