lab6_buraki_i_ziemniaki

import argparse
import sys
import os
import stat
from pwd import getpwuid
from datetime import datetime
parser = argparse.ArgumentParser()
parser.add_argument('-l',
                    dest='long',
                    action='store_true')
parser.add_argument('-L',
                    dest='owner',
                    action='store_true')
arg = parser.parse_args(['-l','-L'])
areArgTrue = 0
if arg.long:
    areArgTrue+=1
if arg.owner:
    areArgTrue+=1

def permissions_to_unix_name(st):
    is_dir = 'd' if stat.S_ISDIR(st.st_mode) else '-'
    dic = {'7':'rwx', '6' :'rw-', '5' : 'r-x', '4':'r--', '0': '---'}
    perm = str(oct(st.st_mode)[-3:])
    return is_dir + ''.join(dic.get(x,x) for x in perm)

if len(sys.argv) is 1+areArgTrue:
    cwd = os.getcwd()
else:
    for args in sys.argv[1:]:
        if args  not in ('-l',"-L"):
            cwd = args

for file in sorted(os.listdir(cwd)):
    if arg.long or arg.owner:
        info = os.stat(cwd+"/"+file)
    printstuff = file
    if arg.long:
        printstuff+=str(info.st_size).rjust(30-len(file))
        printstuff+=datetime.strftime(datetime.fromtimestamp(info.st_mtime),
                                      "%Y-%m-%d %H:%M:%S").rjust(30)
        printstuff+=permissions_to_unix_name(info).rjust(30)

    if arg.owner:
        printstuff+= str(getpwuid(info.st_uid).pw_name).rjust(20)
    print(printstuff)