#funcs
import pip._internal as pip
def from_pack(file):
    file = open(file)
    packages = set(file.read().split('\n')) - set(package.key for package in pip.get_installed_distributions())
    file.close()
    for package in packages:
        pip.main(['install',package])

def to_pack(file):
    file = open(file,'w')
    s = '\n'.join(map(lambda p: p.key,pip.get_installed_distributions()))
    file.write(s)
    file.close()
#arguments
if __name__ == "__main__":
    import argparse
    parser = argparse.ArgumentParser()
    parser.add_argument("mode",metavar = "action",help="what you wanna do")
    parser.add_argument("path",metavar = "dir",help="fullpath to pack")
    args = parser.parse_args()
    if args.mode == "to_pack":
        to_pack(args.path)
    elif args.mode == "from_pack":
        from_pack(args.path)