copyx.py

import os
import shutil

src_dir  = os.curdir
dst_dir = os.path.join(os.curdir, "dest")
filenames = os.path.join(os.curdir, "filenames.txt")

def get_filenames():
    lines = []
    with open(filenames) as file:
        for line in file:
            line = line.strip()
            lines.append(line)    
    return lines

def main():
    listed = get_filenames()
    all = os.listdir(src_dir)
    for file in all:
        if file in listed:
            src_file = os.path.join(src_dir, file)
            shutil.copy(src_file, dst_dir)
            print(file)

if __name__ == "__main__":
    main()