Move search matches for word processing formats

#!/usr/bin/env python3

#Dependencies: catdoc, Python 3.x
#on Ubuntu, you can install it with this: sudo apt-get install catdoc

import subprocess, shlex, glob, os, zipfile, re, html.parser, sys, shutil;

def files_with_word(word, from_dir, to_dir=None):
    from_dir=os.path.abspath(from_dir);
    if to_dir!=None:
        to_dir=os.path.abspath(to_dir);
    if not os.path.exists(from_dir):
        print("Your source path does not exist.");
        return;
    if to_dir!=None:
        if not os.path.exists(to_dir):
            yn="";
            while yn.lower() not in {"y", "yes", "n", "no"}:
                yn=input("Your destination path, " +to_dir+ ", does not exist. Create? (y/n) ");
            if yn.lower().strip() in {"y", "yes"}:
                os.makedirs(to_dir);
            else:
                print("Not created (and not used). No files will be moved.");
                to_dir=None;
    files_with_word_list=[];
    for x in glob.glob(os.path.join(from_dir, "*.doc")):
        command=shlex.split('catdoc -w "' + x + '"');
        file_text, err=subprocess.Popen(command, stdout=subprocess.PIPE).communicate();
        if word in str(file_text):
            files_with_word_list.append(x);
    for x in glob.glob(os.path.join(from_dir, "*.docx"))+glob.glob(os.path.join(from_dir, "*.odt")):
        z=zipfile.ZipFile(x);
        zippath="word/document.xml";
        if x.endswith("odt")==True:
            zippath="content.xml";
        file_text=z.read(zippath).decode();
        file_text=re.sub(r"<[^>]*>", r"", file_text)[1:];
        file_text=html.parser.HTMLParser().unescape(file_text);
        #print(file_text); #This is for debugging purposes.
        if word in file_text:
            files_with_word_list.append(x);
    if len(files_with_word_list)==0:
        print("No matches found.");
    else:
        if to_dir==None:
            print("\n".join(files_with_word_list).strip());
    if to_dir!=None:
        for x in files_with_word_list:
            #os.remove(x);
            xfilename=x.split(os.sep)[-1];
            to_x=os.path.join(to_dir, xfilename);
            print("Found " + x + " moving to " + to_x);
            shutil.move(x, to_x);

files_with_word(word="test", from_dir="", to_dir="test/backup");