[Solution] pyinstaller cannot package the module gfpgan

Record the solution to the problem.

【问题描述】：
python已经安装docx2pdf模块，使用pyinstaller打包脚本时，无报错，顺利生成exe执行文件，
但exe使用时报错无法运行。

【报错信息】：
from gfpgan import GFPGANer
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "PyInstaller\loader\pyimod02_importers.py", line 385, in exec_module
  File "gfpgan\__init__.py", line 2, in <module>
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "PyInstaller\loader\pyimod02_importers.py", line 385, in exec_module
  File "gfpgan\archs\__init__.py", line 8, in <module>
  File "gfpgan\archs\__init__.py", line 8, in <listcomp>
  File "basicsr\utils\misc.py", line 74, in _scandir
FileNotFoundError: [WinError 3] 系统找不到指定的路径。: 'G:\\PycharmProject\\zhubo\\_internal\\_z\\t\\_MEI139762\\gfpgan\\archs'
[7400] Failed to execute script 'main' due to unhandled exception!

【解决方法】：
1、找到Pyinstaller的hooks文件目录，如：
C:\Users\A\AppData\Local\Programs\Python\Python39\Lib\site-packages\PyInstaller\hooks
2、添加文件hook-docx2pdf.py，内容为：
from PyInstaller.utils.hooks import collect_all
datas, binaries, hiddenimports = collect_all('gfpgan')

【备注】：
简单点说就是pyinstaller打包的时候，由于没有这个hook文件，
实际上并没有将对应的docx2pdf模块打包到exe程序中，需要添加hook文件，解决这个问题。