请问在上一次运行之前都是正常的，然后再次运行就出现如图错误时

Question

C:\PY\PRJ\venv\Scripts\python.exe C:/PY/PRJ/venv/12.py
Traceback (most recent call last):
File "C:\PY\PRJ\venv\12.py", line 4, in
from pywinauto.application import Application
File "C:\PY\PRJ\venv\lib\site-packages\pywinauto_init.py", line 89, in
from . import findwindows
File "C:\PY\PRJ\venv\lib\site-packages\pywinauto\findwindows.py", line 42, in
from . import controls
File "C:\PY\PRJ\venv\lib\site-packages\pywinauto\controls_init.py", line 37, in
from . import uia_controls
File "C:\PY\PRJ\venv\lib\site-packages\pywinauto\controls\uia_controls.py", line 43, in
from . import win32_controls
File "C:\PY\PRJ\venv\lib\site-packages\pywinauto\controls\win32_controls.py", line 41, in
from . import hwndwrapper
File "C:\PY\PRJ\venv\lib\site-packages\pywinauto\controls\hwndwrapper.py", line 39, in
import copy
File "C:\PY\PRJ\venv\copy.py", line 6, in
app = Application(backend='win32').connect(title_re="演示软件", class_name="Qt5QWindowIcon")
File "C:\PY\PRJ\venv\lib\site-packages\pywinauto\application.py", line 905, in init
raise ValueError('Backend "{0}" is not registered!'.format(backend))
ValueError: Backend "win32" is not registered!

Process finished with exit code 1

Answer 1

估计是你两次运行的环境不一样导致；

看情况，是像没有安装对应的库导致