python3中启动 uiautomator2viewer时报错解决办法
事先说明：我电脑里同时了安装了 python2和python3，启动对应版本时分别带上版本号，如何设置共存请参考：python2与python3共存
打开命令窗口，启动weditor : python3 -m weditor，报如下错误：
1 C:\Windows\system32>python3 -m weditor 2 Traceback (most recent call last): 3 File "C:\Program Files\Python37\lib\runpy.py", line 193, in _run_module_as_main 4 "__main__", mod_spec) 5 File "C:\Program Files\Python37\lib\runpy.py", line 85, in _run_code 6 exec(code, run_globals) 7 File "C:\Program Files\Python37\lib\site-packages\weditor\__main__.py", line 19, in <module> 8 import StringIO 9 ModuleNotFoundError: No module named 'StringIO'
查阅了一下别人博客说明，在Python3中没有直接通过 import StringIO的方法（在python2中使用），正确的使用方法为 from io import StringIO,根据上面错误输出中的解决办法，到 C:\Program Files\Python37\Lib\site-packages\weditor 将 “__main__.py” 文件中第19行修改为 from io import StringIO (我是重新新增一行，把原语句注释掉）
再次运行 Python3 -m weditor 时，还是报错，不过是报另外一个错，说明上面的问题已经解决，下面来看看第二个错是什么样的，提示没有 cv2模块
1 C:\Windows\system32>python3 -m weditor 2 Traceback (most recent call last): 3 File "C:\Program Files\Python37\lib\runpy.py", line 193, in _run_module_as_main 4 "__main__", mod_spec) 5 File "C:\Program Files\Python37\lib\runpy.py", line 85, in _run_code 6 exec(code, run_globals) 7 File "C:\Program Files\Python37\lib\site-packages\weditor\__main__.py", line 24, in <module> 8 import atx 9 File "C:\Program Files\Python37\lib\site-packages\atx\__init__.py", line 22, in <module> 10 from atx.drivers import Pattern, Bounds, ImageCrop 11 File "C:\Program Files\Python37\lib\site-packages\atx\drivers\__init__.py", line 9, in <module> 12 from atx import imutils 13 File "C:\Program Files\Python37\lib\site-packages\atx\imutils.py", line 16, in <module> 14 import cv2 15 ModuleNotFoundError: No module named 'cv2'
那就再安装 cv2模块，不过这个模块的安装方法跟其它模块有点不一样，不能直接通过名字的形式去猜测安装方法，一般人都是直接 pip3 install cv2，结果会发现这个行不通，通过查阅其它人博客，该cv2 模块的正确安装方法是 pip3 install opencv-python
1 C:\Windows\system32>pip3 install opencv-python 2 Collecting opencv-python 3 Downloading https://files.pythonhosted.org/packages/82/de/32bdf7b20f9d08008dda2073a48141ab4ad829deaca7aa660e9c64d02dae/opencv_python-3.4.3.18-cp37-cp37m-win_amd64.whl (33.8MB) 4 100% |████████████████████████████████| 33.8MB 280kB/s 5 Requirement already satisfied: numpy>=1.14.5 in c:\program files\python37\lib\site-packages (from opencv-python) (1.15.1) 6 Installing collected packages: opencv-python 7 Successfully installed opencv-python-3.4.3.18
再次启动 python3 -m weditor，网页版的 uiautomatorviewer 正常打开
1 C:\Windows\system32>python3 -m weditor 2 listen port 17310 3 [I 180910 10:29:11 web:2162] 304 GET /api/v1/version (::1) 0.00ms 4 [I 180910 10:29:15 web:2162] 200 POST /api/v1/connect (::1) 828.14ms 5 SN 55115076-099d-4f9c-b11a-8ada31375c5e 6 [I 180910 10:29:29 web:2162] 200 GET /api/v1/devices/55115076-099d-4f9c-b11a-8ada31375c5e/screenshot (::1) 1092.94ms 7 [I 180910 10:29:30 web:2162] 200 GET /api/v1/devices/55115076-099d-4f9c-b11a-8ada31375c5e/hierarchy (::1) 724.49ms
