python 安装模块报错 Exception: Traceback (most recent call last): File "/usr/share/python-wheels/urllib3-1.22-py2.py3-none-any.whl/urllib3/response.py", line 302, in _error_catcher yield File "/usr/share/python-whe
说一下解决办法 为什么pip会很慢? pip是一个非常流行的python包管理工具,在命令行中只需要输入pip install 你要安装的库,就可以自动安装第三方库。然而pip是从pypi中下载库文件的,pypi是python官方第三方库的仓库,它用的是国外的服务器,下载速度自然很慢。 所以,慢是因为要去国外服务器上下载,国内的访问速度你懂...
File "D:\anaconda3\lib\site-packages\pip\_vendor\urllib3\response.py", line 425, in _error_catcher yield File "D:\anaconda3\lib\site-packages\pip\_vendor\urllib3\response.py", line 507, in read data = self._fp.read(amt) if not fp_closed else b"" File "D:\anaconda3\lib\site-...
报错信息: ERROR: Exception: Traceback (most recent call last): File “A:\ProgramData\Anaconda3\envs\gee\lib\site-packages\pip_vendor\urllib3\response.py”, line 435, in _error_catcher yield File “A:\ProgramData\Anaconda3\envs\gee\lib\site-packages\pip_vendor\urllib3\response.py”, line...
File "d:\soft\python3.7\lib\site-packages\pip\_vendor\urllib3\response.py", line 331, in _error_catcher yield File "d:\soft\python3.7\lib\site-packages\pip\_vendor\urllib3\response.py", line 413, in read data = self._fp.read(amt) ...
ERROR: Exception: Traceback (most recent call last): File "d:\xunihuanjing\first\lib\site-packages\pip\_vendor\urllib3\response.py", line 425, in _error_catcher yield File "d:\xunihuanjing\first\lib\site-packages\pip\_vendor\urllib3\response.py", line 507, in read data = self._fp...
ERROR: Exception: Traceback (most recent call last): File "C:\Users\Admin\AppData\Local\Programs\Python\Python311\Lib\site-packages\pip\_vendor\urllib3\response.py", line 438, in _error_catcher yield File "C:\Users\Admin\AppData\Local\Programs\Python\Python311\Lib\site-packages\pip\_vend...
File "c:\users\administrator\appdata\local\programs\python\python37\lib\site-packages\pip\_vendor\urllib3\response.py", line 425, in _error_catcher yield File "c:\users\administrator\appdata\local\programs\python\python37\lib\site-packages\pip\_vendor\urllib3\response.py", line 507, in rea...
except IndexError: ... print fetcher(x,-1) ... print "continuing" ... >>> catcher() e continuing 可以看到从异常中恢复并继续执行。 try/finally: 无论异常是否发生,都执行清理行为(发生异常时程序也会终端,只不过会执行finally后的代码) >>> try: ... fetcher(x,4) ... finally: ... ...
如果在运行该程序时输入的第2个参数是0,将发生除0异常, Python将调用 ArithmeticError对应的 except块处理该异常; 如果在程序运行时出现其他异常,该异常对象总是 Exception类或其子类的实例,Python将调用 Exception对应的 except块处理该异常。 上面程序中的3种异常,都是非常常见的运行时异常,读者应该记住这些异常,并...