我用Pyhton3.7来安装一个模块的时候，当执行命令：pip install tinyscript，结果，报了如下错误：
During handling of the above exception, another exception occurred
中文翻译
在处理上述异常期间，发生了另一个异常
具体报错如下：
|█ | 337kB 6.2kB/s eta 0:23:56ERROR: Exception:
Traceback (most recent call last):
File "f:\python3.7.0\lib\site-packages\pip\_vendor\urllib3\response.py", line 425, in _error_catcher
yield
File "f:\python3.7.0\lib\site-packages\pip\_vendor\urllib3\response.py", line 507, in read
data = self._fp.read(amt) if not fp_closed else b""
File "f:\python3.7.0\lib\site-packages\pip\_vendor\cachecontrol\filewrapper.py", line 62, in read
data = self.__fp.read(amt)
File "f:\python3.7.0\lib\http\client.py", line 447, in read
n = self.readinto(b)
File "f:\python3.7.0\lib\http\client.py", line 491, in readinto
n = self.fp.readinto(b)
File "f:\python3.7.0\lib\socket.py", line 589, in readinto
return self._sock.recv_into(b)
File "f:\python3.7.0\lib\ssl.py", line 1049, in recv_into
return self.read(nbytes, buffer)
File "f:\python3.7.0\lib\ssl.py", line 908, in read
return self._sslobj.read(len, buffer)
socket.timeout: The read operation timed out
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "f:\python3.7.0\lib\site-packages\pip\_internal\cli\base_command.py", line 153, in _main
status = self.run(options, args)
File "f:\python3.7.0\lib\site-packages\pip\_internal\commands\install.py", line 382, in run
resolver.resolve(requirement_set)
File "f:\python3.7.0\lib\site-packages\pip\_internal\legacy_resolve.py", line 201, in resolve
self._resolve_one(requirement_set, req)
File "f:\python3.7.0\lib\site-packages\pip\_internal\legacy_resolve.py", line 365, in _resolve_one
abstract_dist = self._get_abstract_dist_for(req_to_install)
File "f:\python3.7.0\lib\site-packages\pip\_internal\legacy_resolve.py", line 313, in _get_abstract_dist_for
req, self.session, self.finder, self.require_hashes
File "f:\python3.7.0\lib\site-packages\pip\_internal\operations\prepare.py", line 194, in prepare_linked_requirement
progress_bar=self.progress_bar
File "f:\python3.7.0\lib\site-packages\pip\_internal\download.py", line 465, in unpack_url
progress_bar=progress_bar
File "f:\python3.7.0\lib\site-packages\pip\_internal\download.py", line 316, in unpack_http_url
progress_bar)
File "f:\python3.7.0\lib\site-packages\pip\_internal\download.py", line 551, in _download_http_url
_download_url(resp, link, content_file, hashes, progress_bar)
File "f:\python3.7.0\lib\site-packages\pip\_internal\download.py", line 253, in _download_url
hashes.check_against_chunks(downloaded_chunks)
File "f:\python3.7.0\lib\site-packages\pip\_internal\utils\hashes.py", line 80, in check_against_chunks
for chunk in chunks:
File "f:\python3.7.0\lib\site-packages\pip\_internal\download.py", line 223, in written_chunks
for chunk in chunks:
File "f:\python3.7.0\lib\site-packages\pip\_internal\utils\ui.py", line 160, in iter
for x in it:
File "f:\python3.7.0\lib\site-packages\pip\_internal\download.py", line 212, in resp_read
decode_content=False):
File "f:\python3.7.0\lib\site-packages\pip\_vendor\urllib3\response.py", line 564, in stream
data = self.read(amt=amt, decode_content=decode_content)
File "f:\python3.7.0\lib\site-packages\pip\_vendor\urllib3\response.py", line 529, in read
raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
File "f:\python3.7.0\lib\contextlib.py", line 130, in __exit__
self.gen.throw(type, value, traceback)
File "f:\python3.7.0\lib\site-packages\pip\_vendor\urllib3\response.py", line 430, in _error_catcher
raise ReadTimeoutError(self._pool, None, "Read timed out.")
pip._vendor.urllib3.exceptions.ReadTimeoutError: HTTPSConnectionPool(host='files.pythonhosted.org', port=443): Read timed out.
解决方法
在大量访问网页时，有可能出现这种报错。
出现以上类似的报错，都是由于频繁访问网站或请求造成的。往往网络太卡，例如：下载速度几kb每秒，太慢了，恰好下载的文件又太大就很容易出现这种情况。
第一种：设置超时时间
pip --default-timeout=100 install -U tinyscript
第二种：更换国内源
pip install tinyscript -i http://pypi.douban.com/simple --trusted-host=pypi.douban.com
