python3.8安装pip-MAC本安装python3.8后，pip3命令无法更新问题

开始学习python，因为MAC本自带2.7，版本较低，下载了python3.8，安装后按照之前博文的方法进行了升级。目前敲入python, 直接进入了python3.8.

但是发现pip3命令无法更新。执行pip3 install --upgrade pip时，报如下错误，蒙头晚上查了一圈方法，折腾很久。

Collecting pip

Downloading https://files.pythonhosted.org/packages/54/0c/d01aa759fdc501a58f431eb594a17495f15b88da142ce14b5845662c13f3/pip-20.0.2-py2.py3-none-any.whl (1.4MB)

|███████████████████▋ | 880kB 7.4kB/s eta 0:01:16ERROR: Exception:

Traceback (most recent call last):

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_vendor/urllib3/response.py", line 397, in _error_catcher

yield

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_vendor/urllib3/response.py", line 479, in read

data = self._fp.read(amt)

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_vendor/cachecontrol/filewrapper.py", line 62, in read

data = self.__fp.read(amt)

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/http/client.py", line 454, in read

n = self.readinto(b)

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/http/client.py", line 498, in readinto

n = self.fp.readinto(b)

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/socket.py", line 669, in readinto

return self._sock.recv_into(b)

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/ssl.py", line 1241, in recv_into

return self.read(nbytes, buffer)

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/ssl.py", line 1099, 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 "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/cli/base_command.py", line 188, in main

status = self.run(options, args)

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/commands/install.py", line 345, in run

resolver.resolve(requirement_set)

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/legacy_resolve.py", line 196, in resolve

self._resolve_one(requirement_set, req)

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/legacy_resolve.py", line 359, in _resolve_one

abstract_dist = self._get_abstract_dist_for(req_to_install)

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/legacy_resolve.py", line 305, in _get_abstract_dist_for

abstract_dist = self.preparer.prepare_linked_requirement(

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/operations/prepare.py", line 195, in prepare_linked_requirement

unpack_url(

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/download.py", line 1058, in unpack_url

unpack_http_url(

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/download.py", line 920, in unpack_http_url

from_path, content_type = _download_http_url(link,

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/download.py", line 1152, in _download_http_url

_download_url(resp, link, content_file, hashes, progress_bar)

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/download.py", line 861, in _download_url

hashes.check_against_chunks(downloaded_chunks)

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/utils/hashes.py", line 75, in check_against_chunks

for chunk in chunks:

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/download.py", line 829, in written_chunks

for chunk in chunks:

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/utils/ui.py", line 156, in iter

for x in it:

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/download.py", line 794, in resp_read

for chunk in resp.raw.stream(

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_vendor/urllib3/response.py", line 531, in stream

data = self.read(amt=amt, decode_content=decode_content)

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_vendor/urllib3/response.py", line 496, in read

raise IncompleteRead(self._fp_bytes_read, self.length_remaining)

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/contextlib.py", line 131, in __exit__

self.gen.throw(type, value, traceback)

File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_vendor/urllib3/response.py", line 402, 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.

WARNING: You are using pip version 19.2.3, however version 20.0.2 is available.

You should consider upgrading via the 'pip install --upgrade pip' command.

--------------------------------------------------------------------------------------------------

因为试了网上很多方法都没用，问题就是没关注到文字标黑的部分，别人的问题都跟自己的不一样，需要仔细看自己的报错，超时超时。马上将升级命令换成

pip3 --default-timeout=1000 install --upgrade pip （时间可以从小到打自行设定，一般500就够了）

问题瞬间解决，总结：真心不能盲目着急，仔细查看问题所在，是必修之路。记录在此，点点滴滴，总会进步。

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python3.8安装pip-MAC本安装python3.8后，pip3命令无法更新问题

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