Mac10.15.4下pip install scrapy报错

pip3 install scrapy
Collecting scrapy
  Using cached Scrapy-2.1.0-py2.py3-none-any.whl (239 kB)
Collecting pyOpenSSL>=16.2.0
  Downloading pyOpenSSL-19.1.0-py2.py3-none-any.whl (53 kB)
     |████████████████████████████████| 53 kB 38 kB/s 
Collecting cryptography>=2.0
  Downloading cryptography-2.9.2-cp35-abi3-macosx_10_9_x86_64.whl (1.8 MB)
     |████████████████████████████████| 1.8 MB 7.3 kB/s 
Collecting Twisted>=17.9.0
  Downloading Twisted-20.3.0.tar.bz2 (3.1 MB)
     |█████▉                          | 573 kB 6.5 kB/s eta 0:06:36ERROR: 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 425, in _error_catcher
    yield
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_vendor/urllib3/response.py", line 507, in read
    data = self._fp.read(amt) if not fp_closed else b""
  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/cli/req_command.py", line 185, in wrapper
    return func(self, options, args)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/commands/install.py", line 332, in run
    requirement_set = resolver.resolve(
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/resolution/legacy/resolver.py", line 179, in resolve
    discovered_reqs.extend(self._resolve_one(requirement_set, req))
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/resolution/legacy/resolver.py", line 362, 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/resolution/legacy/resolver.py", line 314, in _get_abstract_dist_for
    abstract_dist = self.preparer.prepare_linked_requirement(req)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/operations/prepare.py", line 467, in prepare_linked_requirement
    local_file = unpack_url(
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/operations/prepare.py", line 255, in unpack_url
    file = get_http_url(
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/operations/prepare.py", line 129, in get_http_url
    from_path, content_type = _download_http_url(
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/operations/prepare.py", line 281, in _download_http_url
    for chunk in download.chunks:
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/cli/progress_bars.py", line 166, in iter
    for x in it:
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_internal/network/utils.py", line 15, in response_chunks
    for chunk in response.raw.stream(
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pip/_vendor/urllib3/response.py", line 564, 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 529, 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 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：

1、pip install --upgrade pip

2、sudo -H pip install --upgrade incremental

3、sudo -H  pip install scrapy==1.5.0

macsn@MacsndeMac ~ % sudo -H  pip install scrapy==1.5.0                                                          
Collecting scrapy==1.5.0
  Downloading Scrapy-1.5.0-py2.py3-none-any.whl (251 kB)
     |████████████████████████████████| 251 kB 3.9 kB/s 
........
Installing collected packages: scrapy
  Attempting uninstall: scrapy
    Found existing installation: Scrapy 2.1.0
    Uninstalling Scrapy-2.1.0:
      Successfully uninstalled Scrapy-2.1.0
Successfully installed scrapy-1.5.0