Python3.5安装Scrapy遇到的错误及解决方法

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最新推荐文章于 2024-11-30 15:57:32 发布

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在尝试使用`sudo pip3 install Scrapy`安装Scrapy时遇到pyasn1-modules版本过低的问题，通过`sudo pip3 install pyasn1-modules`升级后解决。若依然出错，可能需要卸载并重新安装OpenSSL，具体操作为删除相关dist-packages文件夹后再执行`sudo apt install --reinstall python-openssl`。

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安装步骤详见官方网址http://doc.scrapy.org/en/latest/intro/install.html

一、sudo pip3 install Scrapy出现错误

pyasn1-modules 0.2.4 has requirement pyasn1<0.5.0,>=0.4.1, but you'll have pyasn1 0.1.9 which is incompatible.
pyopenssl 19.0.0 has requirement cryptography>=2.3, but you'll have cryptography 1.2.3 which is incompatible.

pyasn1-modules版本过低

解决方法 sudo pip3 install pyasn1-modules

二、pip3 install pyasn1-modules 出现错误

Traceback (most recent call last):
  File "/usr/local/bin/pip3", line 7, in <module>
    from pip._internal import main
  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/__init__.py", line 40, in <module>
    from pip._internal.cli.autocompletion import autocomplete
  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/cli/autocompletion.py", line 8, in <module>
    from pip._internal.cli.main_parser import create_main_parser
  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/cli/main_parser.py", line 12, in <module>
    from pip._internal.commands import (
  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/commands/__init__.py", line 6, in <module>
    from pip._internal.commands.completion import CompletionCommand
  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/commands/completion.py", line 6, in <module>
    from pip._internal.cli.base_command import Command
  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/cli/base_command.py", line 20, in <module>
    from pip._internal.download import PipSession
  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/download.py", line 15, in <module>
    from pip._vendor import requests, six, urllib3
  File "/usr/local/lib/python3.5/dist-packages/pip/_vendor/requests/__init__.py", line 97, in <module>
    from pip._vendor.urllib3.contrib import pyopenssl
  File "/usr/local/lib/python3.5/dist-packages/pip/_vendor/urllib3/contrib/pyopenssl.py", line 46, in <module>
    import OpenSSL.SSL
  File "/usr/local/lib/python3.5/dist-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import crypto, SSL
  File "/usr/local/lib/python3.5/dist-packages/OpenSSL/SSL.py", line 194, in <module>
    if _lib.Cryptography_HAS_SSL_ST:
AttributeError: module 'lib' has no attribute 'Cryptography_HAS_SSL_ST'

解决方法：重新安装OpenSSL

sudo rm -rf /usr/local/lib/python3.5/dist-packages/OpenSSL/

sudo apt install --reinstall python-openssl