关于多个步骤，无法在 PC 上安装 Scrapy答案

【问题标题】：Can't install Scrapy on PC regarding multiple steps关于多个步骤，无法在 PC 上安装 Scrapy
【发布时间】：2020-12-26 05:25:29
【问题描述】：

我正在尝试在 PC 上安装 scrapy，但不断收到错误消息。

我尝试安装 Microsoft Visual Studio 和其他类型的东西，但没有任何效果:(

 src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(2229): warning C4047: '=': '__pyx_t_11iocpsupport_HANDLE' differs in levels of indirection from 'HANDLE'
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(2377): warning C4022: 'CreateIoCompletionPort': pointer mismatch for actual parameter 1
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(2377): warning C4022: 'CreateIoCompletionPort': pointer mismatch for actual parameter 2
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(2377): warning C4047: '=': '__pyx_t_11iocpsupport_HANDLE' differs in levels of indirection from 'HANDLE'
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(2492): warning C4022: 'GetQueuedCompletionStatus': pointer mismatch for actual parameter 1
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(2838): warning C4022: 'PostQueuedCompletionStatus': pointer mismatch for actual parameter 1
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(2949): warning C4022: 'CloseHandle': pointer mismatch for actual parameter 1
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(3292): warning C4996: 'PyObject_AsReadBuffer': deprecated in 3.0
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(4932): warning C4996: 'PyObject_AsWriteBuffer': deprecated in 3.0
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(5149): warning C4996: 'PyObject_AsReadBuffer': deprecated in 3.0
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(5786): warning C4996: 'PyObject_AsWriteBuffer': deprecated in 3.0
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(6146): warning C4996: 'PyObject_AsWriteBuffer': deprecated in 3.0
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(6164): warning C4996: 'PyObject_AsWriteBuffer': deprecated in 3.0
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(6182): warning C4996: 'PyObject_AsWriteBuffer': deprecated in 3.0
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(6509): warning C4996: 'PyObject_AsReadBuffer': deprecated in 3.0
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(7614): error C2039: 'tp_print': is not a member of '_typeobject'
c:\users\emeron\appdata\local\programs\python\python39\include\cpython/object.h(193): note: see declaration of '_typeobject'
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(8421): warning C4996: '_PyUnicode_get_wstr_length': deprecated in 3.3
src/twisted/internet/iocpreactor/iocpsupport/iocpsupport.c(8437): warning C4996: '_PyUnicode_get_wstr_length': deprecated in 3.3
error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\BuildTools\\VC\\Tools\\MSVC\\14.28.29333\\bin\\HostX86\\x64\\cl.exe' failed with exit code 2

【问题讨论】：

您好，没有明确指示您使用的是什么确切版本的 scrappy 和 Visual Studio。这会给您带来麻烦，因为问题可能很简单，就像您使用不匹配的版本并且需要另一个版本的 scrappy（例如）在 VS 中使用。
这能回答你的问题吗？ Using VS Buildtools with pyclipper install error

标签： pip scrapy

【解决方案1】：

tp_print 方法已从 Python 3.8 的 API 中移除。错误“'tp_print': is not a member of '_typeobject'”表示代码适用于 Python

当前版本为 20.3.0 Twisted provides wheels 至 Python 3.7，因此您可能应该进一步降级。

PS。永远不要急于更新 Python 的主要版本，等到所有 3rd 方库都适应。

【讨论】：