为什么我在安装 DLlib 时"check the logs for full command output"收到此错误？

Question

我试图在vertual studio代码上安装dlib，但显示以下错误：

Running setup.py install for dlib ... error
ERROR: Command errored out with exit status 1:
command: 'c:usersacerappdatalocalprogramspythonpython39python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\Users\ACER\AppData\Local\Temp\pip-install-iotpp637\dlib_cbdb8998ebb54dee8cad48a70a8a0f3c\setup.py'"'"'; __file__='"'"'C:\Users\ACER\AppData\Local\Temp\pip-install-iotpp637\dlib_cbdb8998ebb54dee8cad48a70a8a0f3c\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'rn'"'"', '"'"'n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:UsersACERAppDataLocalTemppip-record-qzdzy48qinstall-record.txt' --single-version-externally-managed --compile --install-headers 'c:usersacerappdatalocalprogramspythonpython39Includedlib'
cwd: C:UsersACERAppDataLocalTemppip-install-iotpp637dlib_cbdb8998ebb54dee8cad48a70a8a0f3c   
Complete output (60 lines):
running install
running build
running build_py
package init file 'toolspythondlib__init__.py' not found (or not a regular file)
running build_ext
Building extension for Python 3.9.0 (tags/v3.9.0:9cf6752, Oct  5 2020, 15:34:40) [MSC v.1927 64 bit (AMD64)]
Invoking CMake setup: 'cmake C:UsersACERAppDataLocalTemppip-install-iotpp637dlib_cbdb8998ebb54dee8cad48a70a8a0f3ctoolspython -DCMAKE_LIBRARY_OUTPUT_DIRECTORY=C:UsersACERAppDataLocalTemppip-install-iotpp637dlib_cbdb8998ebb54dee8cad48a70a8a0f3cbuildlib.win-amd64-3.9 -DPYTHON_EXECUTABLE=c:usersacerappdatalocalprogramspythonpython39python.exe -DCMAKE_LIBRARY_OUTPUT_DIRECTORY_RELEASE=C:UsersACERAppDataLocalTemppip-install-iotpp637dlib_cbdb8998ebb54dee8cad48a70a8a0f3cbuildlib.win-amd64-3.9 -A x64'
-- Building for: NMake Makefiles
CMake Error at CMakeLists.txt:5 (message):

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

You must use Visual Studio to build a python extension on windows.  If you
are getting this error it means you have not installed Visual C++.  Note
that there are many flavors of Visual Studio, like Visual Studio for C#
development.  You need to install Visual Studio for C++.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


-- Configuring incomplete, errors occurred!
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "C:UsersACERAppDataLocalTemppip-install-iotpp637dlib_cbdb8998ebb54dee8cad48a70a8a0f3csetup.py", line 223, in <module>
setup(
File "c:usersacerappdatalocalprogramspythonpython39libsite-packagessetuptools__init__.py", line 165, in setup
return distutils.core.setup(**attrs)
File "c:usersacerappdatalocalprogramspythonpython39libdistutilscore.py", line 148, in setup  
dist.run_commands()
File "c:usersacerappdatalocalprogramspythonpython39libdistutilsdist.py", line 966, in run_commands
self.run_command(cmd)
File "c:usersacerappdatalocalprogramspythonpython39libdistutilsdist.py", line 985, in run_command
cmd_obj.run()
File "c:usersacerappdatalocalprogramspythonpython39libsite-packagessetuptoolscommandinstall.py", line 61, in run
return orig.install.run(self)
File "c:usersacerappdatalocalprogramspythonpython39libdistutilscommandinstall.py", line 546, in run
self.run_command('build')
File "c:usersacerappdatalocalprogramspythonpython39libdistutilscmd.py", line 313, in run_command
self.distribution.run_command(command)
File "c:usersacerappdatalocalprogramspythonpython39libdistutilsdist.py", line 985, in run_command
cmd_obj.run()
File "c:usersacerappdatalocalprogramspythonpython39libdistutilscommandbuild.py", line 135, in run
self.run_command(cmd_name)
File "c:usersacerappdatalocalprogramspythonpython39libdistutilscmd.py", line 313, in run_command
self.distribution.run_command(command)
File "c:usersacerappdatalocalprogramspythonpython39libdistutilsdist.py", line 985, in run_command
cmd_obj.run()
File "C:UsersACERAppDataLocalTemppip-install-iotpp637dlib_cbdb8998ebb54dee8cad48a70a8a0f3csetup.py", line 135, in run
self.build_extension(ext)
File "C:UsersACERAppDataLocalTemppip-install-iotpp637dlib_cbdb8998ebb54dee8cad48a70a8a0f3csetup.py", line 172, in build_extension
subprocess.check_call(cmake_setup, cwd=build_folder)
File "c:usersacerappdatalocalprogramspythonpython39libsubprocess.py", line 373, in check_call 
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['cmake', 'C:\Users\ACER\AppData\Local\Temp\pip-install-iotpp637\dlib_cbdb8998ebb54dee8cad48a70a8a0f3c\tools\python', '-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=C:\Users\ACER\AppData\Local\Temp\pip-install-iotpp637\dlib_cbdb8998ebb54dee8cad48a70a8a0f3c\build\lib.win-amd64-3.9', '-DPYTHON_EXECUTABLE=c:\users\acer\appdata\local\programs\python\python39\python.exe', '-DCMAKE_LIBRARY_OUTPUT_DIRECTORY_RELEASE=C:\Users\ACER\AppData\Local\Temp\pip-install-iotpp637\dlib_cbdb8998ebb54dee8cad48a70a8a0f3c\build\lib.win-amd64-3.9', '-A', 'x64']' returned non-zero exit status 1.
----------------------------------------
ERROR: Command errored out with exit status 1: 'c:usersacerappdatalocalprogramspythonpython39python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\Users\ACER\AppData\Local\Temp\pip-install-iotpp637\dlib_cbdb8998ebb54dee8cad48a70a8a0f3c\setup.py'"'"'; __file__='"'"'C:\Users\ACER\AppData\Local\Temp\pip-install-iotpp637\dlib_cbdb8998ebb54dee8cad48a70a8a0f3c\setup.py'"'"';f=getattr(tokenize, 
'"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'rn'"'"', '"'"'n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:UsersACERAppDataLocalTemppip-record-qzdzy48qinstall-record.txt' --single-version-externally-managed --compile --install-headers 'c:usersacerappdatalocalprogramspythonpython39Includedlib' Check the logs for full command output.

附加说明：我安装了cmake并重试，但没有任何更改。

Answer 1

从您得到的错误消息中可以明显看出错误：

您必须使用Visual Studio在windows上构建python扩展。如果你收到此错误意味着您尚未安装Visual C++。笔记Visual Studio有很多风格，比如Visual Studio for C#发展您需要安装Visual Studio for C++。

您需要从这里安装*Visual Studio for C++并重新运行安装，以便可以构建Python的C++扩展。

使用Anaconda可以避免这种情况，因为dlib包已经编译(但目前不适用于Python 3.9(

Answer 2

您可以使用以下方法来避免安装"巨大的"；IDE(VS(或Anaconda

许多二进制文件依赖于Microsoft Visual C++Redistributable for Visual Studio 2015、2017和2019 for Python 3

所以，请尝试使用以下代码来解决

pip install --upgrade setuptools

如果你不能成功地解决这个问题，

然后你可以尝试使用这个链接最新支持的Visual C++下载来安装这个问题