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###配置MMFashion环境

最近需要做一个着装检测的项目，于是想试一下MMFashion的效果，MMFashion的官方链接在这https://github.com/open-mmlab/mmfashion

安装环境：

Pytorch 1.6.4
python 3.6.4
mmcv

按照readme的步骤：

git clone --recursive https://github.com/open-mmlab/mmfashion.git
cd mmfashion
python setup.py install

在第一步git clone时，除了mmfashion的git，还有个远端的文件，等待它下载完成。

在最后一步，setup.py执行时报了网络连接的错误，其实是requirements.txt中需要的依赖文件缺失，对应下载即可：

matplotlib
mmcv>=0.5.1
numpy
scikit-image
scikit-learn

对于mmcv这个包，它是用于计算机视觉研究的基础python库，支持mmlab中的许多研究项目，https://github.com/open-mmlab/mmcv，按照mmcv的read me，有两种安装方式：

（a）直接pip安装

pip install mmcv

（b）离线安装

git clone https://github.com/open-mmlab/mmcv.git
cd mmcv
pip install -e . #安装轻量版本
MMCV_WITH_OPS=1 pip install -e . #安装完整版full version

两种方法都试了，会在安装过程中出现这样的报错：

(Pytorch) wnj@wnj:~/venvs$ pip --default-timeout=1000  install mmcv -i https://pypi.mirrors.ustc.edu.cn/simple/
Looking in indexes: https://pypi.mirrors.ustc.edu.cn/simple/
Collecting mmcv
  Using cached https://mirrors.tuna.tsinghua.edu.cn/pypi/web/packages/7e/0f/71adf51180d7afabe790482f1c8f1129ab6b6fcc7bc7c010691ab67c936f/mmcv-1.1.1.tar.gz (239 kB)
    ERROR: Command errored out with exit status 1:
     command: /home/wnj/venvs/Pytorch/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-ju15ld3t/mmcv/setup.py'"'"'; __file__='"'"'/tmp/pip-install-ju15ld3t/mmcv/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-ju15ld3t/mmcv/pip-egg-info
         cwd: /tmp/pip-install-ju15ld3t/mmcv/
    Complete output (80 lines):
    ERROR: Exception:
    Traceback (most recent call last):
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 425, in _error_catcher
        yield
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 507, in read
        data = self._fp.read(amt) if not fp_closed else b""
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pip/_vendor/cachecontrol/filewrapper.py", line 62, in read
        data = self.__fp.read(amt)
      File "/usr/local/lib/python3.6/http/client.py", line 449, in read
        n = self.readinto(b)
      File "/usr/local/lib/python3.6/http/client.py", line 493, in readinto
        n = self.fp.readinto(b)
      File "/usr/local/lib/python3.6/socket.py", line 586, in readinto
        return self._sock.recv_into(b)
      File "/usr/local/lib/python3.6/ssl.py", line 1009, in recv_into
        return self.read(nbytes, buffer)
      File "/usr/local/lib/python3.6/ssl.py", line 871, in read
        return self._sslobj.read(len, buffer)
      File "/usr/local/lib/python3.6/ssl.py", line 631, in read
        v = 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 "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pip/_internal/cli/base_command.py", line 186, in _main
        status = self.run(options, args)
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pip/_internal/commands/wheel.py", line 161, in run
        resolver.resolve(requirement_set)
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pip/_internal/legacy_resolve.py", line 177, in resolve
        discovered_reqs.extend(self._resolve_one(requirement_set, req))
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pip/_internal/legacy_resolve.py", line 333, in _resolve_one
        abstract_dist = self._get_abstract_dist_for(req_to_install)
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pip/_internal/legacy_resolve.py", line 282, in _get_abstract_dist_for
        abstract_dist = self.preparer.prepare_linked_requirement(req)
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 482, in prepare_linked_requirement
        hashes=hashes,
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 287, in unpack_url
        hashes=hashes,
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 159, in unpack_http_url
        link, downloader, temp_dir.path, hashes
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 303, in _download_http_url
        for chunk in download.chunks:
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pip/_internal/network/utils.py", line 39, in response_chunks
        decode_content=False,
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 564, in stream
        data = self.read(amt=amt, decode_content=decode_content)
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 529, in read
        raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
      File "/usr/local/lib/python3.6/contextlib.py", line 99, in __exit__
        self.gen.throw(type, value, traceback)
      File "/home/wnj/venvs/Pytorch/lib/python3.6/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.
    Traceback (most recent call last):
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/setuptools/installer.py", line 128, in fetch_build_egg
        subprocess.check_call(cmd)
      File "/usr/local/lib/python3.6/subprocess.py", line 291, in check_call
        raise CalledProcessError(retcode, cmd)
    subprocess.CalledProcessError: Command '['/home/wnj/venvs/Pytorch/bin/python', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', '/tmp/tmp9bbyslld', '--quiet', 'Cython']' returned non-zero exit status 2.
    
    During handling of the above exception, another exception occurred:
    
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-ju15ld3t/mmcv/setup.py", line 8, in <module>
        dist.Distribution().fetch_build_eggs(['Cython', 'numpy>=1.11.1'])
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/setuptools/dist.py", line 721, in fetch_build_eggs
        replace_conflicting=True,
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pkg_resources/__init__.py", line 783, in resolve
        replace_conflicting=replace_conflicting
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pkg_resources/__init__.py", line 1066, in best_match
        return self.obtain(req, installer)
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/pkg_resources/__init__.py", line 1078, in obtain
        return installer(requirement)
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/setuptools/dist.py", line 777, in fetch_build_egg
        return fetch_build_egg(self, req)
      File "/home/wnj/venvs/Pytorch/lib/python3.6/site-packages/setuptools/installer.py", line 130, in fetch_build_egg
        raise DistutilsError(str(e))
    distutils.errors.DistutilsError: Command '['/home/wnj/venvs/Pytorch/bin/python', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', '/tmp/tmp9bbyslld', '--quiet', 'Cython']' returned non-zero exit status 2.
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

其实是mmcv的依赖项未建立，主要有：

pytest-runner
pytest
addict
numpy
pyyaml
yapf
opencv-python

配置好后，再执行python setup.py install 就可以顺利执行了。