当pip安装ssh-import-id时，没有名为'requests'的模块

Question

我正在使用Heroku作为开发服务器。当我尝试将我的Django应用程序推送到Heroku时，它首先尝试从requirements.txt文件安装我的包。

requests==2.18.3
ssh-import-id==5.5

问题是我与其他人的一个包依赖。在上面的包中，ssh-import-id需要已经安装的requests包。因此，当我推送应用程序时，pip无法安装并停止部署。

Collecting requests==2.18.3 (from -r re.txt (line 1))
Using cached https://files.pythonhosted.org/packages/ba/92/c35ed010e8f96781f08dfa6d9a6a19445a175a9304aceedece77cd48b68f/requests-2.18.3-py2.py3-none-any.whl
Collecting ssh-import-id==5.5 (from -r re.txt (line 2))
Using cached https://files.pythonhosted.org/packages/66/cc/0a8662a2d2a781db546944f3820b9a3a1a664a47c000577b7fb4db2dfbf8/ssh-import-id-5.5.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/tmp/pip-install-go0a5mxf/ssh-import-id/setup.py", line 20, in <module>
    from ssh_import_id import __version__
  File "/tmp/pip-install-go0a5mxf/ssh-import-id/ssh_import_id/__init__.py", line 25, in <module>
    import requests
ModuleNotFoundError: No module named 'requests'

----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-go0a5mxf/ssh-import-id/

我需要一次性使用pip安装所有列出的软件包。因为默认情况下Heroku运行，pip install -r requirements.txt。

Answer 1

这is a bug。

库的setup.py导入库以获取包含在setup()函数调用中的版本...

import os
from setuptools import setup
from ssh_import_id import __version__

...并且库尝试导入环境中尚不存在的请求。这是ssh_import_id.__init__.py：

import argparse
import json
import logging
import os
import platform
import requests  # <=== here
import stat
import subprocess
import sys
import tempfile

添加了一个修复程序，可以解决需要导入包以获取版本的问题...

import os
from setuptools import setup
import sys


def read_version():
    # shove 'version' into the path so we can import it without going through
    # ssh_import_id which has deps that wont be available at setup.py time.
    # specifically, from 'ssh_import_id import version'
    # will fail due to requests not available.
    verdir = os.path.abspath(
        os.path.join(os.path.dirname(__file__), "ssh_import_id"))
    sys.path.insert(0, verdir)
    import version
    return version.VERSION

...但修复程序不在当前的pypi版本5.6中。

您可以通过将requirements.txt更改为以下内容，从源代码而不是pypi安装最新的master分支：

-e git+https://git.launchpad.net/ssh-import-id#egg=master