Python pip安装[所有]不安装依赖项

我正在尝试使用pip install statsmodels[all]安装statsmodels及其所有依赖项

问题：为什么它仍然告诉我缺少依赖项

输出：

---

因为我们选择不强制打包工具为您安装依赖项。

因为我讨厌pip卸载我的numpy，因为当我想安装或更新需要numpy的包时，我会尝试更新它。pip实际上没有在Windows上安装numpy，因为它不使用二进制文件。

Downloading/unpacking statsmodels[all]
  Using download cache from /Users/mynusername/.pip/cache/https%3A%2F%2Fpypi.python.org%2Fpackages%2Fsource%2Fs%2Fstatsmodels%2Fstatsmodels-0.5.0.tar.gz
  Running setup.py egg_info for package statsmodels
    Traceback (most recent call last):
      File "<string>", line 16, in <module>
      File "/Users/mynusername/.virtualenvs/datasci/build/statsmodels/setup.py", line 463, in <module>
        check_dependency_versions(min_versions)
      File "/Users/mynusername/.virtualenvs/datasci/build/statsmodels/setup.py", line 122, in check_dependency_versions
        raise ImportError("statsmodels requires patsy. http://patsy.readthedocs.org")
    ImportError: statsmodels requires patsy. http://patsy.readthedocs.org
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

  File "<string>", line 16, in <module>

  File "/Users/mynusername/.virtualenvs/datasci/build/statsmodels/setup.py", line 463, in <module>

    check_dependency_versions(min_versions)

  File "/Users/mynusername/.virtualenvs/datasci/build/statsmodels/setup.py", line 122, in check_dependency_versions

    raise ImportError("statsmodels requires patsy. http://patsy.readthedocs.org")

ImportError: statsmodels requires patsy. http://patsy.readthedocs.org