无法在 Python 3 上安装 wsgiref

Question

我在安装时遇到问题 wsgiref:

$ python --version
Python 3.6.0 :: Anaconda 4.3.1 (x86_64)
$ pip --version
pip 9.0.1 from /anaconda/lib/python3.6/site-packages (python 3.6)

我的requirement.txt文件如下所示。

numpy==1.8.1
scipy==0.14.0
pyzmq==14.3.1
pandas==0.14.0
Jinja2==2.7.3
MarkupSafe==0.23
backports.ssl-match-hostname==3.4.0.2
gnureadline==6.3.3
ipython==2.1.0
matplotlib==1.3.1
nose==1.3.3
openpyxl==1.8.6
patsy==0.2.1
pyparsing==2.0.2
python-dateutil==2.2
pytz==2014.4
scikit-learn==0.14.1
six==1.7.3
tornado==3.2.2
wsgiref==0.1.2
statsmodels==0.5.0

当我运行 pip install -r requirement.txt 时，我得到了这个错误

Collecting wsgiref==0.1.2 (from -r requirements.txt (line 20))
  Using cached wsgiref-0.1.2.zip
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/private/var/folders/xs/y0pbzxkn7gqcdtrz4cpxtwrw0000gn/T/pip-build-hkiqbu1j/wsgiref/setup.py", line 5, in <module>
        import ez_setup
      File "/private/var/folders/xs/y0pbzxkn7gqcdtrz4cpxtwrw0000gn/T/pip-build-hkiqbu1j/wsgiref/ez_setup/__init__.py", line 170
        print "Setuptools version",version,"or greater has been installed."
                                 ^
    SyntaxError: Missing parentheses in call to 'print'
    
    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/xs/y0pbzxkn7gqcdtrz4cpxtwrw0000gn/T/pip-build-hkiqbu1j/wsgiref/

我试过运行 pip install --upgrade setuptools 和 sudo easy_install -U setuptools 但都不起作用。我该如何解决这个问题？

Answer 1

根据这一行SyntaxError: Missing parentheses in call to 'print'，我认为它需要Python 2.x到运行 setup.py。 print 是否使用括号是Python 2 和Python 3.

的不同语法

这是Github issue的解决方案：

There are a few fixes that will get you running, in order of least work to most:

Switch over to python2.7 for your will installs.

Try to upgrade wsgiref with pip install --upgrade wsgiref, and see if the latest version works with your setup, and with will (if it doesn't, you'd notice the http/webhooks stuff not working.

If you try 2) and it works, submit a PR here with the upgraded version in requirements.txt. (You can find out what versions you've got by using pip freeze).

您可以找到有关语法差异的更多信息here

Answer 2

wsgiref 已经作为标准库包含在 Python 3... 因此，如果您正在尝试使用 Python 3，请继续并导入 wsgiref 就可以了。

无法在 Python 3 上安装 wsgiref

Failed to install wsgiref on Python 3

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python-3.x

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wsgiref