FileNotFoundError: setup.py的pip安装失败

Question

在运行pip安装时，我会收到如下错误：

$ pip install pycairo
Downloading/unpacking pycairo
  You are installing a potentially insecure and unverifiable file. Future versions of pip will default to disallowing insecure files.
  Downloading pycairo-1.10.0.tar.bz2 (246kB): 246kB downloaded
  Running setup.py egg_info for package pycairo
    Traceback (most recent call last):
      File "<string>", line 16, in <module>
    FileNotFoundError: [Errno 2] No such file or directory: '/home/naught101/.virtualenvs/virtualenv-3/build/pycairo/setup.py'
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

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

FileNotFoundError: [Errno 2] No such file or directory: '/home/naught101/.virtualenvs/virtualenv-3/build/pycairo/setup.py'

----------------------------------------
Cleaning up...
Command python setup.py egg_info failed with error code 1 in /home/naught101/.virtualenvs/virtualenv-3/build/pycairo
Storing complete log in /home/naught101/.pip/pip.log

这是发生在皮凯罗，小口。

$ pip --version
pip 1.4.1 from /home/naught101/.virtualenvs/virtualenv-3/lib/python3.3/site-packages (python 3.3)

Answer 1

pycairo不是由setuptools构建的，因此不能由pip安装。

正如安装文档所述：

Install Procedure
-----------------
$ ./waf --help     # shows available waf options
$ ./waf configure  # use --prefix and --libdir if necessary
                   # --prefix=/usr --libdir=/usr/lib64  for Fedora 64-bit
$ ./waf build
$ ./waf install

Use
$ python3 ./waf ...
if you have python2 and python3 installed, and the default is python 2.

您仍然可以使用pip来获取它：

$ pip install --download=. pycairo
Downloading/unpacking pycairo
  Downloading pycairo-1.10.0.tar.bz2 (246kB): 246kB downloaded
$ tar xf pycairo-1.10.0.tar.bz2
$ cd pycairo-1.10.0
$ python ./waf etc.

只需确保您从虚拟环境中使用Python，并将正确的选项传递给configure命令(--prefix=$VIRTUAL_ENV应该足够了，但不要引用我的话；您可能还必须将PYTHON环境变量设置为您的虚拟化Python的路径或其他东西)。

另一种选择是使用开罗绑定的另一组，如cairocffi。但这显然是一个很大的变化，这可能是不合适的。