使用 Cython 时，“cimport numpy”会引发错误

Question

我试图从 .pyx 文件将 cimport NumPy 导入 Python 2.7 shell，但它一直给我同样的错误：

我做了一个 .pyx 文件名为 numpyx 只是为了看看它是否是我正在运行的更大代码的一部分，该文件包含：

cimport numpy as np
a = np.arange(0,10)
print 'a= ',a

我每次都会收到以下错误：

Traceback (most recent call last):
  File "<pyshell#82>", line 1, in <module>
    import numpyx
  File "C:\Users\Scott\AppData\Roaming\Python\Python27\site-packages\pyximport       \pyximport.py", line 335, in load_module
    self.pyxbuild_dir)
  File "C:\Users\Scott\AppData\Roaming\Python\Python27\site-packages\pyximport\pyximport.py", line 183, in load_module
    so_path = build_module(name, pyxfilename, pyxbuild_dir)
  File "C:\Users\Scott\AppData\Roaming\Python\Python27\site-packages\pyximport\pyximport.py", line 167, in build_module
    reload_support=pyxargs.reload_support)
  File "C:\Users\Scott\AppData\Roaming\Python\Python27\site-packages\pyximport\pyxbuild.py", line 85, in pyx_to_dll
    dist.run_commands()
  File "C:\Python27\lib\distutils\dist.py", line 953, in run_commands
    self.run_command(cmd)
  File "C:\Python27\lib\distutils\dist.py", line 972, in run_command
    cmd_obj.run()
  File "C:\Users\Scott\AppData\Roaming\Python\Python27\site-packages\Cython\Distutils\build_ext.py", line 135, in run
_    build_ext.build_ext.run(self)
  File "C:\Python27\lib\distutils\command\build_ext.py", line 340, in run
    self.build_extensions()
  File "C:\Users\Scott\AppData\Roaming\Python\Python27\site-packages\Cython\Distutils\build_ext.py", line 143, in build_extensions
    self.build_extension(ext)
  File "C:\Python27\lib\distutils\command\build_ext.py", line 499, in build_extension
    depends=ext.depends)
  File "C:\Python27\lib\distutils\ccompiler.py", line 624, in compile
    self._compile(obj, src, ext, cc_args, extra_postargs, pp_opts)
  File "C:\Python27\lib\distutils\cygwinccompiler.py", line 166, in _compile
    raise CompileError, msg
ImportError: Building module failed: ["CompileError: command 'gcc' failed with exit status 1\n"]

我不明白为什么它不起作用，因为它编译了只要 cimport 不在其中，.pyx 文件就可以正常工作。

如果有人能阐明这一点，那就太好了！

Answer 1

那么你要找的函数可以在 python 包中找到。
（我在 numpy.pxd 中没有找到对 linspace 的引用）

我通常会按照以下方式做一些事情：

import numpy as np
cimport numpy as cnp

def foo(double x):
    cdef cnp.ndarray[cnp.float64_t, ndim=1] y = np.linspace(0, 10, 11)
    # do whatever
    return y