Numpy Cimport error using cython
Question: I am trying to Cimport Numpy into a Python 2.7 shell from a `.pyx` file, but
it keeps giving me the same error:

I made a `.pyx` file called `numpyx` just to see if it was part of the bigger
code I was running, the file contains:

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

I get the following error every time:

    
    
    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"]
    

I don't understand why it won't work, since it compiles `.pyx` files fine as
long as `cimport` isn't in them.

If anyone could shed some light on this it would be great!


Answer: Well the function your looking for is available in the python package. (I find
no reference to linspace in numpy.pxd)

I usually do something along these lines:

    
    
    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
    

