title: Wrapping C++ Standard library with Cython in ipython
body: <p>According to the Cython documentation ,I write the following cython code as follows:  </p>
  
  <pre><code>In [1]:%load_ext Cython
  In [2]: %%cython
           from libcpp.vector cimport vector
  ​         cdef vector[int] *vec_int = new vector[int](10)
  </code></pre>
  
  <p>After compiling,the ipython generated the following error:  </p>
  
  <pre><code>Error compiling Cython file:
  ------------------------------------------------------------ 
  ... 
  from libcpp.vector cimport vector 
  cdef vector[int] *vec_int = new vector[int](10) 
                                 ^ 
  ------------------------------------------------------------
  /Users/m/.ipython/cython/_cython_magic_a72abb419ccf1b31db9a1851b522a4bf.pyx:3:32: Operation only allowed in c++
  </code></pre>
  
  <p>what's wrong with my code?</p>