ipython - Ipython 中的 Cython : ERROR: Cell magic `%%cython` not found

Question

在 ipython 笔记本中使用 cython 时，我看到以下错误。怎么了？

%load_ext cythonmagic
/usr/local/lib/python2.7/dist-packages/IPython/extensions/cythonmagic.py:21: UserWarning: The Cython magic has been moved to the Cython package
      warnings.warn("""The Cython magic has been moved to the Cython package""")



%%cython
def fib(int n):
    cdef int a,b,i
    for i in range(n):
        a,b=a+b,b
    return a 

ERROR: Cell magic `%%cython` not found.

Answer 1

警告试图传达的是定义 %%cython 魔法的扩展已移至 IPython 包之外的 Cython 包。所以而不是

%load_ext cythonmagic

你应该这样做:

%load_ext Cython

之后，cython 魔法应该按预期工作。