打电话给IPython 5.x魔术＆＃39; whos＆＃39;来自Python2脚本

Question

我想展示我的ndarray变量＆＃34; workspace＆＃34;当有异常时，我做了以下代码：

import sys
import numpy as np
try :
    a1 = np.random.random_integers(5, size=(3,2))
    functionThatProvokesAnException(*arguments)
except Exception as why :
    print("=> ERROR: %s" % why,file=sys.stderr)
    from IPython import get_ipython
    ipython = get_ipython()
    ipython.magic("whos ndarray")
    sys.exit(-2)

但它说： AttributeError: 'NoneType' object has no attribute 'magic'

你能帮忙吗？