Python AttributeError: module object has no attribute

Question

为什么我写了这个属性却报错

写了一个模块文件hellohello.py

import numpy as np
def xgate(qinput):
        xmat = np.matrix([[0, 1],
                    [1, 0]])
        return np.matmul(xgate,qinput)
    
    

在Jupyter Notebook上

import numpy as np
state1 = np.array([0.2,0.8])
state1 = state1[:,None]
import hellohello
hellohello.xgate(state1)

报错

Answer 1

是jupyter notebook默认路径的问题，改完环境变量就解决了

Answer 2

更改hellohello.py文件:

import numpy as np
def xgate(qinput):
    xmat = np.matrix([[0, 1],[1, 0]])
    return np.matmul(xmat,qinput)