python 执行报错AttributeError: 'list' object has no attribute 'g'

                          ^
SyntaxError: invalid syntax

E:\数学-机器学习-西瓜书-周志华\UDACITY购课\project1 矩阵操作>python test.py
Traceback (most recent call last):
  File "test.py", line 86, in <module>
    test()
  File "test.py", line 54, in test
    assert equal(-I2, I2_neg), "Error in your __neg__ function"
  File "test.py", line 78, in equal
    if len(m1.g) != len(m2.g): return False
AttributeError: 'list' object has no attribute 'g'

 

 

def equal(m1, m2):
    if len(m1.g) != len(m2.g): return False
    if len(m1.g[0]) != len(m2.g[0]): return False
    for r1, r2 in zip(m1.g, m2.g):
        for v1, v2 in zip(r1, r2):
            if abs(v1 - v2) > 0.0001:
                return False
    return True