在我尝试定义 n 维 Vector 类时,我在定义乘法时遇到了一个"语法"错误,我真的不知道如何解决......
class Vector:
def __init__(self, v):
if len(v)==0: self.v = (0,0)
else: self.v = v
#bunch of functions in between here....
def __mul__(self, other):
if type(other) == Vector:
if len(self.v) != len(other.v):
raise AssertionError
dotprod = 0
for i in range(len(self.v)):
dotprod += self.v[i+1] * other.v[i+1]
return dotprod
elif type(other) in [int, float]:
new = []
for component in self.v:
new.append(component*other)
return Vector(tuple(new))
else:
raise AssertionError
错误如下:
File "<ipython-input-52-50a37fd0919a>", line 40
elif type(other) in [int, float]:
^
SyntaxError: invalid syntax
我已经多次玩弄缩进和 elif 语句,但我真的看不出问题是什么。
提前谢谢。
问题肯定是缩进错误。我认为这就是您的意图:
def __mul__(self, other):
if type(other) == Vector:
if len(self.v) != len(other.v):
raise AssertionError
dotprod = 0
for i in range(len(self.v)):
dotprod += self.v[i+1] * other.v[i+1]
return dotprod
elif type(other) in [int, float]:
new = []
for component in self.v:
new.append(component*other)
return Vector(tuple(new))
else:
raise AssertionError
这使elif
与if
处于相同的缩进级别。