+- Python Forum (https://python-forum.io)
+-- Forum: Python Coding (https://python-forum.io/forum-7.html)
+--- Forum: General Coding Help (https://python-forum.io/forum-8.html)
+--- Thread: TypeError: can't multiply sequence by non-int of type 'float' (/thread-25572.html)
TypeError: can't multiply sequence by non-int of type 'float' - DimosG - Apr-03-2020
Hi guys I'm having a problem with an assignment in my class we are now on using fullmatrix and sparce and I get this error in my code :
class Vector(object):
def __init__(self, data):
self.data = data
self.rows = len(data)
def __mul__(self, other):
assert self.rows == other.rows
return sum([vi * vj for vi, vj in zip(self.data, other.data)])
def __rmul__(self, a):
data = [a * d for d in self.data]
return Vector(data)
def __add__(self, other):
assert self.rows == other.rows
return Vector([i + j for (i, j) in zip(self.data, other.data)])
def __sub__(self, other):
assert self.rows == other.rows
return Vector([i - j for (i, j) in zip(self.data, other.data)])
def norm(self):
return math.sqrt(self * self)
def __str__(self):
return '{0}'.format(self.data)Error: File "C:\Users\illar\Desktop\05.py", line 116, in <listcomp>
data = [a * d for d in self.data]
TypeError: can't multiply sequence by non-int of type 'float'RE: TypeError: can't multiply sequence by non-int of type 'float' - micseydel - Apr-03-2020
You should provide enough code to reproduce the issue. As-is, things are missing. You'll be more likely to get a fast response if you remove unnecessary details though.
RE: TypeError: can't multiply sequence by non-int of type 'float' - bowlofred - Apr-03-2020
Your __rmul__ method seems to try to multiply two things together without checking if that's appropriate. If one of the factors is a sequence and the other is float, you'll get this error.
>>> ['a', 'b', 'c'] * 3.0 Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: can't multiply sequence by non-int of type 'float'Either fix your inputs or have your method massage a float into an int if that's more appropriate.
RE: TypeError: can't multiply sequence by non-int of type 'float' - michael1789 - Apr-04-2020
Change the "3.0" to just "3". Floats are decimal numbers.