typeerror 不支持 / 'str' 和 'int' 的操作數類型

Question

如果三個數字，我試圖從列表中找到平均分數，如下所示：

a = (lines.split(":")[1].split(",")[-3:])
Print (a)
Averagescore = sum(a)/len(a)
Print (averagescore)

然后它說： typeerror unsupported operand type(s) for / 'str' and 'int'

Answer 1

我懷疑您描述的錯誤消息對於此代碼可能不准確，但問題是您試圖將字符串列表視為整數列表。 例如

>>> s = "1 16 32" # string
>>> s.split() # this returns a list of strings
['1', '16', '32']
>>> s.split()[0] + 1 # you can't add an int to a string
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: Can't convert 'int' object to str implicitly

如果要將它們視為整數（或浮點數），則需要將轉換添加為

a = [int(n) for n in s.split()]
a = [float(n) for n in s.split()] # alternatively