TypeError：无法在第 10 行连接“str”和“float”对象 [重复]

Question

print("\n\nThis is a basic program to find the letter grade for a student.")
student = input("What is the students name? : ")
test1 = input("What is the first test grade " + student.capitalize() + " recieved? : ")
test2 = input("What is the second test grade " + student.capitalize() + " recieved? : ")
test3 = input("What is the third test grade " + student.capitalize() + " recieved? : ")
averageTest = (int(test1) + int(test2) + int(test3))
print(student.capitalize() + " recieved an average test grade of " + ((averageTest) / 3))

我正在编写一个初级计算器程序，但无法解决这个问题

TypeError: 无法连接 'str' 和 'float' 对象

我还有很多要写的，我坚持这一行 print(student.capitalize() + " recieved an average test grade of " + ((averageTest) / 3))

Answer 1

您不能添加字符串和数字（​​浮点数）。相反，将浮点数转换为字符串，然后再添加另一个字符串。你可以这样做

str(x)

在你的情况下，这将是：

# converting the float to a string
print(student.capitalize() + " recieved an average test grade of " + str((averageTest) / 3))

# or, to avoid using addition or conversion at all in a console print
print student.capitalise(), "recieved an average test grade of", averageTest/3

# or even using string formatting (example is py2.7)
print '%s recieved an average test grade of %s' % (student.capitalise(), averageTest/3)