python - TypeError 参数太多

Question

运行此代码时出现错误，第 8 行中的参数太多。我不确定如何修复它。

#Defining a function to raise the first to the power of the second.
def power_value(x,y):
    return x**y

##Testing 'power_value' function
#Getting the users inputs
x = int(input("What is the first number?\n"))
y = int(input("What power would you like to raise",x,"to?\n"))

#Printing the result
print (x,"to the power of",y,"is:",power_value(x,y))

导致类型错误...

     Traceback (most recent call last):
  File "C:\[bla location]", line 8, in <module>
    y = int(input("What power would you like to raise",x,"to?\n"))
TypeError: input expected at most 1 arguments, got 3

Answer 1

问题是 python input() 函数只准备好接受一个参数——提示字符串，但你传入了三个。要解决这个问题，您只需将所有三个部分合二为一。

您可以使用% 运算符来格式化字符串:

y = int(input("What power would you like to raise %d to?\n" %x,))

或者使用新的方式:

y = int(input("What power would you like to raise {0} to?\n".format(x)))

您可以找到文档 here .