我在python中遇到了一个“无效语法”错误。帮我找个补救办法？

Question

在def(pentagon):块中，我命名了一个变量“first”。但是，这会导致“无效语法”错误。怎么了？我试着给它起其他名字，从单个字母到小写/大写字母的组合，比如“prereaa”。在

def display():
    print('This program will tell you the area some shapes')
    print('You can choose between...')
    print('1. rectangle    2. triangle')
    print('3. circle       4. pentagon')
    print('5. rhombus      6. trapezoid')

def shape():
    shape = int(input('What shape do you choose?'))
    if shape == 1: rectangle()
    elif shape == 2: triangle()
    elif shape == 3: circle()
    elif shape == 4: pentagon()
    elif shape == 5: rhombus()
    elif shape == 6: trapezoid()
    else:
        print('ERROR: select 1 2 3 4 5 or 6')
        shape()


def rectangle():
    l = int(input('What is the length?'))
    w = int(input('What is the width?'))
    areaR=l*w
    print('The area is...')
    print(areaR)


def triangle():
    b = int(input('What is the base?'))
    h = int(input('What is the height?'))
    first=b*h
    areaT=.5*first
    print('The area is...')
    print(areaT)


def circle():
    r = int(input('What is the radius?'))
    preCircle = r**2
    areaC = 3.14*preCircle
    print('The area is...')
    print(areaC)


def pentagon():
    s = int(input('What is the side length')
    first = s**2
    areaP = 1.72*first
    print('The area is...')
    print(areaP)


def rhombus():
    b = int(input('What is the base?')
    h = int(input('What is the height?')
    areaR = b*h
    print('The area is...')
    print(areaR)


def trapezoid():
    baseOne = int(input('What is the first base?')
    baseTwo = int(input('What is the second base?')
    h = int(input('What is the height')
    first = baseOne*baseTwo
    second = first/2
    areaT = second*h
    print('The area is...')
    print(areaT)


if __name__=="__main__":
    display() 
    shape() 

Answer 1

缺少右括号：s = int(input('What is the side length'))

Answer 2

这条线：

s = int(input('What is the side length')

缺少一个结束paren。编程需要注意许多细节。。。在

Answer 3

 s = int(input('What is the side length')

您缺少结束符)

实际上，我注意到您在rhombus、pentagon和{}中的其他input语句也有类似的问题，您可能复制了代码：）

您可能需要使用一个编辑器来帮助您匹配左括号和右括号。这将有助于避免此类错误。在