为什么会说“坏的输入”？

Question

print "This is to find the area or perimeter of a rectangle or triangle?" 
print "Do you want to find the area or perimeter of a rectangle(r) or triangle(t)?" 
l= raw_input("I want to find the area or perimeter of a ") 
if l=='r': 
    print "Do you want to find the area(a) or perimeter(p) of your rectangle?" 
    a= raw_input(" I want to find the ") 
    if a=='p': 
     print "What is the length of the rectangle?" 
     b = int(raw_input("The length of the rectangle is ")) 
     print "What is the width of the rectangle?" 
     c = int(raw_input("THe width of the rectangle is ")) 
     d = (2 * b) + (2 * c) 
     print d 
    elif a=='a': 
     print "Got it. What is the length of your rectangle?" 
     x = int(raw_input("The length of the rectangle is ")) 
     print "What is the width of your rectangle?" 
     y = int(raw_input("The width of the rectangle is ")) 
     z = x * y 
     print z 
if l=='t': 
    print "Do you want to find the area(a) or perimeter(p) of your triangle?" 
    m= raw_input("I want to find the " 
    if m == 'a': 
     print "What is the length of your triangle?" 
     n = int(raw_input("The length of the triangle is " 
     print "What is the width of your triangle? 
     o = int(raw_input("The width of the triagle is " 
     q = (n * o)/2 
     print q 
    elif m=='p' 
     print "What is the first length of your triangle?" 
     r = int(raw_input("The first length of the triangle is ") 
     print "What is the second length of the triangle?" 
     s = int(raw_input("The second length of the triangle is ") 
     print "What is the third length of the triangle?" 
     u = int(raw_input(" The third length of the triangle is ") 
     v = r + s + u 
     print v 

它说在线路上输入错误，说明​​。请帮忙。

Answer 1

改变线

m = raw_input("I want to find the " 

到

m = raw_input("I want to find the ") 

它出现的错误是由未封闭括号引起的。

Answer 2

您有很多丢失括号)。你必须检查他们是否匹配。每个(必须有相应的)。

而且，你有一些:丢失，if或elif条件后：

修正：

print "This is to find the area or perimeter of a rectangle or triangle?" 
print "Do you want to find the area or perimeter of a rectangle(r) or triangle(t)?" 
l = raw_input("I want to find the area or perimeter of a ") 
if l == 'r': 
    print "Do you want to find the area(a) or perimeter(p) of your rectangle?" 
    a = raw_input(" I want to find the ") 
    if a == 'p': 
     print "What is the length of the rectangle?" 
     b = int(raw_input("The length of the rectangle is ")) 
     print "What is the width of the rectangle?" 
     c = int(raw_input("THe width of the rectangle is ")) 
     d = (2 * b) + (2 * c) 
     print d 
    elif a == 'a': 
     print "Got it. What is the length of your rectangle?" 
     x = int(raw_input("The length of the rectangle is ")) 
     print "What is the width of your rectangle?" 
     y = int(raw_input("The width of the rectangle is ")) 
     z = x * y 
     print z 
if l == 't': 
    print "Do you want to find the area(a) or perimeter(p) of your triangle?" 
    m = raw_input("I want to find the ") 
    if m == 'a': 
     print "What is the length of your triangle?" 
     n = int(raw_input("The length of the triangle is ")) 
     print "What is the width of your triangle?" 
     o = int(raw_input("The width of the triagle is ")) 
     q = (n * o)/2 
     print q 
    elif m == 'p': 
     print "What is the first length of your triangle?" 
     r = int(raw_input("The first length of the triangle is ")) 
     print "What is the second length of the triangle?" 
     s = int(raw_input("The second length of the triangle is ")) 
     print "What is the third length of the triangle?" 
     u = int(raw_input(" The third length of the triangle is ")) 
     v = r + s + u 
     print v 

Answer 3

只是为了彻头彻尾矫枉过正的缘故：

from math import pi 
import sys 

# version compatibility shim 
if sys.hexversion < 0x3000000: 
    # Python 2.x 
    inp = raw_input 
else: 
    # Python 3.x 
    inp = input 

# 
# utility functions 
# 

def type_getter(datatype): 
    def get_type(prompt): 
     while True: 
      try: 
       return datatype(inp(prompt)) 
      except ValueError: 
       pass 
    return get_type 

get_float = type_getter(float) 
get_int = type_getter(int) 

def do_menu(prompt, choices): 
    print("") 
    # make the display value 1-based 
    for i,choice in enumerate(choices, 1): 
     print("{:>3}: {}".format(i, choice)) 
    # make the return value 0-based 
    return get_int(prompt + "[1-{}] ".format(len(choices))) - 1 

# 
# base class 
# 

class Shape(object): 
    name = None # subclass will override 
    fields = []  # these values 

    def __init__(self, **kwargs): 
     super(Shape, self).__init__() # <= no longer needed in Python 3 

     for field in self.fields: 
      if field in kwargs: 
       value = kwargs[field] 
      else: 
       value = get_float("What is the {}'s {}? ".format(self.name, field)) 
      setattr(self, field, value) 

    def area(self): 
     raise NotImplemented 

    def perimeter(self): 
     raise NotImplemented 

# 
# Subclasses 
#   

class Triangle(Shape): 
    name = "triangle" 
    fields = ["width", "height"] 

    def area(self): 
     return 0.5 * self.width * self.height 

    def perimeter(self): 
     # We will assume the width and height are 
     # adjacent and opposite sides of a right triangle 
     adj, opp = self.width, self.height 
     hyp = (adj*adj + opp*opp)**0.5 
     return adj + opp + hyp 

class Rectangle(Shape): 
    name = "rectangle" 
    fields = ["width", "height"] 

    def area(self): 
     return self.width * self.height 

    def perimeter(self): 
     return 2 * (self.width + self.height) 

class Ellipse(Shape): 
    name = "ellipse" 
    fields = ["long_axis", "short_axis"] 

    def area(self): 
     return pi * self.long_axis * self.short_axis * 0.25 

    def perimeter(self): 
     # by Ramanujan's approximation - see 
     # http://www.mathsisfun.com/geometry/ellipse-perimeter.html 
     ra = 0.5 * self.long_axis 
     rb = 0.5 * self.short_axis 
     return pi * (3 * (ra + rb) - ((3 * ra + rb) * (ra + 3 * rb))**0.5) 

known_shapes = [Triangle, Rectangle, Ellipse] 
known_actions = ["area", "perimeter"] 

def main(): 
    print("Welcome to the shapifier!") 

    # Which type of shape? 
    shape_choice = do_menu(
     "What shape would you like? ", 
     [shape.name for shape in known_shapes] 
    ) 

    # Make a shape of that type! 
    # (because of the way I wrote Shape.__init__, 
    # it will automatically prompt for required values) 
    shape = known_shapes[shape_choice]() 

    # Which calculation? 
    action_choice = do_menu(
     "What would you like to calculate? ", 
     known_actions 
    ) 

    # Perform the calculation 
    value = getattr(shape, known_actions[action_choice])() 

    # Display the result 
    print("\nThe {} of the {} was {}.".format(known_actions[action_choice], shape.name, value)) 

if __name__=="__main__": 
    main()