Python 3.3：无效的语法错误

Question

我很困惑，为什么我在这个程序中得到一个无效的语法错误。我想这很简单，但我对此很陌生。这是整个事情：

# Welcome Message 
print ("Hello and welcome to the Plesha EasyTube Wizard!") 
print ("Today we will be gathering measurements from you to determine the \ 
materials and cost of your tubes.") 
print ("All measurements should be in centimeters!") 
print() 

# Collect user inputs 
height = float(input("Let's begin: What is the height of you desired tube? ")) 
radius = float(input("And what is the radius? ")) 
count = int(input("How many would you like? ")) 

# Set Constants 
steelPrice = 0.14 
rubberPrice = 0.02 

# Calculations 
import math 
singleTubeVol = math.pi * (radius ** 2) * height 
allTubeVol = singleTubeVol * count 
singleTubeSurface = (2 * math.pi * (radius ** 2)) + (2 * math.pi * radius * height) 
allTubeSurface = singleTubeSurface * count 
singleTubeRubber = 2 * math.pi * (radius + 0.5) * height 
allTubeRubber = singleTubeRubber * count 
steelCost = steelPrice * allTubeSurface 
rubberCost = rubberPrice * allTubeRubber 
totalCost = rubberCost + steelCost 

# Output 
                 V------ here is where the problem is 
print ("You wanted ", count " tubes in the dimesions ", height \ 
    " centimeters by ", radius " centimeters (radius).") 
print ("The volume of a single tube of your specifications is: ", singleTubeVol) 
print ("The total volume of your tube order will be ", allTubeVol) 
print ("You will require ", allTubeSurface " square centimeters of steel. Totalling "\ 
    , steelCost "in price.") 
print ("You will require ", allTubeRubber " square centimeters of rubber. Totalling "\ 
    , rubberCost " in price.") 
print ("Your total cost for this order will be ", totalCost) 

我欣赏任何帮助newb。

Answer 1

你忘了几个逗号：

print ("You wanted ", count, " tubes in the dimesions ", height, 
#      -----^        -----^ 

放在后面的行

，更再次：

" centimeters by ", radius, " centimeters (radius).") 
#      -----^ 
print ("The volume of a single tube of your specifications is: ", singleTubeVol) 
print ("The total volume of your tube order will be ", allTubeVol) 
print ("You will require ", allTubeSurface, " square centimeters of steel. Totalling " 
#         -----^ 
    , steelCost, "in price.") 
#  -----^ 
print ("You will require ", allTubeRubber, " square centimeters of rubber. Totalling " 
#         -----^ 
    , rubberCost, " in price.") 
#   -----^ 

我会更好，如果你使用的格式：

print("""\ 
You wanted {count} tubes in the dimesions {height:0.2f} centimeters by {radius:0.2f} centimeters (radius). 
The volume of a single tube of your specifications is: {singleTubeVol:0.2f} 
The total volume of your tube order will be {allTubeVol:0.2f} 
You will require {allTubeSurface:0.2f} square centimeters of steel. Totalling {steelCost:0.2f} in price. 
You will require {allTubeRubber:0.2f} square centimeters of rubber. Totalling {rubberCost:0.2f} in price. 
Your total cost for this order will be {totalCost:0.2f}""".format(**locals())) 

这使用str.format() method，与"""结合使用三重字符串来格式化文本一次性使用小数点后两位小数格式化浮点值。

输出示例：

Hello and welcome to the Plesha EasyTube Wizard! 
Today we will be gathering measurements from you to determine the materials and cost of your tubes. 
All measurements should be in centimeters! 

Let's begin: What is the height of you desired tube? 10 
And what is the radius? 2.5 
How many would you like? 3 
You wanted 3 tubes in the dimesions 10.00 centimeters by 2.50 centimeters (radius). 
The volume of a single tube of your specifications is: 196.35 
The total volume of your tube order will be 589.05 
You will require 589.05 square centimeters of steel. Totalling 82.47 in price. 
You will require 565.49 square centimeters of rubber. Totalling 11.31 in price. 
Your total cost for this order will be 93.78 

Answer 2

的您正在使用可能会非常棘手，所以你最好尝试打印格式参数报价，这样的改进前人的精力一点点：

# Output ------ here is where the problem is 
print ("You wanted %d tubes in the dimesions %d centimeters by %d centimeters (%d)." %(count, height, radius, radius)) 
print ("The volume of a single tube of your specifications is: ", singleTubeVol) 
print ("The total volume of your tube order will be ", allTubeVol) 
print ("You will require %d square centimeters of steel. Totalling %d in price." %(allTubeSurface, steelCost)) 
print ("You will require %d square centimeters of rubber. Totalling %d in price." %(allTubeRubber, rubberCost)) 
print ("Your total cost for this order will be ", totalCost) 

我仍然相信有更好的解决方案。