我正在编写一个简单的程序来帮助为我所属的游戏生成订单。它属于我实际上并不需要的程序。但现在我已经开始了,我希望它能够发挥作用。这一切都运行得很顺利,但我无法弄清楚如何在中途停止类型错误。这是代码;
status = 1
print "[b][u]magic[/u][/b]"
while status == 1:
print " "
print "would you like to:"
print " "
print "1) add another spell"
print "2) end"
print " "
choice = input("Choose your option: ")
print " "
if choice == 1:
name = raw_input("What is the spell called?")
level = raw_input("What level of the spell are you trying to research?")
print "What tier is the spell: "
print " "
print "1) low"
print "2) mid"
print "3) high"
print " "
tier = input("Choose your option: ")
if tier == 1:
materials = 1 + (level * 1)
rp = 10 + (level * 5)
elif tier == 2:
materials = 2 + (level * 1.5)
rp = 10 + (level * 15)
elif tier == 3:
materials = 5 + (level * 2)
rp = 60 + (level * 40)
print "research ", name, "to level ", level, "--- material cost = ",
materials, "and research point cost =", rp
elif choice == 2:
status = 0
有人可以帮忙吗?
修改的
我得到的错误是;
Traceback (most recent call last):
File "C:\Users\Mike\Documents\python\magic orders", line 27, in <module>
materials = 1 + (level * 1)
TypeError: unsupported operand type(s) for +: 'int' and 'str'
答案 0 :(得分:13)
堆栈跟踪会有所帮助,但可能错误是:
materials = 1 + (level * 1)
'level'是一个字符串,你不能对字符串进行算术运算。 Python是一种动态类型语言,但不是弱类型语言。
level= raw_input('blah')
try:
level= int(level)
except ValueError:
# user put something non-numeric in, tell them off
在程序的其他部分,您使用input(),它将输入的字符串评估为Python,因此对于“1”,将为您提供数字1。
但是!这是非常危险的 - 想象一下如果用户键入“os.remove(filename)”而不是数字会发生什么。除非用户只是你并且你不在乎,否则永远不要使用input()。它将在Python 3.0中消失(raw_input的行为将被重命名为输入)。