赋值要求将罗马整数转换为整数。但是没有与罗马整数相关的语法(即IV!=4 IV=6)我正在努力提高代码的效率。。。你知道吗
这是我的原始代码:
def roman_v2():
s = input("Enter a roman number using capital letters M, D, C, X, V and I: ")
count = 0
r_nums = ["M","D","C","X","V","I"]
for letter in s:
if letter in r_nums[0]:
count += 1000
elif letter in r_nums[1]:
count += 500
elif letter in r_nums[2]:
count += 100
elif letter in r_nums[3]:
count += 10
elif letter in r_nums[4]:
count += 5
elif letter in r_nums[5]:
count += 1
return count
下面是我的程序错误:
def roman_v2():
s = input("Enter a roman number using capital letters M, D, C, X, V and I: ")
count = 0
r_nums = [["M",1000],["D",500],["C",100],["X",10],["V",5],["I",1]]
for i in s:
for j in range(0,5):
if s[i] == r_nums[j][0]:
count += r_nums[i][1]
return count
这个
应该是
因为我将是角色,而不是索引。你知道吗
在
count += r_nums[i][1]
中,i是错误的,应该是j给你
您可以使用字典和
sum()
函数来压缩代码:这将查找每个字母的值,将它们全部相加,然后返回总数。错误检查(对于错误输入,如
'MMpotato'
)由您决定。你知道吗可以在python中使用
dict
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