Question

我有一个包含货币值的字符串我必须逐字逐句地读取字符串，函数必须为result = 0的所有值返回val。

例如：string = "You Score is MX var."
var可以包含任何这些值的地方

[14 , 14.98 , 114 , 114.98 , 1116 , 1,116 , 1116.78 , 1,116.18 , 11,12,123 , 1,12,123.89 ... and so on...]

我的代码

def evaluate():
    result , count = 0 , 0
    dot , comma = False , False
    while (index_of_String < Len_of_string):
        ch = string[index_of_String]        
        if (ch == '.'):
            if (dot == True):
                break ;                
            dot = True            
        elif (ch == ','):
            if (dot == True):
                break            
            comma = True             
        elif not (ch >= '0' and ch <= '9'):
            if not (ch == ' ' or ch == ','):                
                result = -1            
            break
        else:
            if (dot == False):
                count += 1
        print ("Char %c" % ch)
        index_of_String += 1        

    print ("count of numeric digits %d" % count)
    if (result == 0):
        if dot == False:
            result = -1
        if comma == False:
            if (count > 3):
                result = -1

    return (result, index_of_String)

所需输出

string = "You Score is MX 14."
result = 0

string = "You Score is MX 14.89."
result = 0

string = "You Score is MX 1114.89."
result = 0

string = "You Score is MX 1,114.89."
result = 0  

string = "You Score is MX 11,,,14.89."
result = -1 (fail)

string = "You Score is MX 11.14.89."
result = -1 (fail)

string = "You Score is MX 1,114.89."
result = 0  

string = "You Score is MX 1,14.89."
result = -1 (fail)

string = "You Score is MX 1,11,114.89."
result = 0

我需要做哪些修改才能使我的代码适用于所有这些情况任何帮助修改??

Answer 1

如果char不是char，那么：

def evaluate(string, values):
    for word in string.rstrip('.').split():
        if word in values:
            return False
    return True

测试：

>>> values = map(str, [14 , 14.98 , 114 , 114.98 , 1116])
['14', '14.98', '114', '114.98', '1116']
>>> string = 'You Score is MX 14.98.'
>>> evaluate(string, values)
False
string = 'You Score is MX 115.' # 115 is not in values
>>> evaluate(string, values)
True

Answer 2

如果你真的需要通过char去char：

def evaluate(string, values):
    value = []
    for char in string:
        if char.isdigit() or char in ',.':
            value.append(char)
    value = ''.join(value).strip('.,')
    return int(value in values)

测试

>>> values = ['14', '14.98', '114', '114.98', '1,116.5']
>>> string = 'You Score is MX 14.98.'
>>> evaluate(string, values)
1
string = 'You Score is MX 115.' # 115 is not in values
>>> evaluate(string, values)
0

验证以char为单位读取char的逗号分隔的十进制值

2 个答案: