Pmw.py 文件源码

def realvalidator(text, separator = '.'):
    if separator != '.':
        if string.find(text, '.') >= 0:
            return ERROR
        index = string.find(text, separator)
        if index >= 0:
            text = text[:index] + '.' + text[index + 1:]
    try:
        string.atof(text)
        return OK
    except ValueError:
        # Check if the string could be made valid by appending a digit
        # eg ('-', '+', '.', '-.', '+.', '1.23e', '1E-').
        if len(text) == 0:
            return PARTIAL
        if text[-1] in string.digits:
            return ERROR
        try:
            string.atof(text + '0')
            return PARTIAL
        except ValueError:
            return ERROR