python 判断中英文、数字及全角半角等

def is_chinese(uchar):
"""判断一个unicode是否是汉字"""
    if uchar >= u'\u4e00' and uchar<=u'\u9fa5':
        return True
    else:
        return False

def is_number(uchar):
"""判断一个unicode是否是数字"""
    if uchar >= u'\u0030' and uchar<=u'\u0039':
        return True
    else:
        return False

def is_alphabet(uchar):
"""判断一个unicode是否是英文字母"""
    if (uchar >= u'\u0041' and uchar<=u'\u005a') or (uchar >= u'\u0061' and uchar<=u'\u007a'):
        return True
    else:
        return False

def is_other(uchar):
"""判断是否非汉字，数字和英文字符"""
    if not (is_chinese(uchar) or is_number(uchar) or is_alphabet(uchar)):
        return True
    else:
        return False

def B2Q(uchar):
"""半角转全角"""
    inside_code=ord(uchar)
    if inside_code<0x0020 or inside_code>0x7e: #不是半角字符就返回原来的字符
        return uchar
    if inside_code==0x0020: #除了空格其他的全角半角的公式为:半角=全角-0xfee0
        inside_code=0x3000
    else:
        inside_code+=0xfee0
    return unichr(inside_code)

def Q2B(uchar):
"""全角转半角"""
    inside_code=ord(uchar)
    if inside_code==0x3000:
        inside_code=0x0020
    else:
        inside_code-=0xfee0
    if inside_code<0x0020 or inside_code>0x7e:
        #转完之后不是半角字符返回原来的字符
        return uchar
    return unichr(inside_code)

def stringQ2B(ustring):
"""把字符串全角转半角"""
    return "".join([Q2B(uchar) for uchar in ustring])

def uniform(ustring):
"""格式化字符串，完成全角转半角，大写转小写的工作"""
    return stringQ2B(ustring).lower()

def string2List(ustring):
"""将ustring按照中文，字母，数字分开"""
    retList=[]
    utmp=[]
    for uchar in ustring:
        if is_other(uchar):
            if len(utmp)==0:
                continue
            else:
                retList.append("".join(utmp))
                utmp=[]
        else:
            utmp.append(uchar)
        if len(utmp)!=0:
            retList.append("".join(utmp))
        return retList