python根据unicode判断语言类型实例代码

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