python 检查是否为中文字符串的方法

def check_contain_chinese(check_str):
 for ch in check_str:
 if u'\u4e00' <= ch <= u'\u9fff':
  return True 
 else:
  return False

check_contain_chinese('abcc')
False
check_contain_chinese('123')
False
check_contain_chinese('中文')
True

#检验是否含有中文字符
def isContainChinese(s):
 for c in s:
 if ('\u4e00' <= c <= '\u9fa5'):
  return True
 return False
 
#检验是否全是中文字符
def isAllChinese(s):
 for c in s:
 if not('\u4e00' <= c <= '\u9fa5'):
  return False
 return True