在进行文本分析、提取关键词时，新闻评论等文本通常是中英文及其他语言的混杂，若不加处理直接分析，结果往往差强人意。
# 编程之家 (jb51.cc)
s = "China's Legend Holdings will split its several business arms to go public on stock markets,the group's president Zhu Linan said on Tuesday.该集团总裁朱利安周二表示，中国联想控股将分拆其多个业务部门在股市上市。"
result = "".join(i for i in s if ord(i) < 256)
print(result)
# End 512.笔记 jb51.cc@H_403_3@
out:
China's Legend Holdings will split its several business arms to go public on stock markets,the group's president Zhu Linan said on Tuesday.@H_403_3@2、unicode编码识别
# 编程之家 (jb51.cc)
import re
s = "China's Legend Holdings will split its several business arms to go public on stock markets,the group's president Zhu Linan said on Tuesday.该集团总裁朱利安周二表示，中国联想控股将分拆其多个业务部门在股市上市。"
uncn = re.compile(r'[\u0061-\u007a,\u0020]')
en = "".join(uncn.findall(s.lower()))
print(en)
# End 512.笔记 jb51.cc@H_403_3@
out:
chinas legend holdings will split its several business arms to go public on stock markets,the groups president zhu linan said on tuesday
@H_403_3@中文的编码范围是：\u4e00-\u9fa5，相应的[^\u4e00-\u9fa5]可匹配非中文。
匹配英文时，需要将空格[\u0020]加入，不然单词之间没空格了。