python处理emoji表情

爬到有表情的内容存mysql会报错，mongodb则没有事，解决办法去除表情后存储。

pypi有现成的库emoji来处理emoji字符串： https://pypi.org/project/emoji/

安装：

pip install emoji --upgrade

eg：

>> import emoji
>> print(emoji.emojize('Python is :thumbs_up:'))
Python is ????
>> print(emoji.emojize('Python is :thumbsup:', use_aliases=True))
Python is ????
>> print(emoji.demojize('Python is ????'))
Python is :thumbs_up:

替换函数

def filter_emoji(desstr,restr=''):
    #过滤表情
    try:
        co = re.compile(u'[\U00010000-\U0010ffff]')
    except re.error:
        co = re.compile(u'[\uD800-\uDBFF][\uDC00-\uDFFF]')
    return co.sub(restr, desstr)

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