从字符串中删除每个非utf-8符号

Question

我有大量的文件和解析器.我要做的是剥离所有非utf-8符号并将数据放入mongodb.目前我有这样的代码.

with open(fname, "r") as fp:
    for line in fp:
        line = line.strip()
        line = line.decode('utf-8', 'ignore')
        line = line.encode('utf-8', 'ignore')

不知怎的,我仍然得到一个错误

bson.errors.InvalidStringData: strings in documents must be valid UTF-8: 
1/b62010montecassianomcir\xe2\x86\x90ta0\xe2\x86\x90008923304320733/290066010401040101506055soccorin

我不明白.有一些简单的方法吗？

UPD:似乎Python和Mongo不同意Utf-8 Valid字符串的定义.

Answer 1

尝试下面的代码行而不是最后两行.希望能帮助到你:

line=line.decode('utf-8','ignore').encode("utf-8")

Answer 2

对于python 3,如此线程中的注释所述,您可以执行以下操作:

line = bytes(line, 'utf-8').decode('utf-8', 'ignore')

如果无法解码任何字符,'ignore'参数可防止引发错误.

如果你的行已经是一个字节对象(例如b'my string'),那么你只需要解码它decode('utf-8', 'ignore').

Answer 3

处理无 utf-8 字符的示例

import string

test=u"\n\n\n\n\n\n\n\n\n\n\n\n\n\nHi <<First Name>>\nthis is filler text \xa325 more filler.\nadditilnal filler.\n\nyet more\xa0still more\xa0filler.\n\n\xa0\n\n\n\n\nmore\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nfiller.\x03\n\t\t\t\t\t\t    almost there \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nthe end\n\n\n\n\n\n\n\n\n\n\n\n\n"

print ''.join(x for x in test if x in string.printable)