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python utf-8字符支持中以`\\ U`和`\\ u`开头的unicode字符有什么区别

[英]what is the difference between unicode characters starting from `\U` and `\u` in python utf-8 characters support

原文 2018-12-04 09:01:55 9 1 python/ mysql

I have 2 strings, both of which translates to the same thing in the end but in one of the representation, mysql adds the data to the db; 我有2个字符串，两个字符串最终都转换为相同的东西，但是在其中一种表示形式中，mysql将数据添加到db中。 in other, it doesn't. 另一方面，事实并非如此。

\?\?\?\?
\\U0001f1fa\\U0001f1f8

I am not able to figure out the difference between these two representations and the reason for 1 format supporting data addition in mysql. 我无法弄清楚这两种表示形式之间的区别，以及1种格式支持mysql中数据添加的原因。 Mysql connection is open in utf-8 mode. Mysql连接以utf-8模式打开。

1 个解决方案

\\U is 32-bit and followed with 8 hex digits, when \\u\u003c/code> is 16-bit and followed by 4 digits. \\U是32位，后跟8个十六进制数字，而\\u\u003c/code>是16位，后跟4个数字。 See ' https://docs.python.org/3/howto/unicode.html ' for example. 例如，请参见“ https://docs.python.org/3/howto/unicode.html ”。

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