qt string qstring 解析

    我们先分别讨论下python中的string和Qstring

    1. Qstring

        The QString class provides a Unicode character string.

     Qstring是一个unicode编码的string

2.string

String literals
are written in single or double quotes: 'xyzzy', "frobozz".Unicode
strings are much like strings, but are specified in the syntax using a preceding 'u' character: u'abc', u"def". 

可以看出string可以采用asc编码和unicode编码，如果不特别指名，则肯定为Asc-ii编码

 2.1 str()

Return a string
containing a nicely printable representation of an object. For strings, this returns the string itself.its goal is to return a printable string. If no
argument is given, returns the empty string, ''.

2.2 repr()