具有转义序列的字节对象的不同输出(Python Pandas Msgpack)

Question

据我所知，Python用\表示转义序列。因此，如果我尝试在字符串中插入一个反斜杠，我会得到带有双反斜杠的字符串变量，如下所示：

x = '/x91/x84/xa4/x74'
b = x.replace(r'/', '\\')


>>> b
'\\x91\\x84\\xa4\\x74'

但是，如果我有两个字节对象-一个具有单反斜杠，另一个具有双反斜杠，并将它们分别提供给pandas.read_msgpack()函数，为什么它在每种情况下都会给出不同的输出？请看下面我尝试过的内容：

byte_obj1 = b'\x91\x84\xa4\x74\x69\x6d\x65\x92\xcb\x41\xdd\xcd\x65\x00\x00\x00\x00\xcb\x41\xdd\xcd\x65\x00\x00\xa3\xd7\xa4\x76\x61\x72\x30\x92\xcb\x40\x49\x0c\xcc\xcc\xcc\xcc\xcd\xcb\x40\x49\x0c\xcc\xcc\xcc\xcc\xcd\xa4\x76\x61\x72\x31\x92\xcb\xff\xf8\x00\x00\x00\x00\x00\x00\xcb\x40\x4e\x0c\xcc\xcc\xcc\xcc\xcd\xa4\x76\x61\x72\x32\x92\xcb\xff\xf8\x00\x00\x00\x00\x00\x00\xcb\xff\xf8\x00\x00\x00\x00\x00\x00'

d1=pandas.read_msgpack(byte_obj1)
>>> d1 
({'time': (2000000000.0, 2000000000.01), 'var0': (50.1, 50.1), 'var1': (nan, 60.1), 'var2': (nan, nan)},)

byte_obj2=
    b'\\x91\\x84\\xa4\\x74\\x69\\x6d\\x65\\x92\\xcb\\x41\\xdd\\xcd\\x65\\x00\\x00\\x00\\x00\\xcb\\x41\\xdd\\xcd\\x65\\x00\\x00\\xa3\\xd7\\xa4\\x76\\x61\\x72\\x30\\x92\\xcb\\x40\\x49\\x0c\\xcc\\xcc\\xcc\\xcc\\xcd\\xcb\\x40\\x49\\x0c\\xcc\\xcc\\xcc\\xcc\\xcd\\xa4\\x76\\x61\\x72\\x31\\x92\\xcb\\xff\\xf8\\x00\\x00\\x00\\x00\\x00\\x00\\xcb\\x40\\x4e\\x0c\\xcc\\xcc\\xcc\\xcc\\xcd\\xa4\\x76\\x61\\x72\\x32\\x92\\xcb\\xff\\xf8\\x00\\x00\\x00\\x00\\x00\\x00\\xcb\\xff\\xf8\\x00\\x00\\x00\\x00\\x00\\x00'

d2=pandas.read_msgpack(byte_obj2)
>>> d2 
[92, 120, 57, 49, 92, 120, 56, 52, 92, 120, 97, 52, 92, 120, 55, 52, 92, 120, 54, 57, 92, 120, 54, 100, 92, 120, 54, 53, 92, 120, 57, 50, 92, 120, 99, 98, 92, 120, 52, 49, 92, 120, 100, 100, 92, 120, 99, 100, 92, 120, 54, 53, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 99, 98, 92, 120, 52, 49, 92, 120, 100, 100, 92, 120, 99, 100, 92, 120, 54, 53, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 97, 51, 92, 120, 100, 55, 92, 120, 97, 52, 92, 120, 55, 54, 92, 120, 54, 49, 92, 120, 55, 50, 92, 120, 51, 48, 92, 120, 57, 50, 92, 120, 99, 98, 92, 120, 52, 48, 92, 120, 52, 57, 92, 120, 48, 99, 92, 120, 99, 99, 92, 120, 99, 99, 92, 120, 99, 99, 92, 120, 99, 99, 92, 120, 99, 100, 92, 120, 99, 98, 92, 120, 52, 48, 92, 120, 52, 57, 92, 120, 48, 99, 92, 120, 99, 99, 92, 120, 99, 99, 92, 120, 99, 99, 92, 120, 99, 99, 92, 120, 99, 100, 92, 120, 97, 52, 92, 120, 55, 54, 92, 120, 54, 49, 92, 120, 55, 50, 92, 120, 51, 49, 92, 120, 57, 50, 92, 120, 99, 98, 92, 120, 102, 102, 92, 120, 102, 56, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 99, 98, 92, 120, 52, 48, 92, 120, 52, 101, 92, 120, 48, 99, 92, 120, 99, 99, 92, 120, 99, 99, 92, 120, 99, 99, 92, 120, 99, 99, 92, 120, 99, 100, 92, 120, 97, 52, 92, 120, 55, 54, 92, 120, 54, 49, 92, 120, 55, 50, 92, 120, 51, 50, 92, 120, 57, 50, 92, 120, 99, 98, 92, 120, 102, 102, 92, 120, 102, 56, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 99, 98, 92, 120, 102, 102, 92, 120, 102, 56, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 48, 48, 92, 120, 48, 48]

为什么Python不考虑双重回补和'\‘，和转义序列的情况一样？有没有人能帮我解决这个难题。非常提前感谢您。

Answer 1

在初始设置中，您编写了x= '/x91/x84/xa4/x74‘。这些是正斜杠，而不是反斜杠。python中的反斜杠是转义字符，因此双反斜杠中的第一个反斜杠用作第二个反斜杠的转义字符。