For Python, is the is & amp; quot; // & amp; quot; statement True after a is & amp; quot; // & amp; quot?

For Python, is the is & quot; // & quot; statement True after a = & quot;/& quot?

These two days, when I wrote LCS, I found that

Vc + keys + C1yKOuyOe5 + keys/HU8re1u9hGYWxzZS48L3A + Cgo8cD48aW1nIHNyYz0 = "http://www.2cto.com/uploadfile/Collfiles/20150211/20150211085719250.png" alt = "here write picture description" title = "\">

Note that when the variable determines whether it is equal to a constant in the future, if it is used, it may always be False.

However,

A = "+ "? A is "+"

A = "\\"? A is "\\"

The bool values of the following statement are different. The former is true, and the latter is false...

Thanks @ Kaixuan chongfeng for explaining the blog post in this blog. link. But I still don't understand it...
Http://guilload.com/python-string-interning/
It may be related to escape characters.