[Python-Dev] Question about the current implementation of str (original) (raw)

Larry Hastings larry at hastings.org
Fri Apr 8 20:56:10 EDT 2016

I have a straightforward question about the str object, specifically the PyUnicodeObject. I've tried reading the source to answer the question myself but it's nearly impenetrable. So I was hoping someone here who understands the current implementation could answer it for me.

Although the str object is immutable from Python's perspective, the C object itself is mutable. For example, for dynamically-created strings the hash field may be lazy-computed and cached inside the object. I was wondering if there were other fields like this. For example, are there similar lazy-computed cached objects for the different encoded versions (utf8 utf16) of the str? What would really help an exhaustive list of the fields of a str object that may ever change after the object's initial creation. Thanks!

We now return you to the debate about the pathlib module,

//arry/ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.python.org/pipermail/python-dev/attachments/20160408/b0c2638c/attachment.html>

More information about the Python-Dev mailing list