I've made an attempt to create a Python3 compatible version of protobufs.
I have some code that passes pretty much all the unit tests which I've
I probably won't have a chance to look at this again for a couple weeks if
not longer, so I want to get it out there. In my attempt I decided to
follow the advice in another post, and treat python3 as a new language. To
get python3 working, you'll have to compile the C code. There are also a
few issues I ran into along the way:
- I decided to use strings where unicode is used in Python 2. I was
originally going to try to use bytes/bytearrays, but they do not support >8
bit characters, and some of the setup.py tests use "exotic" 16 bit chrs.
(Warning: I might have something conceptually wrong here)
- There are places where byte data is stored as strings, then converted
to unicode. I ended up converting strings (I called them bytestr's) to
normal strings. I'm not sure this is done correctly everywhere though.
- Data is packed/unpacked using struct.pack/unpack which is done using
bytes instead of strings in Python3. I have simple string_to_bytes() and
bytes_to_string() functions to do this.
What's left is:
- There are a couple Exceptions that I don't throw. They are supposed
to be where the Python2 code converts from unicode strings to regular
strings. I am definitely missing something conceptually here - I haven't
figured out how Python 2x supports strings with "exotic" characters, but
not strings like u'a\x80a'. If someone can solve this problem & figure out
when to throw the exceptions Python3 will be *fully* working.
I might have small bits of time here or there but I don't think I can
devote the time I need to get this finished for several weeks, so if
someone wants to finish this up, feel free to fork this code. If anyone
wants to see what I did, the best way to do this is to diff between the
latest commit and commit 49ccf5d8b3b688c335dc35bcb9f219eca78c7210.
You received this message because you are subscribed to the Google Groups
"Protocol Buffers" group.
To view this discussion on the web visit
To post to this group, send email to email@example.com.
To unsubscribe from this group, send email to
For more options, visit this group at