CloudBolt is aiming to support Python 3 by version 8.0, and any custom Plug-ins or Actions must also be updated before upgrading. Here is a brief guide to updating your Python code to be compatible with both Python 2 and 3.
One of the easiest tools to automatically check your plugin compatibility is 2to3. Run it on the source files of your Plug-ins, and a diff against the original source file is printed.
Most Plug-ins and Actions won't be using methods or syntax that have significant changes. But there are a few common differences that you should review.
Print statements need to be a method:
Raising exceptions should also use a method to set a specific error message:
Catching exceptions need to use 'as' instead of a comma:
Unicode changes will impact how data is read from external sources like the 'requests' library:
| Python 2 | Python 3 |
|
r = requests.get(‘https://google.com’) content = r.content() |
r = requests.get(‘https://google.com’) content = r.content.decode() |
String formatting has changed, and the old % formatting is no longer allowed:
| Python 2 | Python 3 |
| “%d %s” % (i, s) | “{} {}”.format(i, s) |
| “%d/%d=%f” % (355, 113, 355/113) | “{:d}/{:d}={:f}”.format(355, 113, 355/113) |
Here are a few excellent resources on the topic that can provide more detailed information:
https://docs.djangoproject.com/en/1.11/topics/python3/
https://docs.python.org/3/howto/pyporting.html#pyporting-howto
http://python-future.org/compatible_idioms.html#strings-and-bytes
If you have any trouble updating your code, please review those resource and then contact CloudBolt support at support@cloudboltsoftware.com.
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