Convert python 2 code to 3 in PyCharm

Question

I have a large ML project in python 2 code and I just started using PyCharm as an IDE. I\'m currently using WinPython 3.4 and I\'d preferably like to do everything in python

Answer 1

Goto the folder where your python2script.py is existing in command line,

then execute the command:

python C:/python/Tools/scripts/2to3.py -w python2script.py

you can see that your python2scipt.py is updated.

Answer 2

Before anything I would save a backup copy of your Python 2 file first.

You can then try to convert the code using the "2to3" Automated Python 2 to 3 code translation tool which is built into Python via the Standard Library. Details on usage can be found here: https://docs.python.org/2/library/2to3.html#

You also have the choice between two tools to port your code automatically: Modernize and Futurize. Check them out below.

Modernize --> https://python-modernize.readthedocs.io/en/latest/

Futurize --> http://python-future.org/automatic_conversion.html

In terms of Pycharm, I have not seen / don't know of any specialized tool within the IDE that converts code from Python 2 to Python 3. I'd stick to the 3 tools above.

Good luck!

Answer 3

In order to convert your python script from version-2 to version-3, you can simply use 2to3 utility.

On linux terminal -

$ 2to3 my_file.py              # shows output only on terminal

or

$ 2to3 -w my_file.py           # overwrites the file with python-3 code

where my_file.py is the file which you want to convert.

Answer 4

I found a way in Pycharm IDE to convert file from v2 to v3 using 2to3 tool.

I applied in pycharm comunity edition v 2016.2.3 in windows environment.

• click terminal in status bar Now, you are in shell command, in the root of your project.
• type the command (to convert myfile.py):

2to3 myfile.py -w

The tool modifies the code of the file, and your IDE is reflected with the changes.

To modify all your files in the folder, type the command

2to3 . -w

The option -w to actually write the changes. For more details write:

2to3 -h

Answer 5

There's a script included with Python, usually at [Python Root]/Tools/Scripts/2to3.py. You can run that script on a python file (or directory of python files) and it will handle a lot of the conversions, at least for changes in the standard library.

It gets a little more complicated if your project uses other 3rd party libraries. It's possible the API's for those changed during the 2-to-3 transition, and the 2to3.py script will not know about those api changes. Your best bet is to run the conversion script, and then manually make any other changes that are needed.