How to launch own 2to3 fixer?

问题

I wrote own fixer, how can i run it? I don't find obvious way to do this.

Only this:

> cd /usr/lib/python2.7/lib2to3/fixes/
> ln -s path/to/my_fixer.py

And then run it:

> cd path/to/project
> 2to3 -f my_fixer .

回答1:

I got it! (file: my2to3)

#!/usr/bin/env python2.7
import sys
from lib2to3.main import main

sys.path.append('path/to/my_own_package')
sys.exit(main('my_own_package.contained_fixers'))

And then run it:

> ./my2to3 -f my_fixer -w project

回答2:

• Create a directory /mypath/custom_fixers

• Generate a file /mypath/custom_fixers/fix_custom_fixers.py with this content:

  from lib2to3.fixer_base import BaseFix
  from lib2to3.pgen2 import token
  
  class FixCustomFixers(BaseFix):
  
      _accept_type = token.NAME
  
      def match(self, node):
          if node.value == 'oldname':
              return True
          return False
  
      def transform(self, node, results):
          node.value = 'newname'
          node.changed()
  

• Create a file /mypath/myfixer.py with this content:

  import sys
  from lib2to3.main import main
  sys.exit(main('custom_fixers'))
  

• Run PYTHONPATH=/mypath python3 /mypath/myfixer.py -f custom_fixers python_file_to_fix.py

来源：https://stackoverflow.com/questions/24508357/how-to-launch-own-2to3-fixer