Usage: 2to3 [options] file|dir ...

Options:

  -h, --help            show this help message and exit

  -d, --doctests_only   Fix up doctests only

  -f FIX, --fix=FIX     Each FIX specifies a transformation; default: all

  -j PROCESSES, --processes=PROCESSES

                        Run 2to3 concurrently

  -x NOFIX, --nofix=NOFIX

                        Prevent a transformation from being run

  -l, --list-fixes      List available transformations

  -p, --print-function  Modify the grammar so that print() is a function

  -v, --verbose         More verbose logging

  --no-diffs            Don't show diffs of the refactoring

  -w, --write           Write back modified files

  -n, --nobackups       Don't write backups for modified files

  -o OUTPUT_DIR, --output-dir=OUTPUT_DIR

                        Put output files in this directory instead of

                        overwriting the input files.  Requires -n.

  -W, --write-unchanged-files

                        Also write files even if no changes were required

                        (useful with --output-dir); implies -w.

  --add-suffix=ADD_SUFFIX

                        Append this string to all output filenames. Requires

                        -n if non-empty.  ex: --add-suffix='' will generate

                        .py3 files.

Available transformations for the -f/--fix option:

blank_lines

compound_statements

extraneous_whitespace

imports_on_separate_lines

indentation

maximum_line_length

missing_newline

missing_whitespace

tabs

trailing_blank_lines

trailing_whitespace

whitespace_around_operator

whitespace_before_inline_comment

whitespace_before_parameters

import math, sys;

def example1():

    ####This is a long comment. This should be wrapped to fit within 72 characters.

    some_tuple=(   1,2, 3,'a'  );

    some_variable={'long':'Long code lines should be wrapped within 79 characters.',

    'other':[math.pi, 100,200,300,9876543210,'This is a long string that goes on'],

    'more':{'inner':'This whole logical line should be wrapped.',some_tuple:[1,

    20,300,40000,500000000,60000000000000000]}}

    return (some_tuple, some_variable)

def example2(): return {'has_key() is deprecated':True}.has_key({'f':2}.has_key(''));

class Example3(   object ):

    def __init__    ( self, bar ):

     #Comments should have a space after the hash.

     if bar : bar+=1;  bar=bar* bar   ; return bar

     else:

                    some_string = """

                       Indentation in multiline strings should not be touched.

Only actual code should be reindented.

"""

                    return (sys.path, some_string)