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Name	Size	Permission
__pycache__	[ DIR ]	drwxr-xr-x
__init__.py	5.02 KB	-rw-r--r--
fix_UserDict.py	3.75 KB	-rw-r--r--
fix_absolute_import.py	3.07 KB	-rw-r--r--
fix_add__future__imports_excep...	663 B	-rw-r--r--
fix_basestring.py	395 B	-rw-r--r--
fix_bytes.py	685 B	-rw-r--r--
fix_cmp.py	702 B	-rw-r--r--
fix_division.py	229 B	-rw-r--r--
fix_division_safe.py	2.19 KB	-rw-r--r--
fix_execfile.py	922 B	-rw-r--r--
fix_future_builtins.py	1.98 KB	-rw-r--r--
fix_future_standard_library.py	735 B	-rw-r--r--
fix_future_standard_library_ur...	1003 B	-rw-r--r--
fix_metaclass.py	9.34 KB	-rw-r--r--
fix_next_call.py	3.08 KB	-rw-r--r--
fix_object.py	407 B	-rw-r--r--
fix_oldstr_wrap.py	2.5 KB	-rw-r--r--
fix_order___future__imports.py	830 B	-rw-r--r--
fix_print.py	3.3 KB	-rw-r--r--
fix_print_with_import.py	736 B	-rw-r--r--
fix_raise.py	2.12 KB	-rw-r--r--
fix_remove_old__future__import...	852 B	-rw-r--r--
fix_unicode_keep_u.py	780 B	-rw-r--r--
fix_unicode_literals_import.py	372 B	-rw-r--r--
fix_xrange_with_import.py	479 B	-rw-r--r--

Code Editor : fix_division_safe.py

"""
For the ``future`` package.

Adds this import line:

from __future__ import division

at the top and changes any old-style divisions to be calls to
past.utils.old_div so the code runs as before on Py2.6/2.7 and has the same
behaviour on Py3.

If "from __future__ import division" is already in effect, this fixer does
nothing.
"""

from lib2to3 import fixer_base
from lib2to3.fixer_util import syms, does_tree_import
from libfuturize.fixer_util import (token, future_import, touch_import_top,
                                    wrap_in_fn_call)

def match_division(node):
    u"""
    __future__.division redefines the meaning of a single slash for division,
    so we match that and only that.
    """
    slash = token.SLASH
    return node.type == slash and not node.next_sibling.type == slash and \
                                  not node.prev_sibling.type == slash

class FixDivisionSafe(fixer_base.BaseFix):
    # BM_compatible = True
    run_order = 4    # this seems to be ignored?

_accept_type = token.SLASH

PATTERN = """
    term<(not('/') any)+ '/' ((not('/') any))>
    """

def start_tree(self, tree, name):
        """
        Skip this fixer if "__future__.division" is already imported.
        """
        super(FixDivisionSafe, self).start_tree(tree, name)
        self.skip = "division" in tree.future_features

def match(self, node):
        u"""
        Since the tree needs to be fixed once and only once if and only if it
        matches, we can start discarding matches after the first.
        """
        if (node.type == self.syms.term and 
                    len(node.children) == 3 and
                    match_division(node.children[1])):
            expr1, expr2 = node.children[0], node.children[2]
            return expr1, expr2
        else:
            return False

def transform(self, node, results):
        if self.skip:
            return
        future_import(u"division", node)

touch_import_top(u'past.utils', u'old_div', node)
        expr1, expr2 = results[0].clone(), results[1].clone()
        # Strip any leading space for the first number:
        expr1.prefix = u''
        return wrap_in_fn_call("old_div", (expr1, expr2), prefix=node.prefix)

${this.title}

Code Editor : fix_division_safe.py