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Name	Size	Permission
__pycache__	[ DIR ]	drwxr-xr-x
fix_absolute_import.py	3.07 KB	-rw-r--r--
fix_add__future__imports_except_unicode_literals.py	662 B	-rw-r--r--
fix_basestring.py	394 B	-rw-r--r--
fix_bytes.py	685 B	-rw-r--r--
fix_cmp.py	701 B	-rw-r--r--
fix_division.py	228 B	-rw-r--r--
fix_division_safe.py	3.21 KB	-rw-r--r--
fix_execfile.py	921 B	-rw-r--r--
fix_future_builtins.py	1.98 KB	-rw-r--r--
fix_future_standard_library.py	733 B	-rw-r--r--
fix_future_standard_library_urllib.py	1001 B	-rw-r--r--
fix_input.py	687 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	1.19 KB	-rw-r--r--
fix_order___future__imports.py	829 B	-rw-r--r--
fix_print.py	3.3 KB	-rw-r--r--
fix_print_with_import.py	735 B	-rw-r--r--
fix_raise.py	3.79 KB	-rw-r--r--
fix_remove_old__future__imports.py	851 B	-rw-r--r--
fix_unicode_keep_u.py	779 B	-rw-r--r--
fix_unicode_literals_import.py	367 B	-rw-r--r--
fix_UserDict.py	3.75 KB	-rw-r--r--
fix_xrange_with_import.py	479 B	-rw-r--r--
__init__.py	5.11 KB	-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.
"""

import re
from lib2to3.fixer_util import Leaf, Node, Comma
from lib2to3 import fixer_base
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

const_re = re.compile('^[0-9]*[.][0-9]*$')

def is_floaty(node):
    return _is_floaty(node.prev_sibling) or _is_floaty(node.next_sibling)

def _is_floaty(expr):
    if isinstance(expr, list):
        expr = expr[0]

if isinstance(expr, Leaf):
        # If it's a leaf, let's see if it's a numeric constant containing a '.'
        return const_re.match(expr.value)
    elif isinstance(expr, Node):
        # If the expression is a node, let's see if it's a direct cast to float
        if isinstance(expr.children[0], Leaf):
            return expr.children[0].value == u'float'
    return False

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:
            matched = False
            skip = False
            children = []
            for child in node.children:
                if skip:
                    skip = False
                    continue
                if match_division(child) and not is_floaty(child):
                    matched = True

# Strip any leading space for the first number:
                    children[0].prefix = u''

children = [wrap_in_fn_call("old_div",
                                                children + [Comma(), child.next_sibling.clone()],
                                                prefix=node.prefix)]
                    skip = True
                else:
                    children.append(child.clone())
            if matched:
                return Node(node.type, children, fixers_applied=node.fixers_applied)

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)
        return results

${this.title}

Code Editor : fix_division_safe.py