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__pycache__	[ DIR ]	drwxr-xr-x
__init__.py	47 B	-rw-r--r--
fix_apply.py	2.29 KB	-rw-r--r--
fix_asserts.py	984 B	-rw-r--r--
fix_basestring.py	320 B	-rw-r--r--
fix_buffer.py	590 B	-rw-r--r--
fix_dict.py	3.67 KB	-rw-r--r--
fix_except.py	3.27 KB	-rw-r--r--
fix_exec.py	979 B	-rw-r--r--
fix_execfile.py	2 KB	-rw-r--r--
fix_exitfunc.py	2.44 KB	-rw-r--r--
fix_filter.py	2.7 KB	-rw-r--r--
fix_funcattrs.py	644 B	-rw-r--r--
fix_future.py	547 B	-rw-r--r--
fix_getcwdu.py	451 B	-rw-r--r--
fix_has_key.py	3.12 KB	-rw-r--r--
fix_idioms.py	4.76 KB	-rw-r--r--
fix_import.py	3.18 KB	-rw-r--r--
fix_imports.py	5.55 KB	-rw-r--r--
fix_imports2.py	289 B	-rw-r--r--
fix_input.py	708 B	-rw-r--r--
fix_intern.py	1.12 KB	-rw-r--r--
fix_isinstance.py	1.57 KB	-rw-r--r--
fix_itertools.py	1.51 KB	-rw-r--r--
fix_itertools_imports.py	2.04 KB	-rw-r--r--
fix_long.py	476 B	-rw-r--r--
fix_map.py	3.55 KB	-rw-r--r--
fix_metaclass.py	8 KB	-rw-r--r--
fix_methodattrs.py	606 B	-rw-r--r--
fix_ne.py	571 B	-rw-r--r--
fix_next.py	3.1 KB	-rw-r--r--
fix_nonzero.py	591 B	-rw-r--r--
fix_numliterals.py	768 B	-rw-r--r--
fix_operator.py	3.35 KB	-rw-r--r--
fix_paren.py	1.2 KB	-rw-r--r--
fix_print.py	2.78 KB	-rw-r--r--
fix_raise.py	2.86 KB	-rw-r--r--
fix_raw_input.py	454 B	-rw-r--r--
fix_reduce.py	837 B	-rw-r--r--
fix_reload.py	1.06 KB	-rw-r--r--
fix_renames.py	2.17 KB	-rw-r--r--
fix_repr.py	613 B	-rw-r--r--
fix_set_literal.py	1.66 KB	-rw-r--r--
fix_standarderror.py	449 B	-rw-r--r--
fix_sys_exc.py	1.01 KB	-rw-r--r--
fix_throw.py	1.54 KB	-rw-r--r--
fix_tuple_params.py	5.43 KB	-rw-r--r--
fix_types.py	1.73 KB	-rw-r--r--
fix_unicode.py	1.23 KB	-rw-r--r--
fix_urllib.py	8.17 KB	-rw-r--r--
fix_ws_comma.py	1.06 KB	-rw-r--r--
fix_xrange.py	2.63 KB	-rw-r--r--
fix_xreadlines.py	689 B	-rw-r--r--
fix_zip.py	1.26 KB	-rw-r--r--

Code Editor : fix_idioms.py

"""Adjust some old Python 2 idioms to their modern counterparts.

* Change some type comparisons to isinstance() calls:
    type(x) == T -> isinstance(x, T)
    type(x) is T -> isinstance(x, T)
    type(x) != T -> not isinstance(x, T)
    type(x) is not T -> not isinstance(x, T)

* Change "while 1:" into "while True:".

* Change both

v = list(EXPR)
    v.sort()
    foo(v)

and the more general

v = EXPR
    v.sort()
    foo(v)

into

v = sorted(EXPR)
    foo(v)
"""
# Author: Jacques Frechet, Collin Winter

# Local imports
from .. import fixer_base
from ..fixer_util import Call, Comma, Name, Node, BlankLine, syms

CMP = "(n='!=' | '==' | 'is' | n=comp_op< 'is' 'not' >)"
TYPE = "power< 'type' trailer< '(' x=any ')' > >"

class FixIdioms(fixer_base.BaseFix):
    explicit = True # The user must ask for this fixer

PATTERN = r"""
        isinstance=comparison< %s %s T=any >
        |
        isinstance=comparison< T=any %s %s >
        |
        while_stmt< 'while' while='1' ':' any+ >
        |
        sorted=any<
            any*
            simple_stmt<
              expr_stmt< id1=any '='
                         power< list='list' trailer< '(' (not arglist<any+>) any ')' > >
              >
              '\n'
            >
            sort=
            simple_stmt<
              power< id2=any
                     trailer< '.' 'sort' > trailer< '(' ')' >
              >
              '\n'
            >
            next=any*
        >
        |
        sorted=any<
            any*
            simple_stmt< expr_stmt< id1=any '=' expr=any > '\n' >
            sort=
            simple_stmt<
              power< id2=any
                     trailer< '.' 'sort' > trailer< '(' ')' >
              >
              '\n'
            >
            next=any*
        >
    """ % (TYPE, CMP, CMP, TYPE)

def match(self, node):
        r = super(FixIdioms, self).match(node)
        # If we've matched one of the sort/sorted subpatterns above, we
        # want to reject matches where the initial assignment and the
        # subsequent .sort() call involve different identifiers.
        if r and "sorted" in r:
            if r["id1"] == r["id2"]:
                return r
            return None
        return r

def transform(self, node, results):
        if "isinstance" in results:
            return self.transform_isinstance(node, results)
        elif "while" in results:
            return self.transform_while(node, results)
        elif "sorted" in results:
            return self.transform_sort(node, results)
        else:
            raise RuntimeError("Invalid match")

def transform_isinstance(self, node, results):
        x = results["x"].clone() # The thing inside of type()
        T = results["T"].clone() # The type being compared against
        x.prefix = ""
        T.prefix = " "
        test = Call(Name("isinstance"), [x, Comma(), T])
        if "n" in results:
            test.prefix = " "
            test = Node(syms.not_test, [Name("not"), test])
        test.prefix = node.prefix
        return test

def transform_while(self, node, results):
        one = results["while"]
        one.replace(Name("True", prefix=one.prefix))

def transform_sort(self, node, results):
        sort_stmt = results["sort"]
        next_stmt = results["next"]
        list_call = results.get("list")
        simple_expr = results.get("expr")

if list_call:
            list_call.replace(Name("sorted", prefix=list_call.prefix))
        elif simple_expr:
            new = simple_expr.clone()
            new.prefix = ""
            simple_expr.replace(Call(Name("sorted"), [new],
                                     prefix=simple_expr.prefix))
        else:
            raise RuntimeError("should not have reached here")
        sort_stmt.remove()

btwn = sort_stmt.prefix
        # Keep any prefix lines between the sort_stmt and the list_call and
        # shove them right after the sorted() call.
        if "\n" in btwn:
            if next_stmt:
                # The new prefix should be everything from the sort_stmt's
                # prefix up to the last newline, then the old prefix after a new
                # line.
                prefix_lines = (btwn.rpartition("\n")[0], next_stmt[0].prefix)
                next_stmt[0].prefix = "\n".join(prefix_lines)
            else:
                assert list_call.parent
                assert list_call.next_sibling is None
                # Put a blank line after list_call and set its prefix.
                end_line = BlankLine()
                list_call.parent.append_child(end_line)
                assert list_call.next_sibling is end_line
                # The new prefix should be everything up to the first new line
                # of sort_stmt's prefix.
                end_line.prefix = btwn.rpartition("\n")[0]

${this.title}

Code Editor : fix_idioms.py