ꦫꦣꦺꦤ꧀ꦄꦤ꧀ꦠꦱꦺꦤ

PATH: usr / lib64 / python3.6 / lib2to3 / fixes

# Copyright 2007 Google, Inc. All Rights Reserved.
# Licensed to PSF under a Contributor Agreement.

"""Fixer that changes map(F, ...) into list(map(F, ...)) unless there
exists a 'from future_builtins import map' statement in the top-level
namespace.

As a special case, map(None, X) is changed into list(X).  (This is
necessary because the semantics are changed in this case -- the new
map(None, X) is equivalent to [(x,) for x in X].)

We avoid the transformation (except for the special case mentioned
above) if the map() call is directly contained in iter(<>), list(<>),
tuple(<>), sorted(<>), ...join(<>), or for V in <>:.

NOTE: This is still not correct if the original code was depending on
map(F, X, Y, ...) to go on until the longest argument is exhausted,
substituting None for missing values -- like zip(), it now stops as
soon as the shortest argument is exhausted.
"""

# Local imports
from ..pgen2 import token
from .. import fixer_base
from ..fixer_util import Name, ArgList, Call, ListComp, in_special_context
from ..pygram import python_symbols as syms
from ..pytree import Node

class FixMap(fixer_base.ConditionalFix):
    BM_compatible = True

PATTERN = """
    map_none=power<
        'map'
        trailer< '(' arglist< 'None' ',' arg=any [','] > ')' >
        [extra_trailers=trailer*]
    >
    |
    map_lambda=power<
        'map'
        trailer<
            '('
            arglist<
                lambdef< 'lambda'
                         (fp=NAME | vfpdef< '(' fp=NAME ')'> ) ':' xp=any
                >
                ','
                it=any
            >
            ')'
        >
        [extra_trailers=trailer*]
    >
    |
    power<
        'map' args=trailer< '(' [any] ')' >
        [extra_trailers=trailer*]
    >
    """

skip_on = 'future_builtins.map'

def transform(self, node, results):
        if self.should_skip(node):
            return

trailers = []
        if 'extra_trailers' in results:
            for t in results['extra_trailers']:
                trailers.append(t.clone())

if node.parent.type == syms.simple_stmt:
            self.warning(node, "You should use a for loop here")
            new = node.clone()
            new.prefix = ""
            new = Call(Name("list"), [new])
        elif "map_lambda" in results:
            new = ListComp(results["xp"].clone(),
                           results["fp"].clone(),
                           results["it"].clone())
            new = Node(syms.power, [new] + trailers, prefix="")

else:
            if "map_none" in results:
                new = results["arg"].clone()
                new.prefix = ""
            else:
                if "args" in results:
                    args = results["args"]
                    if args.type == syms.trailer and \
                       args.children[1].type == syms.arglist and \
                       args.children[1].children[0].type == token.NAME and \
                       args.children[1].children[0].value == "None":
                        self.warning(node, "cannot convert map(None, ...) "
                                     "with multiple arguments because map() "
                                     "now truncates to the shortest sequence")
                        return

new = Node(syms.power, [Name("map"), args.clone()])
                    new.prefix = ""

if in_special_context(node):
                    return None

new = Node(syms.power, [Name("list"), ArgList([new])] + trailers)
            new.prefix = ""

new.prefix = node.prefix
        return new

[-] fix_urllib.py [edit]
[-] fix_standarderror.py [edit]
[-] fix_imports.py [edit]
[-] fix_getcwdu.py [edit]
[-] fix_nonzero.py [edit]
[-] fix_itertools.py [edit]
[-] fix_xrange.py [edit]
[-] fix_metaclass.py [edit]
[-] fix_methodattrs.py [edit]
[+] ..
[-] fix_ne.py [edit]
[-] fix_repr.py [edit]
[-] fix_zip.py [edit]
[-] fix_exec.py [edit]
[-] fix_print.py [edit]
[-] fix_paren.py [edit]
[-] fix_imports2.py [edit]
[-] fix_apply.py [edit]
[-] fix_ws_comma.py [edit]
[-] fix_dict.py [edit]
[-] fix_buffer.py [edit]
[-] fix_intern.py [edit]
[-] fix_next.py [edit]
[-] fix_itertools_imports.py [edit]
[-] fix_throw.py [edit]
[+] __pycache__
[-] fix_long.py [edit]
[-] fix_raw_input.py [edit]
[-] fix_future.py [edit]
[-] fix_exitfunc.py [edit]
[-] fix_renames.py [edit]
[-] fix_input.py [edit]
[-] fix_reduce.py [edit]
[-] fix_operator.py [edit]
[-] fix_numliterals.py [edit]
[-] fix_isinstance.py [edit]
[-] fix_basestring.py [edit]
[-] fix_filter.py [edit]
[-] fix_raise.py [edit]
[-] fix_types.py [edit]
[-] fix_funcattrs.py [edit]
[-] fix_set_literal.py [edit]
[-] __init__.py [edit]
[-] fix_execfile.py [edit]
[-] fix_unicode.py [edit]
[-] fix_reload.py [edit]
[-] fix_import.py [edit]
[-] fix_sys_exc.py [edit]
[-] fix_asserts.py [edit]
[-] fix_map.py [edit]
[-] fix_tuple_params.py [edit]
[-] fix_xreadlines.py [edit]
[-] fix_except.py [edit]
[-] fix_has_key.py [edit]
[-] fix_idioms.py [edit]