Current Dir: /snap/core22/2437/usr/lib/python3.10/lib2to3/fixes/

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

Viewing: /snap/core22/2437/usr/lib/python3.10/lib2to3/fixes/fix_itertools_imports.py

""" Fixer for imports of itertools.(imap|ifilter|izip|ifilterfalse) """

# Local imports
from lib2to3 import fixer_base
from lib2to3.fixer_util import BlankLine, syms, token


class FixItertoolsImports(fixer_base.BaseFix):
    BM_compatible = True
    PATTERN = """
              import_from< 'from' 'itertools' 'import' imports=any >
              """ %(locals())

    def transform(self, node, results):
        imports = results['imports']
        if imports.type == syms.import_as_name or not imports.children:
            children = [imports]
        else:
            children = imports.children
        for child in children[::2]:
            if child.type == token.NAME:
                member = child.value
                name_node = child
            elif child.type == token.STAR:
                # Just leave the import as is.
                return
            else:
                assert child.type == syms.import_as_name
                name_node = child.children[0]
            member_name = name_node.value
            if member_name in ('imap', 'izip', 'ifilter'):
                child.value = None
                child.remove()
            elif member_name in ('ifilterfalse', 'izip_longest'):
                node.changed()
                name_node.value = ('filterfalse' if member_name[1] == 'f'
                                   else 'zip_longest')

        # Make sure the import statement is still sane
        children = imports.children[:] or [imports]
        remove_comma = True
        for child in children:
            if remove_comma and child.type == token.COMMA:
                child.remove()
            else:
                remove_comma ^= True

        while children and children[-1].type == token.COMMA:
            children.pop().remove()

        # If there are no imports left, just get rid of the entire statement
        if (not (imports.children or getattr(imports, 'value', None)) or
            imports.parent is None):
            p = node.prefix
            node = BlankLine()
            node.prefix = p
            return node


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