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File: fix_set_literal.py
""" Optional fixer to transform set() calls to set literals. """ # Author: Benjamin Peterson from lib2to3 import fixer_base, pytree from lib2to3.fixer_util import token, syms class FixSetLiteral(fixer_base.BaseFix): BM_compatible = True explicit = True PATTERN = """power< 'set' trailer< '(' (atom=atom< '[' (items=listmaker< any ((',' any)* [',']) > | single=any) ']' > | atom< '(' items=testlist_gexp< any ((',' any)* [',']) > ')' > ) ')' > > """ def transform(self, node, results): single = results.get("single") if single: # Make a fake listmaker fake = pytree.Node(syms.listmaker, [single.clone()]) single.replace(fake) items = fake else: items = results["items"] # Build the contents of the literal literal = [pytree.Leaf(token.LBRACE, "{")] literal.extend(n.clone() for n in items.children) literal.append(pytree.Leaf(token.RBRACE, "}")) # Set the prefix of the right brace to that of the ')' or ']' literal[-1].prefix = items.next_sibling.prefix maker = pytree.Node(syms.dictsetmaker, literal) maker.prefix = node.prefix # If the original was a one tuple, we need to remove the extra comma. if len(maker.children) == 4: n = maker.children[2] n.remove() maker.children[-1].prefix = n.prefix # Finally, replace the set call with our shiny new literal. return maker
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__init__.py
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fix_apply.py
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fix_asserts.py
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fix_basestring.py
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fix_buffer.py
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fix_dict.py
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fix_except.py
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fix_exec.py
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fix_execfile.py
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fix_exitfunc.py
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fix_filter.py
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fix_funcattrs.py
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fix_future.py
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fix_getcwdu.py
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fix_has_key.py
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fix_idioms.py
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fix_import.py
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fix_input.py
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fix_intern.py
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fix_isinstance.py
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fix_itertools.py
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fix_itertools_imports.py
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fix_long.py
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fix_map.py
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fix_metaclass.py
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fix_ne.py
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fix_next.py
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fix_nonzero.py
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fix_numliterals.py
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fix_operator.py
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fix_paren.py
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fix_set_literal.py
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fix_standarderror.py
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fix_sys_exc.py
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fix_throw.py
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fix_tuple_params.py
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fix_types.py
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fix_unicode.py
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fix_urllib.py
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fix_ws_comma.py
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fix_xrange.py
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