--- /dev/null
+"""
+blib2to3 Node/Leaf transformation-related utility functions.
+"""
+
+import sys
+from typing import (
+ Collection,
+ Generic,
+ Iterator,
+ List,
+ Optional,
+ Set,
+ Tuple,
+ TypeVar,
+ Union,
+)
+
+if sys.version_info < (3, 8):
+ from typing_extensions import Final
+else:
+ from typing import Final
+
+# lib2to3 fork
+from blib2to3.pytree import Node, Leaf, type_repr
+from blib2to3 import pygram
+from blib2to3.pgen2 import token
+
+from black.cache import CACHE_DIR
+from black.strings import has_triple_quotes
+
+
+pygram.initialize(CACHE_DIR)
+syms = pygram.python_symbols
+
+
+# types
+T = TypeVar("T")
+LN = Union[Leaf, Node]
+LeafID = int
+NodeType = int
+
+
+WHITESPACE: Final = {token.DEDENT, token.INDENT, token.NEWLINE}
+STATEMENT: Final = {
+ syms.if_stmt,
+ syms.while_stmt,
+ syms.for_stmt,
+ syms.try_stmt,
+ syms.except_clause,
+ syms.with_stmt,
+ syms.funcdef,
+ syms.classdef,
+}
+STANDALONE_COMMENT: Final = 153
+token.tok_name[STANDALONE_COMMENT] = "STANDALONE_COMMENT"
+LOGIC_OPERATORS: Final = {"and", "or"}
+COMPARATORS: Final = {
+ token.LESS,
+ token.GREATER,
+ token.EQEQUAL,
+ token.NOTEQUAL,
+ token.LESSEQUAL,
+ token.GREATEREQUAL,
+}
+MATH_OPERATORS: Final = {
+ token.VBAR,
+ token.CIRCUMFLEX,
+ token.AMPER,
+ token.LEFTSHIFT,
+ token.RIGHTSHIFT,
+ token.PLUS,
+ token.MINUS,
+ token.STAR,
+ token.SLASH,
+ token.DOUBLESLASH,
+ token.PERCENT,
+ token.AT,
+ token.TILDE,
+ token.DOUBLESTAR,
+}
+STARS: Final = {token.STAR, token.DOUBLESTAR}
+VARARGS_SPECIALS: Final = STARS | {token.SLASH}
+VARARGS_PARENTS: Final = {
+ syms.arglist,
+ syms.argument, # double star in arglist
+ syms.trailer, # single argument to call
+ syms.typedargslist,
+ syms.varargslist, # lambdas
+}
+UNPACKING_PARENTS: Final = {
+ syms.atom, # single element of a list or set literal
+ syms.dictsetmaker,
+ syms.listmaker,
+ syms.testlist_gexp,
+ syms.testlist_star_expr,
+}
+TEST_DESCENDANTS: Final = {
+ syms.test,
+ syms.lambdef,
+ syms.or_test,
+ syms.and_test,
+ syms.not_test,
+ syms.comparison,
+ syms.star_expr,
+ syms.expr,
+ syms.xor_expr,
+ syms.and_expr,
+ syms.shift_expr,
+ syms.arith_expr,
+ syms.trailer,
+ syms.term,
+ syms.power,
+}
+ASSIGNMENTS: Final = {
+ "=",
+ "+=",
+ "-=",
+ "*=",
+ "@=",
+ "/=",
+ "%=",
+ "&=",
+ "|=",
+ "^=",
+ "<<=",
+ ">>=",
+ "**=",
+ "//=",
+}
+
+IMPLICIT_TUPLE = {syms.testlist, syms.testlist_star_expr, syms.exprlist}
+BRACKET = {token.LPAR: token.RPAR, token.LSQB: token.RSQB, token.LBRACE: token.RBRACE}
+OPENING_BRACKETS = set(BRACKET.keys())
+CLOSING_BRACKETS = set(BRACKET.values())
+BRACKETS = OPENING_BRACKETS | CLOSING_BRACKETS
+ALWAYS_NO_SPACE = CLOSING_BRACKETS | {token.COMMA, STANDALONE_COMMENT}
+
+RARROW = 55
+
+
+class Visitor(Generic[T]):
+ """Basic lib2to3 visitor that yields things of type `T` on `visit()`."""
+
+ def visit(self, node: LN) -> Iterator[T]:
+ """Main method to visit `node` and its children.
+
+ It tries to find a `visit_*()` method for the given `node.type`, like
+ `visit_simple_stmt` for Node objects or `visit_INDENT` for Leaf objects.
+ If no dedicated `visit_*()` method is found, chooses `visit_default()`
+ instead.
+
+ Then yields objects of type `T` from the selected visitor.
+ """
+ if node.type < 256:
+ name = token.tok_name[node.type]
+ else:
+ name = str(type_repr(node.type))
+ # We explicitly branch on whether a visitor exists (instead of
+ # using self.visit_default as the default arg to getattr) in order
+ # to save needing to create a bound method object and so mypyc can
+ # generate a native call to visit_default.
+ visitf = getattr(self, f"visit_{name}", None)
+ if visitf:
+ yield from visitf(node)
+ else:
+ yield from self.visit_default(node)
+
+ def visit_default(self, node: LN) -> Iterator[T]:
+ """Default `visit_*()` implementation. Recurses to children of `node`."""
+ if isinstance(node, Node):
+ for child in node.children:
+ yield from self.visit(child)
+
+
+def whitespace(leaf: Leaf, *, complex_subscript: bool) -> str: # noqa: C901
+ """Return whitespace prefix if needed for the given `leaf`.
+
+ `complex_subscript` signals whether the given leaf is part of a subscription
+ which has non-trivial arguments, like arithmetic expressions or function calls.
+ """
+ NO = ""
+ SPACE = " "
+ DOUBLESPACE = " "
+ t = leaf.type
+ p = leaf.parent
+ v = leaf.value
+ if t in ALWAYS_NO_SPACE:
+ return NO
+
+ if t == token.COMMENT:
+ return DOUBLESPACE
+
+ assert p is not None, f"INTERNAL ERROR: hand-made leaf without parent: {leaf!r}"
+ if t == token.COLON and p.type not in {
+ syms.subscript,
+ syms.subscriptlist,
+ syms.sliceop,
+ }:
+ return NO
+
+ prev = leaf.prev_sibling
+ if not prev:
+ prevp = preceding_leaf(p)
+ if not prevp or prevp.type in OPENING_BRACKETS:
+ return NO
+
+ if t == token.COLON:
+ if prevp.type == token.COLON:
+ return NO
+
+ elif prevp.type != token.COMMA and not complex_subscript:
+ return NO
+
+ return SPACE
+
+ if prevp.type == token.EQUAL:
+ if prevp.parent:
+ if prevp.parent.type in {
+ syms.arglist,
+ syms.argument,
+ syms.parameters,
+ syms.varargslist,
+ }:
+ return NO
+
+ elif prevp.parent.type == syms.typedargslist:
+ # A bit hacky: if the equal sign has whitespace, it means we
+ # previously found it's a typed argument. So, we're using
+ # that, too.
+ return prevp.prefix
+
+ elif prevp.type in VARARGS_SPECIALS:
+ if is_vararg(prevp, within=VARARGS_PARENTS | UNPACKING_PARENTS):
+ return NO
+
+ elif prevp.type == token.COLON:
+ if prevp.parent and prevp.parent.type in {syms.subscript, syms.sliceop}:
+ return SPACE if complex_subscript else NO
+
+ elif (
+ prevp.parent
+ and prevp.parent.type == syms.factor
+ and prevp.type in MATH_OPERATORS
+ ):
+ return NO
+
+ elif (
+ prevp.type == token.RIGHTSHIFT
+ and prevp.parent
+ and prevp.parent.type == syms.shift_expr
+ and prevp.prev_sibling
+ and prevp.prev_sibling.type == token.NAME
+ and prevp.prev_sibling.value == "print" # type: ignore
+ ):
+ # Python 2 print chevron
+ return NO
+ elif prevp.type == token.AT and p.parent and p.parent.type == syms.decorator:
+ # no space in decorators
+ return NO
+
+ elif prev.type in OPENING_BRACKETS:
+ return NO
+
+ if p.type in {syms.parameters, syms.arglist}:
+ # untyped function signatures or calls
+ if not prev or prev.type != token.COMMA:
+ return NO
+
+ elif p.type == syms.varargslist:
+ # lambdas
+ if prev and prev.type != token.COMMA:
+ return NO
+
+ elif p.type == syms.typedargslist:
+ # typed function signatures
+ if not prev:
+ return NO
+
+ if t == token.EQUAL:
+ if prev.type != syms.tname:
+ return NO
+
+ elif prev.type == token.EQUAL:
+ # A bit hacky: if the equal sign has whitespace, it means we
+ # previously found it's a typed argument. So, we're using that, too.
+ return prev.prefix
+
+ elif prev.type != token.COMMA:
+ return NO
+
+ elif p.type == syms.tname:
+ # type names
+ if not prev:
+ prevp = preceding_leaf(p)
+ if not prevp or prevp.type != token.COMMA:
+ return NO
+
+ elif p.type == syms.trailer:
+ # attributes and calls
+ if t == token.LPAR or t == token.RPAR:
+ return NO
+
+ if not prev:
+ if t == token.DOT:
+ prevp = preceding_leaf(p)
+ if not prevp or prevp.type != token.NUMBER:
+ return NO
+
+ elif t == token.LSQB:
+ return NO
+
+ elif prev.type != token.COMMA:
+ return NO
+
+ elif p.type == syms.argument:
+ # single argument
+ if t == token.EQUAL:
+ return NO
+
+ if not prev:
+ prevp = preceding_leaf(p)
+ if not prevp or prevp.type == token.LPAR:
+ return NO
+
+ elif prev.type in {token.EQUAL} | VARARGS_SPECIALS:
+ return NO
+
+ elif p.type == syms.decorator:
+ # decorators
+ return NO
+
+ elif p.type == syms.dotted_name:
+ if prev:
+ return NO
+
+ prevp = preceding_leaf(p)
+ if not prevp or prevp.type == token.AT or prevp.type == token.DOT:
+ return NO
+
+ elif p.type == syms.classdef:
+ if t == token.LPAR:
+ return NO
+
+ if prev and prev.type == token.LPAR:
+ return NO
+
+ elif p.type in {syms.subscript, syms.sliceop}:
+ # indexing
+ if not prev:
+ assert p.parent is not None, "subscripts are always parented"
+ if p.parent.type == syms.subscriptlist:
+ return SPACE
+
+ return NO
+
+ elif not complex_subscript:
+ return NO
+
+ elif p.type == syms.atom:
+ if prev and t == token.DOT:
+ # dots, but not the first one.
+ return NO
+
+ elif p.type == syms.dictsetmaker:
+ # dict unpacking
+ if prev and prev.type == token.DOUBLESTAR:
+ return NO
+
+ elif p.type in {syms.factor, syms.star_expr}:
+ # unary ops
+ if not prev:
+ prevp = preceding_leaf(p)
+ if not prevp or prevp.type in OPENING_BRACKETS:
+ return NO
+
+ prevp_parent = prevp.parent
+ assert prevp_parent is not None
+ if prevp.type == token.COLON and prevp_parent.type in {
+ syms.subscript,
+ syms.sliceop,
+ }:
+ return NO
+
+ elif prevp.type == token.EQUAL and prevp_parent.type == syms.argument:
+ return NO
+
+ elif t in {token.NAME, token.NUMBER, token.STRING}:
+ return NO
+
+ elif p.type == syms.import_from:
+ if t == token.DOT:
+ if prev and prev.type == token.DOT:
+ return NO
+
+ elif t == token.NAME:
+ if v == "import":
+ return SPACE
+
+ if prev and prev.type == token.DOT:
+ return NO
+
+ elif p.type == syms.sliceop:
+ return NO
+
+ return SPACE
+
+
+def preceding_leaf(node: Optional[LN]) -> Optional[Leaf]:
+ """Return the first leaf that precedes `node`, if any."""
+ while node:
+ res = node.prev_sibling
+ if res:
+ if isinstance(res, Leaf):
+ return res
+
+ try:
+ return list(res.leaves())[-1]
+
+ except IndexError:
+ return None
+
+ node = node.parent
+ return None
+
+
+def prev_siblings_are(node: Optional[LN], tokens: List[Optional[NodeType]]) -> bool:
+ """Return if the `node` and its previous siblings match types against the provided
+ list of tokens; the provided `node`has its type matched against the last element in
+ the list. `None` can be used as the first element to declare that the start of the
+ list is anchored at the start of its parent's children."""
+ if not tokens:
+ return True
+ if tokens[-1] is None:
+ return node is None
+ if not node:
+ return False
+ if node.type != tokens[-1]:
+ return False
+ return prev_siblings_are(node.prev_sibling, tokens[:-1])
+
+
+def last_two_except(leaves: List[Leaf], omit: Collection[LeafID]) -> Tuple[Leaf, Leaf]:
+ """Return (penultimate, last) leaves skipping brackets in `omit` and contents."""
+ stop_after = None
+ last = None
+ for leaf in reversed(leaves):
+ if stop_after:
+ if leaf is stop_after:
+ stop_after = None
+ continue
+
+ if last:
+ return leaf, last
+
+ if id(leaf) in omit:
+ stop_after = leaf.opening_bracket
+ else:
+ last = leaf
+ else:
+ raise LookupError("Last two leaves were also skipped")
+
+
+def parent_type(node: Optional[LN]) -> Optional[NodeType]:
+ """
+ Returns:
+ @node.parent.type, if @node is not None and has a parent.
+ OR
+ None, otherwise.
+ """
+ if node is None or node.parent is None:
+ return None
+
+ return node.parent.type
+
+
+def child_towards(ancestor: Node, descendant: LN) -> Optional[LN]:
+ """Return the child of `ancestor` that contains `descendant`."""
+ node: Optional[LN] = descendant
+ while node and node.parent != ancestor:
+ node = node.parent
+ return node
+
+
+def replace_child(old_child: LN, new_child: LN) -> None:
+ """
+ Side Effects:
+ * If @old_child.parent is set, replace @old_child with @new_child in
+ @old_child's underlying Node structure.
+ OR
+ * Otherwise, this function does nothing.
+ """
+ parent = old_child.parent
+ if not parent:
+ return
+
+ child_idx = old_child.remove()
+ if child_idx is not None:
+ parent.insert_child(child_idx, new_child)
+
+
+def container_of(leaf: Leaf) -> LN:
+ """Return `leaf` or one of its ancestors that is the topmost container of it.
+
+ By "container" we mean a node where `leaf` is the very first child.
+ """
+ same_prefix = leaf.prefix
+ container: LN = leaf
+ while container:
+ parent = container.parent
+ if parent is None:
+ break
+
+ if parent.children[0].prefix != same_prefix:
+ break
+
+ if parent.type == syms.file_input:
+ break
+
+ if parent.prev_sibling is not None and parent.prev_sibling.type in BRACKETS:
+ break
+
+ container = parent
+ return container
+
+
+def first_leaf_column(node: Node) -> Optional[int]:
+ """Returns the column of the first leaf child of a node."""
+ for child in node.children:
+ if isinstance(child, Leaf):
+ return child.column
+ return None
+
+
+def first_child_is_arith(node: Node) -> bool:
+ """Whether first child is an arithmetic or a binary arithmetic expression"""
+ expr_types = {
+ syms.arith_expr,
+ syms.shift_expr,
+ syms.xor_expr,
+ syms.and_expr,
+ }
+ return bool(node.children and node.children[0].type in expr_types)
+
+
+def is_docstring(leaf: Leaf) -> bool:
+ if prev_siblings_are(
+ leaf.parent, [None, token.NEWLINE, token.INDENT, syms.simple_stmt]
+ ):
+ return True
+
+ # Multiline docstring on the same line as the `def`.
+ if prev_siblings_are(leaf.parent, [syms.parameters, token.COLON, syms.simple_stmt]):
+ # `syms.parameters` is only used in funcdefs and async_funcdefs in the Python
+ # grammar. We're safe to return True without further checks.
+ return True
+
+ return False
+
+
+def is_empty_tuple(node: LN) -> bool:
+ """Return True if `node` holds an empty tuple."""
+ return (
+ node.type == syms.atom
+ and len(node.children) == 2
+ and node.children[0].type == token.LPAR
+ and node.children[1].type == token.RPAR
+ )
+
+
+def is_one_tuple(node: LN) -> bool:
+ """Return True if `node` holds a tuple with one element, with or without parens."""
+ if node.type == syms.atom:
+ gexp = unwrap_singleton_parenthesis(node)
+ if gexp is None or gexp.type != syms.testlist_gexp:
+ return False
+
+ return len(gexp.children) == 2 and gexp.children[1].type == token.COMMA
+
+ return (
+ node.type in IMPLICIT_TUPLE
+ and len(node.children) == 2
+ and node.children[1].type == token.COMMA
+ )
+
+
+def is_one_tuple_between(opening: Leaf, closing: Leaf, leaves: List[Leaf]) -> bool:
+ """Return True if content between `opening` and `closing` looks like a one-tuple."""
+ if opening.type != token.LPAR and closing.type != token.RPAR:
+ return False
+
+ depth = closing.bracket_depth + 1
+ for _opening_index, leaf in enumerate(leaves):
+ if leaf is opening:
+ break
+
+ else:
+ raise LookupError("Opening paren not found in `leaves`")
+
+ commas = 0
+ _opening_index += 1
+ for leaf in leaves[_opening_index:]:
+ if leaf is closing:
+ break
+
+ bracket_depth = leaf.bracket_depth
+ if bracket_depth == depth and leaf.type == token.COMMA:
+ commas += 1
+ if leaf.parent and leaf.parent.type in {
+ syms.arglist,
+ syms.typedargslist,
+ }:
+ commas += 1
+ break
+
+ return commas < 2
+
+
+def is_walrus_assignment(node: LN) -> bool:
+ """Return True iff `node` is of the shape ( test := test )"""
+ inner = unwrap_singleton_parenthesis(node)
+ return inner is not None and inner.type == syms.namedexpr_test
+
+
+def is_simple_decorator_trailer(node: LN, last: bool = False) -> bool:
+ """Return True iff `node` is a trailer valid in a simple decorator"""
+ return node.type == syms.trailer and (
+ (
+ len(node.children) == 2
+ and node.children[0].type == token.DOT
+ and node.children[1].type == token.NAME
+ )
+ # last trailer can be an argument-less parentheses pair
+ or (
+ last
+ and len(node.children) == 2
+ and node.children[0].type == token.LPAR
+ and node.children[1].type == token.RPAR
+ )
+ # last trailer can be arguments
+ or (
+ last
+ and len(node.children) == 3
+ and node.children[0].type == token.LPAR
+ # and node.children[1].type == syms.argument
+ and node.children[2].type == token.RPAR
+ )
+ )
+
+
+def is_simple_decorator_expression(node: LN) -> bool:
+ """Return True iff `node` could be a 'dotted name' decorator
+
+ This function takes the node of the 'namedexpr_test' of the new decorator
+ grammar and test if it would be valid under the old decorator grammar.
+
+ The old grammar was: decorator: @ dotted_name [arguments] NEWLINE
+ The new grammar is : decorator: @ namedexpr_test NEWLINE
+ """
+ if node.type == token.NAME:
+ return True
+ if node.type == syms.power:
+ if node.children:
+ return (
+ node.children[0].type == token.NAME
+ and all(map(is_simple_decorator_trailer, node.children[1:-1]))
+ and (
+ len(node.children) < 2
+ or is_simple_decorator_trailer(node.children[-1], last=True)
+ )
+ )
+ return False
+
+
+def is_yield(node: LN) -> bool:
+ """Return True if `node` holds a `yield` or `yield from` expression."""
+ if node.type == syms.yield_expr:
+ return True
+
+ if node.type == token.NAME and node.value == "yield": # type: ignore
+ return True
+
+ if node.type != syms.atom:
+ return False
+
+ if len(node.children) != 3:
+ return False
+
+ lpar, expr, rpar = node.children
+ if lpar.type == token.LPAR and rpar.type == token.RPAR:
+ return is_yield(expr)
+
+ return False
+
+
+def is_vararg(leaf: Leaf, within: Set[NodeType]) -> bool:
+ """Return True if `leaf` is a star or double star in a vararg or kwarg.
+
+ If `within` includes VARARGS_PARENTS, this applies to function signatures.
+ If `within` includes UNPACKING_PARENTS, it applies to right hand-side
+ extended iterable unpacking (PEP 3132) and additional unpacking
+ generalizations (PEP 448).
+ """
+ if leaf.type not in VARARGS_SPECIALS or not leaf.parent:
+ return False
+
+ p = leaf.parent
+ if p.type == syms.star_expr:
+ # Star expressions are also used as assignment targets in extended
+ # iterable unpacking (PEP 3132). See what its parent is instead.
+ if not p.parent:
+ return False
+
+ p = p.parent
+
+ return p.type in within
+
+
+def is_multiline_string(leaf: Leaf) -> bool:
+ """Return True if `leaf` is a multiline string that actually spans many lines."""
+ return has_triple_quotes(leaf.value) and "\n" in leaf.value
+
+
+def is_stub_suite(node: Node) -> bool:
+ """Return True if `node` is a suite with a stub body."""
+ if (
+ len(node.children) != 4
+ or node.children[0].type != token.NEWLINE
+ or node.children[1].type != token.INDENT
+ or node.children[3].type != token.DEDENT
+ ):
+ return False
+
+ return is_stub_body(node.children[2])
+
+
+def is_stub_body(node: LN) -> bool:
+ """Return True if `node` is a simple statement containing an ellipsis."""
+ if not isinstance(node, Node) or node.type != syms.simple_stmt:
+ return False
+
+ if len(node.children) != 2:
+ return False
+
+ child = node.children[0]
+ return (
+ child.type == syms.atom
+ and len(child.children) == 3
+ and all(leaf == Leaf(token.DOT, ".") for leaf in child.children)
+ )
+
+
+def is_atom_with_invisible_parens(node: LN) -> bool:
+ """Given a `LN`, determines whether it's an atom `node` with invisible
+ parens. Useful in dedupe-ing and normalizing parens.
+ """
+ if isinstance(node, Leaf) or node.type != syms.atom:
+ return False
+
+ first, last = node.children[0], node.children[-1]
+ return (
+ isinstance(first, Leaf)
+ and first.type == token.LPAR
+ and first.value == ""
+ and isinstance(last, Leaf)
+ and last.type == token.RPAR
+ and last.value == ""
+ )
+
+
+def is_empty_par(leaf: Leaf) -> bool:
+ return is_empty_lpar(leaf) or is_empty_rpar(leaf)
+
+
+def is_empty_lpar(leaf: Leaf) -> bool:
+ return leaf.type == token.LPAR and leaf.value == ""
+
+
+def is_empty_rpar(leaf: Leaf) -> bool:
+ return leaf.type == token.RPAR and leaf.value == ""
+
+
+def is_import(leaf: Leaf) -> bool:
+ """Return True if the given leaf starts an import statement."""
+ p = leaf.parent
+ t = leaf.type
+ v = leaf.value
+ return bool(
+ t == token.NAME
+ and (
+ (v == "import" and p and p.type == syms.import_name)
+ or (v == "from" and p and p.type == syms.import_from)
+ )
+ )
+
+
+def is_type_comment(leaf: Leaf, suffix: str = "") -> bool:
+ """Return True if the given leaf is a special comment.
+ Only returns true for type comments for now."""
+ t = leaf.type
+ v = leaf.value
+ return t in {token.COMMENT, STANDALONE_COMMENT} and v.startswith("# type:" + suffix)
+
+
+def wrap_in_parentheses(parent: Node, child: LN, *, visible: bool = True) -> None:
+ """Wrap `child` in parentheses.
+
+ This replaces `child` with an atom holding the parentheses and the old
+ child. That requires moving the prefix.
+
+ If `visible` is False, the leaves will be valueless (and thus invisible).
+ """
+ lpar = Leaf(token.LPAR, "(" if visible else "")
+ rpar = Leaf(token.RPAR, ")" if visible else "")
+ prefix = child.prefix
+ child.prefix = ""
+ index = child.remove() or 0
+ new_child = Node(syms.atom, [lpar, child, rpar])
+ new_child.prefix = prefix
+ parent.insert_child(index, new_child)
+
+
+def unwrap_singleton_parenthesis(node: LN) -> Optional[LN]:
+ """Returns `wrapped` if `node` is of the shape ( wrapped ).
+
+ Parenthesis can be optional. Returns None otherwise"""
+ if len(node.children) != 3:
+ return None
+
+ lpar, wrapped, rpar = node.children
+ if not (lpar.type == token.LPAR and rpar.type == token.RPAR):
+ return None
+
+ return wrapped
+
+
+def ensure_visible(leaf: Leaf) -> None:
+ """Make sure parentheses are visible.
+
+ They could be invisible as part of some statements (see
+ :func:`normalize_invisible_parens` and :func:`visit_import_from`).
+ """
+ if leaf.type == token.LPAR:
+ leaf.value = "("
+ elif leaf.type == token.RPAR:
+ leaf.value = ")"
projects / etc / vim.git / blobdiff