X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/87b8df28c48353d3d08d7e88d178c7a567de816a..c891c65b6b2de7c257244cc409276b485130c275:/black.py

diff --git a/black.py b/black.py
index 228deb7..46c64a3 100644
--- a/black.py
+++ b/black.py
@@ -44,11 +44,12 @@ from blib2to3.pgen2 import driver, token
 from blib2to3.pgen2.parse import ParseError
 
 
-__version__ = "18.4a6"
+__version__ = "18.5b0"
 DEFAULT_LINE_LENGTH = 88
+CACHE_DIR = Path(user_cache_dir("black", version=__version__))
+
 
 # types
-syms = pygram.python_symbols
 FileContent = str
 Encoding = str
 Depth = int
@@ -65,6 +66,9 @@ Cache = Dict[Path, CacheInfo]
 out = partial(click.secho, bold=True, err=True)
 err = partial(click.secho, fg="red", err=True)
 
+pygram.initialize(CACHE_DIR)
+syms = pygram.python_symbols
+
 
 class NothingChanged(UserWarning):
     """Raised by :func:`format_file` when reformatted code is the same as source."""
@@ -2532,13 +2536,21 @@ def ensure_visible(leaf: Leaf) -> None:
 
 def should_explode(line: Line, opening_bracket: Leaf) -> bool:
     """Should `line` immediately be split with `delimiter_split()` after RHS?"""
-    return bool(
+    if not (
         opening_bracket.parent
         and opening_bracket.parent.type in {syms.atom, syms.import_from}
         and opening_bracket.value in "[{("
-        and line.bracket_tracker.delimiters
-        and line.bracket_tracker.max_delimiter_priority() == COMMA_PRIORITY
-    )
+    ):
+        return False
+
+    try:
+        last_leaf = line.leaves[-1]
+        exclude = {id(last_leaf)} if last_leaf.type == token.COMMA else set()
+        max_priority = line.bracket_tracker.max_delimiter_priority(exclude=exclude)
+    except (IndexError, ValueError):
+        return False
+
+    return max_priority == COMMA_PRIORITY
 
 
 def is_python36(node: Node) -> bool:
@@ -3043,9 +3055,6 @@ def can_omit_invisible_parens(line: Line, line_length: int) -> bool:
     return False
 
 
-CACHE_DIR = Path(user_cache_dir("black", version=__version__))
-
-
 def get_cache_file(line_length: int) -> Path:
     return CACHE_DIR / f"cache.{line_length}.pickle"