# Python 2.7
pygram.python_grammar,
]
- elif all(version.is_python2() for version in target_versions):
+
+ if all(version.is_python2() for version in target_versions):
# Python 2-only code, so try Python 2 grammars.
return [
# Python 2.7 with future print_function import
# Python 2.7
pygram.python_grammar,
]
- else:
- # Python 3-compatible code, so only try Python 3 grammar.
- grammars = []
- # If we have to parse both, try to parse async as a keyword first
- if not supports_feature(target_versions, Feature.ASYNC_IDENTIFIERS):
- # Python 3.7+
- grammars.append(
- pygram.python_grammar_no_print_statement_no_exec_statement_async_keywords # noqa: B950
- )
- if not supports_feature(target_versions, Feature.ASYNC_KEYWORDS):
- # Python 3.0-3.6
- grammars.append(pygram.python_grammar_no_print_statement_no_exec_statement)
- # At least one of the above branches must have been taken, because every Python
- # version has exactly one of the two 'ASYNC_*' flags
- return grammars
+
+ # Python 3-compatible code, so only try Python 3 grammar.
+ grammars = []
+ # If we have to parse both, try to parse async as a keyword first
+ if not supports_feature(target_versions, Feature.ASYNC_IDENTIFIERS):
+ # Python 3.7+
+ grammars.append(
+ pygram.python_grammar_no_print_statement_no_exec_statement_async_keywords
+ )
+ if not supports_feature(target_versions, Feature.ASYNC_KEYWORDS):
+ # Python 3.0-3.6
+ grammars.append(pygram.python_grammar_no_print_statement_no_exec_statement)
+ # At least one of the above branches must have been taken, because every Python
+ # version has exactly one of the two 'ASYNC_*' flags
+ return grammars
def lib2to3_parse(src_txt: str, target_versions: Iterable[TargetVersion] = ()) -> Node:
"""
if not self.leaves or len(self.leaves) < 4:
return False
+
# Look for and address a trailing colon.
if self.leaves[-1].type == token.COLON:
closer = self.leaves[-2]
close_index = -1
if closer.type not in CLOSING_BRACKETS or self.inside_brackets:
return False
+
if closer.type == token.RPAR:
# Tuples require an extra check, because if there's only
# one element in the tuple removing the comma unmakes the
for _open_index, leaf in enumerate(self.leaves):
if leaf is opener:
break
+
else:
# Couldn't find the matching opening paren, play it safe.
return False
+
commas = 0
comma_depth = self.leaves[close_index - 1].bracket_depth
for leaf in self.leaves[_open_index + 1 : close_index]:
# We haven't looked yet for the trailing comma because
# we might also have caught noop parens.
return self.leaves[close_index - 1].type == token.COMMA
+
elif commas == 1:
return False # it's either a one-tuple or didn't have a trailing comma
+
if self.leaves[close_index - 1].type in CLOSING_BRACKETS:
close_index -= 1
closer = self.leaves[close_index]
if closer.type == token.RPAR:
# TODO: this is a gut feeling. Will we ever see this?
return False
+
if self.leaves[close_index - 1].type != token.COMMA:
return False
+
return True
@property
def contains_standalone_comments(self, depth_limit: int = sys.maxsize) -> bool:
"""If so, needs to be split before emitting."""
for leaf in self.leaves:
- if leaf.type == STANDALONE_COMMENT:
- if leaf.bracket_depth <= depth_limit:
- return True
+ if leaf.type == STANDALONE_COMMENT and leaf.bracket_depth <= depth_limit:
+ return True
+
return False
def contains_uncollapsable_type_comments(self) -> bool:
"""Remove trailing comma if there is one and it's safe."""
if not (self.leaves and self.leaves[-1].type == token.COMMA):
return False
+
# We remove trailing commas only in the case of importing a
# single name from a module.
if not (
comment.type = STANDALONE_COMMENT
comment.prefix = ""
return False
+
last_leaf = self.leaves[-2]
self.comments.setdefault(id(last_leaf), []).append(comment)
return True
# All splits failed, best effort split with no omits.
# This mostly happens to multiline strings that are by definition
# reported as not fitting a single line.
- # line_length=1 is silly, but somehow produces better formatting
- # than other things we've tried so far. See #762 and #781.
+ # line_length=1 here was historically a bug that somehow became a feature.
+ # See #762 and #781 for the full story.
yield from right_hand_split(line, line_length=1, features=features)
if line.inside_brackets:
for i in range(len(leaves) - 1, -1, -1):
if leaves[i].type == STANDALONE_COMMENT:
continue
- elif leaves[i].type == token.COMMA:
- break
- else:
+
+ if leaves[i].type != token.COMMA:
leaves.insert(i + 1, Leaf(token.COMMA, ","))
- break
+ break
+
# Populate the line
for leaf in leaves:
result.append(leaf, preformatted=True)
if "\\" in str(m):
# Do not introduce backslashes in interpolated expressions
return
+
if new_quote == '"""' and new_body[-1:] == '"':
# edge case:
new_body = new_body[:-1] + '\\"'
if check_lpar:
if is_walrus_assignment(child):
continue
+
if child.type == syms.atom:
# Determines if the underlying atom should be surrounded with
# invisible params - also makes parens invisible recursively
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
if isinstance(child, Leaf):
if child.type == token.NAME:
yield child.value
+
elif child.type == syms.import_as_name:
orig_name = child.children[0]
assert isinstance(orig_name, Leaf), "Invalid syntax parsing imports"
assert orig_name.type == token.NAME, "Invalid syntax parsing imports"
yield orig_name.value
+
elif child.type == syms.import_as_names:
yield from get_imports_from_children(child.children)
+
else:
raise AssertionError("Invalid syntax parsing imports")
for child in node.children:
if child.type != syms.simple_stmt:
break
+
first_child = child.children[0]
if isinstance(first_child, Leaf):
# Continue looking if we see a docstring; otherwise stop.
and child.children[1].type == token.NEWLINE
):
continue
- else:
- break
+
+ break
+
elif first_child.type == syms.import_from:
module_name = first_child.children[1]
if not isinstance(module_name, Leaf) or module_name.value != "__future__":
break
+
imports |= set(get_imports_from_children(first_child.children[3:]))
else:
break
+
return imports
def get_gitignore(root: Path) -> PathSpec:
""" Return a PathSpec matching gitignore content if present."""
gitignore = root / ".gitignore"
- if not gitignore.is_file():
- return PathSpec.from_lines("gitwildmatch", [])
- else:
- return PathSpec.from_lines("gitwildmatch", gitignore.open())
+ lines: List[str] = []
+ if gitignore.is_file():
+ with gitignore.open() as gf:
+ lines = gf.readlines()
+ return PathSpec.from_lines("gitwildmatch", lines)
def gen_python_files_in_dir(
except OSError as e:
report.path_ignored(child, f"cannot be read because {e}")
continue
+
except ValueError:
if child.is_symlink():
report.path_ignored(
node: Union[ast.AST, ast3.AST, ast27.AST]
) -> Union[ast.AST, ast3.AST, ast27.AST]:
"""Map ast nodes deprecated in 3.8 to Constant."""
- # casts are required until this is released:
- # https://github.com/python/typeshed/pull/3142
if isinstance(node, (ast.Str, ast3.Str, ast27.Str, ast.Bytes, ast3.Bytes)):
- return cast(ast.AST, ast.Constant(value=node.s))
- elif isinstance(node, (ast.Num, ast3.Num, ast27.Num)):
- return cast(ast.AST, ast.Constant(value=node.n))
- elif isinstance(node, (ast.NameConstant, ast3.NameConstant)):
- return cast(ast.AST, ast.Constant(value=node.value))
+ return ast.Constant(value=node.s)
+
+ if isinstance(node, (ast.Num, ast3.Num, ast27.Num)):
+ return ast.Constant(value=node.n)
+
+ if isinstance(node, (ast.NameConstant, ast3.NameConstant)):
+ return ast.Constant(value=node.value)
+
return node
):
for item in item.elts:
yield from _v(item, depth + 2)
+
elif isinstance(item, (ast.AST, ast3.AST, ast27.AST)):
yield from _v(item, depth + 2)
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