def finish_tree(self, tree, filename):
if self.found_future_import:
return
if not isinstance(tree, pytree.Node):
# Empty files (usually __init__.py) show up as a single Leaf
# instead of a Node, so leave them alone
return
first_stmt = tree.children[0]
if is_docstring(first_stmt):
# Skip a line and add the import after the docstring
tree.insert_child(1, Newline())
pos = 2
elif first_stmt.prefix:
# No docstring, but an initial comment (perhaps a #! line).
# Transfer the initial comment to a new blank line.
newline = Newline()
newline.prefix = first_stmt.prefix
first_stmt.prefix = ""
tree.insert_child(0, newline)
pos = 1
else:
# No comments or docstring, just insert at the start
pos = 0
tree.insert_child(pos, self.new_future_import(None))
tree.insert_child(pos+1, Newline()) # terminates the import stmt
def finish_tree(self, tree, filename):
if self.found_future_import:
return
if not isinstance(tree, pytree.Node):
# Empty files (usually __init__.py) show up as a single Leaf
# instead of a Node, so leave them alone
return
first_stmt = tree.children[0]
if is_docstring(first_stmt):
# Skip a line and add the import after the docstring
tree.insert_child(1, Newline())
pos = 2
elif first_stmt.prefix:
# No docstring, but an initial comment (perhaps a #! line).
# Transfer the initial comment to a new blank line.
newline = Newline()
newline.prefix = first_stmt.prefix
first_stmt.prefix = ""
tree.insert_child(0, newline)
pos = 1
else:
# No comments or docstring, just insert at the start
pos = 0
tree.insert_child(pos, self.new_future_import(None))
tree.insert_child(pos + 1, Newline()) # terminates the import stmt
def _CreateCode(indent, package, symbols, comment):
"""
Create code:
from <package> import <symbols> # <comment>
"""
# children: the children nodes for the final from-import statement
children = [
Name('from', prefix=' ' * indent),
Name(package, prefix=' '),
Name('import', prefix=' '),
]
# name_leaf: list of leaf nodes with the symbols to import
name_leafs = []
symbols = sorted(symbols)
for i, i_symbol in enumerate(symbols):
prefix = ' ' if i == 0 else ', '
name_leafs.append(i_symbol.CreateNameNode(prefix))
# nodes_wrap: if true, we need to wrap the import statement
nodes_wrap = False
line_len = 0
line_len += six.moves.reduce(lambda x, y: x + y,
map(len, map(str, children)), 0)
line_len += six.moves.reduce(lambda x, y: x + y,
map(len, map(str, name_leafs)), 0)
if line_len > page_width:
# Add parenthesis around the "from" names
name_leafs[0].prefix = ''
name_leafs.insert(0, Name('(', prefix=' '))
name_leafs.append(Name(')'))
nodes_wrap = True
# Adds the name_leafs to the children list
children += [
Node(pygram.python_symbols.import_as_names, name_leafs)
]
# from_import: the final node for the import statement
from_import = Node(pygram.python_symbols.import_from, children)
# result: a simple-statement node with the import statement and
# EOL.
new_line = Newline()
new_line.prefix = comment
result = Node(
pygram.python_symbols.simple_stmt,
children=[
from_import,
new_line,
],
)
# Wrap nodes if necessary (see nodes_wrap above)
if nodes_wrap:
ImportBlock.TextWrapForNode(result, page_width, indent)
return result
def _CreateCode(indent, package, symbols, comment):
'''
Create code:
from <package> import <symbols> # <comment>
'''
# children: the children nodes for the final from-import statement
children = [
Name('from', prefix=' ' * indent),
Name(package, prefix=' '),
Name('import', prefix=' '),
]
# name_leaf: list of leaf nodes with the symbols to import
name_leafs = []
symbols = sorted(symbols)
for i, i_symbol in enumerate(symbols):
prefix = ' ' if i == 0 else ', '
name_leafs.append(i_symbol.CreateNameNode(prefix))
# nodes_wrap: if true, we need to wrap the import statement
nodes_wrap = False
line_len = 0
line_len += reduce(lambda x, y:x + y, map(len, map(str, children)), 0)
line_len += reduce(lambda x, y:x + y, map(len, map(str, name_leafs)), 0)
if line_len > page_width:
# Add parenthesis around the "from" names
name_leafs[0].prefix = ''
name_leafs.insert(0, Name('(', prefix=' '))
name_leafs.append(Name(')'))
nodes_wrap = True
# Adds the name_leafs to the children list
children += [Node(pygram.python_symbols.import_as_names, name_leafs)]
# from_import: the final node for the import statement
from_import = Node(pygram.python_symbols.import_from, children)
# result: a simple-statement node with the import statement and EOL.
new_line = Newline()
new_line.prefix = comment
result = Node(
pygram.python_symbols.simple_stmt,
children=[
from_import,
new_line,
],
)
# Wrap nodes if necessary (see nodes_wrap above)
if nodes_wrap:
ImportBlock.TextWrapForNode(result, page_width, indent)
return result
def CreateCode(self, indent, page_width):
from lib2to3 import pygram
from lib2to3.fixer_util import Name, Newline
from lib2to3.pytree import Node
assert self.kind == self.KIND_IMPORT_NAME
name_node = self.CreateNameNode()
new_line = Newline()
new_line.prefix = self.comment
result = Node(pygram.python_symbols.simple_stmt,
prefix=' ' * indent,
children=[Name('import'), name_node, new_line])
return [result]
def CreateCode(self, indent, page_width):
from lib2to3 import pygram
from lib2to3.fixer_util import Name, Newline
from lib2to3.pytree import Node
assert self.kind == self.KIND_IMPORT_NAME
name_node = self.CreateNameNode()
new_line = Newline()
new_line.prefix = self.comment
result = Node(
pygram.python_symbols.simple_stmt,
prefix=' ' * indent,
children=[Name('import'), name_node, new_line]
)
return [result]
def add_future_import(tree, name):
"""Add future import.
From: https://github.com/facebook/tornado
Copyright 2009 Facebook
Licensed under the Apache License, Version 2.0 (the "License"); you may
not use this file except in compliance with the License. You may obtain
a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
License for the specific language governing permissions and limitations
under the License.
"""
if not isinstance(tree, Node):
# Empty files (usually __init__.py) show up as a single Leaf
# instead of a Node, so leave them alone
return
first_stmt = tree.children[0]
if is_docstring(first_stmt):
# Skip a line and add the import after the docstring
tree.insert_child(1, Newline())
pos = 2
elif first_stmt.prefix:
# No docstring, but an initial comment (perhaps a #! line).
# Transfer the initial comment to a new blank line.
newline = Newline()
newline.prefix = first_stmt.prefix
first_stmt.prefix = ''
tree.insert_child(0, newline)
pos = 1
else:
# No comments or docstring, just insert at the start
pos = 0
tree.insert_child(
pos,
FromImport('__future__', [Name(name, prefix=' ')]))
tree.insert_child(pos + 1, Newline()) # terminates the import stmt
