| | """ |
| | Convert use of sys.exitfunc to use the atexit module. |
| | """ |
| |
|
| | |
| |
|
| | from lib2to3 import pytree, fixer_base |
| | from lib2to3.fixer_util import Name, Attr, Call, Comma, Newline, syms |
| |
|
| |
|
| | class FixExitfunc(fixer_base.BaseFix): |
| | keep_line_order = True |
| | BM_compatible = True |
| |
|
| | PATTERN = """ |
| | ( |
| | sys_import=import_name<'import' |
| | ('sys' |
| | | |
| | dotted_as_names< (any ',')* 'sys' (',' any)* > |
| | ) |
| | > |
| | | |
| | expr_stmt< |
| | power< 'sys' trailer< '.' 'exitfunc' > > |
| | '=' func=any > |
| | ) |
| | """ |
| |
|
| | def __init__(self, *args): |
| | super(FixExitfunc, self).__init__(*args) |
| |
|
| | def start_tree(self, tree, filename): |
| | super(FixExitfunc, self).start_tree(tree, filename) |
| | self.sys_import = None |
| |
|
| | def transform(self, node, results): |
| | |
| | if "sys_import" in results: |
| | if self.sys_import is None: |
| | self.sys_import = results["sys_import"] |
| | return |
| |
|
| | func = results["func"].clone() |
| | func.prefix = "" |
| | register = pytree.Node(syms.power, |
| | Attr(Name("atexit"), Name("register")) |
| | ) |
| | call = Call(register, [func], node.prefix) |
| | node.replace(call) |
| |
|
| | if self.sys_import is None: |
| | |
| | self.warning(node, "Can't find sys import; Please add an atexit " |
| | "import at the top of your file.") |
| | return |
| |
|
| | |
| | names = self.sys_import.children[1] |
| | if names.type == syms.dotted_as_names: |
| | names.append_child(Comma()) |
| | names.append_child(Name("atexit", " ")) |
| | else: |
| | containing_stmt = self.sys_import.parent |
| | position = containing_stmt.children.index(self.sys_import) |
| | stmt_container = containing_stmt.parent |
| | new_import = pytree.Node(syms.import_name, |
| | [Name("import"), Name("atexit", " ")] |
| | ) |
| | new = pytree.Node(syms.simple_stmt, [new_import]) |
| | containing_stmt.insert_child(position + 1, Newline()) |
| | containing_stmt.insert_child(position + 2, new) |
| |
|
