Python ast.Pass() Examples

The following are 30 code examples of ast.Pass(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module ast , or try the search function .
Example #1
Source File: topython.py    From pyrser with GNU General Public License v3.0 6 votes vote down vote up 
def __exit_scope(self) -> ast.stmt:
        """Create the appropriate scope exiting statement.

        The documentation only shows one level and always uses
        'return False' in examples.

        'raise AltFalse()' within a try.
        'break' within a loop.
        'return False' otherwise.
        """
        if self.in_optional:
            return ast.Pass()
        if self.in_try:
            return ast.Raise(
                ast.Call(ast.Name('AltFalse', ast.Load()), [], [], None, None),
                None)
        if self.in_loop:
            return ast.Break()
        return ast.Return(ast.Name('False', ast.Load()))

    #TODO(bps): find a better name to describe what this does
Example #2
Source File: topython.py    From pyrser with GNU General Public License v3.0 6 votes vote down vote up 
def visit_Rep0N(self, node: parsing.Rep0N) -> [ast.stmt]:
        """Generates python code for a clause repeated 0 or more times.

        #If all clauses can be inlined
        while clause:
            pass

        while True:
            <code for the clause>
        """
        cl_ast = self.visit(node.pt)
        if isinstance(cl_ast, ast.expr):
            return [ast.While(cl_ast, [ast.Pass()], [])]
        self.in_loop += 1
        clause = self._clause(self.visit(node.pt))
        self.in_loop -= 1
        return [ast.While(ast.Name('True', ast.Load()), clause, [])]
Example #3
Source File: test_ast.py    From ironpython3 with Apache License 2.0 6 votes vote down vote up 
def test_try(self):
        p = ast.Pass()
        t = ast.Try([], [], [], [p])
        self.stmt(t, "empty body on Try")
        t = ast.Try([ast.Expr(ast.Name("x", ast.Store()))], [], [], [p])
        self.stmt(t, "must have Load context")
        t = ast.Try([p], [], [], [])
        self.stmt(t, "Try has neither except handlers nor finalbody")
        t = ast.Try([p], [], [p], [p])
        self.stmt(t, "Try has orelse but no except handlers")
        t = ast.Try([p], [ast.ExceptHandler(None, "x", [])], [], [])
        self.stmt(t, "empty body on ExceptHandler")
        e = [ast.ExceptHandler(ast.Name("x", ast.Store()), "y", [p])]
        self.stmt(ast.Try([p], e, [], []), "must have Load context")
        e = [ast.ExceptHandler(None, "x", [p])]
        t = ast.Try([p], e, [ast.Expr(ast.Name("x", ast.Store()))], [p])
        self.stmt(t, "must have Load context")
        t = ast.Try([p], e, [p], [ast.Expr(ast.Name("x", ast.Store()))])
        self.stmt(t, "must have Load context")
Example #4
Source File: test_ast.py    From Project-New-Reign---Nemesis-Main with GNU General Public License v3.0 6 votes vote down vote up 
def test_classdef(self):
        def cls(bases=None, keywords=None, body=None, decorator_list=None):
            if bases is None:
                bases = []
            if keywords is None:
                keywords = []
            if body is None:
                body = [ast.Pass()]
            if decorator_list is None:
                decorator_list = []
            return ast.ClassDef("myclass", bases, keywords,
                                body, decorator_list)
        self.stmt(cls(bases=[ast.Name("x", ast.Store())]),
                  "must have Load context")
        self.stmt(cls(keywords=[ast.keyword("x", ast.Name("x", ast.Store()))]),
                  "must have Load context")
        self.stmt(cls(body=[]), "empty body on ClassDef")
        self.stmt(cls(body=[None]), "None disallowed")
        self.stmt(cls(decorator_list=[ast.Name("x", ast.Store())]),
                  "must have Load context")
Example #5
Source File: onelinerizer.py    From onelinerizer with MIT License 6 votes vote down vote up 
def onelinerize(original):
    # original :: string
    # :: string
    t = ast.parse(original)
    table = symtable.symtable(original, '<string>', 'exec')

    original = original.strip()

    # If there's only one line anyways, be lazy
    if len(original.splitlines()) == 1 and \
       len(t.body) == 1 and \
       type(t.body[0]) in (ast.Delete, ast.Assign, ast.AugAssign, ast.Print,
                           ast.Raise, ast.Assert, ast.Import, ast.ImportFrom,
                           ast.Exec, ast.Global, ast.Expr, ast.Pass):
        return original

    return get_init_code(t, table)
Example #6
Source File: test_ast.py    From Fluid-Designer with GNU General Public License v3.0 6 votes vote down vote up 
def test_classdef(self):
        def cls(bases=None, keywords=None, body=None, decorator_list=None):
            if bases is None:
                bases = []
            if keywords is None:
                keywords = []
            if body is None:
                body = [ast.Pass()]
            if decorator_list is None:
                decorator_list = []
            return ast.ClassDef("myclass", bases, keywords,
                                body, decorator_list)
        self.stmt(cls(bases=[ast.Name("x", ast.Store())]),
                  "must have Load context")
        self.stmt(cls(keywords=[ast.keyword("x", ast.Name("x", ast.Store()))]),
                  "must have Load context")
        self.stmt(cls(body=[]), "empty body on ClassDef")
        self.stmt(cls(body=[None]), "None disallowed")
        self.stmt(cls(decorator_list=[ast.Name("x", ast.Store())]),
                  "must have Load context")
Example #7
Source File: test_ast.py    From ironpython3 with Apache License 2.0 6 votes vote down vote up 
def test_classdef(self):
        def cls(bases=None, keywords=None, starargs=None, kwargs=None,
                body=None, decorator_list=None):
            if bases is None:
                bases = []
            if keywords is None:
                keywords = []
            if body is None:
                body = [ast.Pass()]
            if decorator_list is None:
                decorator_list = []
            return ast.ClassDef("myclass", bases, keywords, starargs,
                                kwargs, body, decorator_list)
        self.stmt(cls(bases=[ast.Name("x", ast.Store())]),
                  "must have Load context")
        self.stmt(cls(keywords=[ast.keyword("x", ast.Name("x", ast.Store()))]),
                  "must have Load context")
        self.stmt(cls(starargs=ast.Name("x", ast.Store())),
                  "must have Load context")
        self.stmt(cls(kwargs=ast.Name("x", ast.Store())),
                  "must have Load context")
        self.stmt(cls(body=[]), "empty body on ClassDef")
        self.stmt(cls(body=[None]), "None disallowed")
        self.stmt(cls(decorator_list=[ast.Name("x", ast.Store())]),
                  "must have Load context")
Example #8
Source File: test_ast.py    From Fluid-Designer with GNU General Public License v3.0 6 votes vote down vote up 
def test_try(self):
        p = ast.Pass()
        t = ast.Try([], [], [], [p])
        self.stmt(t, "empty body on Try")
        t = ast.Try([ast.Expr(ast.Name("x", ast.Store()))], [], [], [p])
        self.stmt(t, "must have Load context")
        t = ast.Try([p], [], [], [])
        self.stmt(t, "Try has neither except handlers nor finalbody")
        t = ast.Try([p], [], [p], [p])
        self.stmt(t, "Try has orelse but no except handlers")
        t = ast.Try([p], [ast.ExceptHandler(None, "x", [])], [], [])
        self.stmt(t, "empty body on ExceptHandler")
        e = [ast.ExceptHandler(ast.Name("x", ast.Store()), "y", [p])]
        self.stmt(ast.Try([p], e, [], []), "must have Load context")
        e = [ast.ExceptHandler(None, "x", [p])]
        t = ast.Try([p], e, [ast.Expr(ast.Name("x", ast.Store()))], [p])
        self.stmt(t, "must have Load context")
        t = ast.Try([p], e, [p], [ast.Expr(ast.Name("x", ast.Store()))])
        self.stmt(t, "must have Load context")
Example #9
Source File: test_ast.py    From Project-New-Reign---Nemesis-Main with GNU General Public License v3.0 6 votes vote down vote up 
def test_try(self):
        p = ast.Pass()
        t = ast.Try([], [], [], [p])
        self.stmt(t, "empty body on Try")
        t = ast.Try([ast.Expr(ast.Name("x", ast.Store()))], [], [], [p])
        self.stmt(t, "must have Load context")
        t = ast.Try([p], [], [], [])
        self.stmt(t, "Try has neither except handlers nor finalbody")
        t = ast.Try([p], [], [p], [p])
        self.stmt(t, "Try has orelse but no except handlers")
        t = ast.Try([p], [ast.ExceptHandler(None, "x", [])], [], [])
        self.stmt(t, "empty body on ExceptHandler")
        e = [ast.ExceptHandler(ast.Name("x", ast.Store()), "y", [p])]
        self.stmt(ast.Try([p], e, [], []), "must have Load context")
        e = [ast.ExceptHandler(None, "x", [p])]
        t = ast.Try([p], e, [ast.Expr(ast.Name("x", ast.Store()))], [p])
        self.stmt(t, "must have Load context")
        t = ast.Try([p], e, [p], [ast.Expr(ast.Name("x", ast.Store()))])
        self.stmt(t, "must have Load context")
Example #10
Source File: test_ast.py    From Project-New-Reign---Nemesis-Main with GNU General Public License v3.0 5 votes vote down vote up 
def test_funcdef(self):
        a = ast.arguments([], None, [], [], None, [])
        f = ast.FunctionDef("x", a, [], [], None)
        self.stmt(f, "empty body on FunctionDef")
        f = ast.FunctionDef("x", a, [ast.Pass()], [ast.Name("x", ast.Store())],
                            None)
        self.stmt(f, "must have Load context")
        f = ast.FunctionDef("x", a, [ast.Pass()], [],
                            ast.Name("x", ast.Store()))
        self.stmt(f, "must have Load context")
        def fac(args):
            return ast.FunctionDef("x", args, [ast.Pass()], [], None)
        self._check_arguments(fac, self.stmt)
Example #11
Source File: test_ast.py    From ironpython3 with Apache License 2.0 5 votes vote down vote up 
def test_if(self):
        self.stmt(ast.If(ast.Num(3), [], []), "empty body on If")
        i = ast.If(ast.Name("x", ast.Store()), [ast.Pass()], [])
        self.stmt(i, "must have Load context")
        i = ast.If(ast.Num(3), [ast.Expr(ast.Name("x", ast.Store()))], [])
        self.stmt(i, "must have Load context")
        i = ast.If(ast.Num(3), [ast.Pass()],
                   [ast.Expr(ast.Name("x", ast.Store()))])
        self.stmt(i, "must have Load context")
Example #12
Source File: test_ast.py    From Project-New-Reign---Nemesis-Main with GNU General Public License v3.0 5 votes vote down vote up 
def test_for(self):
        x = ast.Name("x", ast.Store())
        y = ast.Name("y", ast.Load())
        p = ast.Pass()
        self.stmt(ast.For(x, y, [], []), "empty body on For")
        self.stmt(ast.For(ast.Name("x", ast.Load()), y, [p], []),
                  "must have Store context")
        self.stmt(ast.For(x, ast.Name("y", ast.Store()), [p], []),
                  "must have Load context")
        e = ast.Expr(ast.Name("x", ast.Store()))
        self.stmt(ast.For(x, y, [e], []), "must have Load context")
        self.stmt(ast.For(x, y, [p], [e]), "must have Load context")
Example #13
Source File: test_ast.py    From Project-New-Reign---Nemesis-Main with GNU General Public License v3.0 5 votes vote down vote up 
def test_while(self):
        self.stmt(ast.While(ast.Num(3), [], []), "empty body on While")
        self.stmt(ast.While(ast.Name("x", ast.Store()), [ast.Pass()], []),
                  "must have Load context")
        self.stmt(ast.While(ast.Num(3), [ast.Pass()],
                             [ast.Expr(ast.Name("x", ast.Store()))]),
                             "must have Load context")
Example #14
Source File: test_ast.py    From Project-New-Reign---Nemesis-Main with GNU General Public License v3.0 5 votes vote down vote up 
def test_if(self):
        self.stmt(ast.If(ast.Num(3), [], []), "empty body on If")
        i = ast.If(ast.Name("x", ast.Store()), [ast.Pass()], [])
        self.stmt(i, "must have Load context")
        i = ast.If(ast.Num(3), [ast.Expr(ast.Name("x", ast.Store()))], [])
        self.stmt(i, "must have Load context")
        i = ast.If(ast.Num(3), [ast.Pass()],
                   [ast.Expr(ast.Name("x", ast.Store()))])
        self.stmt(i, "must have Load context")
Example #15
Source File: yacc.py    From yaksok with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
def p_pass_stmt(t):
    '''stmt : PASS NEWLINE'''
    t[0] = ast.Pass()
    t[0].lineno = t.lineno(1)
    t[0].col_offset = -1 # XXX
Example #16
Source File: yacc.py    From yaksok with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
def p_if_else_stmt(t):
    '''stmt : IF expression ELSE suite'''
    pass_ast = ast.Pass()
    pass_ast.lineno = t.lineno(1)
    pass_ast.col_offset = -1 # XXX
    t[0] = ast.If(t[2], [pass_ast], t[4])
    t[0].lineno = t.lineno(4)
    t[0].col_offset = -1  # XXX
Example #17
Source File: python2ir.py    From ppci with BSD 2-Clause "Simplified" License 5 votes vote down vote up 
def gen_statement(self, statement):
        """ Generate code for a statement """
        if isinstance(statement, list):
            for inner_statement in statement:
                self.gen_statement(inner_statement)
        else:
            with self.use_location(statement):
                if isinstance(statement, ast.Pass):
                    pass  # No comments :)
                elif isinstance(statement, ast.Return):
                    self.gen_return(statement)
                elif isinstance(statement, ast.If):
                    self.gen_if(statement)
                elif isinstance(statement, ast.While):
                    self.gen_while(statement)
                elif isinstance(statement, ast.Break):
                    self.gen_break(statement)
                elif isinstance(statement, ast.Continue):
                    self.gen_continue(statement)
                elif isinstance(statement, ast.For):
                    self.gen_for(statement)
                elif isinstance(statement, ast.Assign):
                    self.gen_assign(statement)
                elif isinstance(statement, ast.Expr):
                    self.gen_expr(statement.value)
                elif isinstance(statement, ast.AugAssign):
                    self.gen_aug_assign(statement)
                else:  # pragma: no cover
                    self.not_impl(statement)
Example #18
Source File: definitions.py    From vkbottle with MIT License 5 votes vote down vote up 
def pass_expr(d: ast.Pass):
    return ""
Example #19
Source File: tree.py    From dlint with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
def function_is_empty(function):
    def raise_or_pass_or_docstring(node):
        return (
            isinstance(node, ast.Raise)
            or isinstance(node, ast.Pass)
            or (isinstance(node, ast.Expr) and isinstance(node.value, ast.Str))
        )

    return all(
        raise_or_pass_or_docstring(child)
        for child in function.body
    )
Example #20
Source File: cps.py    From kappa with BSD 2-Clause "Simplified" License 5 votes vote down vote up 
def visit_Pass(self, pass_stmt: ast.Pass, _ctx: CPSTransformerContext) -> VisitReturnT:
        return pass_stmt, []
Example #21
Source File: flatten.py    From kappa with BSD 2-Clause "Simplified" License 5 votes vote down vote up 
def visit_Pass(self, pass_stmt: ast.Pass) -> ActionsT:
        return [pass_stmt]

    # Slices
Example #22
Source File: liveness.py    From kappa with BSD 2-Clause "Simplified" License 5 votes vote down vote up 
def visit_Pass(self, _pass_stmt: ast.Pass) -> None:
        pass
Example #23
Source File: parser.py    From myia with MIT License 5 votes vote down vote up 
def process_Pass(self, block: "Block", node: ast.Pass) -> "Block":
        """Process a pass statement."""
        return block
Example #24
Source File: topython.py    From pyrser with GNU General Public License v3.0 5 votes vote down vote up 
def visit_Alt(self, node: parsing.Alt) -> [ast.stmt]:
        """Generates python code for alternatives.

        try:
            try:
                <code for clause>  #raise AltFalse when alternative is False
                raise AltTrue()
            except AltFalse:
                pass
            return False
        except AltTrue:
            pass
        """
        clauses = [self.visit(clause) for clause in node.ptlist]
        for clause in clauses:
            if not isinstance(clause, ast.expr):
                break
        else:
            return ast.BoolOp(ast.Or(), clauses)
        res = ast.Try([], [ast.ExceptHandler(
            ast.Name('AltTrue', ast.Load()), None, [ast.Pass()])], [], [])
        alt_true = [ast.Raise(ast.Call(
            ast.Name('AltTrue', ast.Load()), [], [], None, None), None)]
        alt_false = [ast.ExceptHandler(
            ast.Name('AltFalse', ast.Load()), None, [ast.Pass()])]
        self.in_try += 1
        for clause in node.ptlist:
            res.body.append(
                ast.Try(self._clause(self.visit(clause)) + alt_true,
                        alt_false, [], []))
        self.in_try -= 1
        res.body.append(self.__exit_scope())
        return [res]
Example #25
Source File: node_transformers.py    From pynt with GNU General Public License v3.0 5 votes vote down vote up 
def visit_Continue(self, cont):
        """

        >>> self = FirstPassForSimple('foo')
        >>> code = 'continue'
        >>> module = ast.parse(code)
        >>> cont, = module.body

        """
        return ast.Pass()
Example #26
Source File: node_transformers.py    From pynt with GNU General Public License v3.0 5 votes vote down vote up 
def visit_Break(self, broken):
        """

        >>> self = FirstPassForSimple('foo')
        >>> code = 'break'
        >>> module = ast.parse(code)
        >>> broken, = module.body

        """
        return ast.Pass()
Example #27
Source File: node_transformers.py    From pynt with GNU General Public License v3.0 5 votes vote down vote up 
def visit_For(self, loop_):
        """
        >>> self = FirstPassFor(buffer='foo')
        >>> code = '''
        ...
        ... for i in range(5):
        ...     for j in range(5):
        ...         k = i + j
        ...         print(k)
        ...
        ... '''
        >>> tree = ast.parse(code)
        >>> loop_, = tree.body

        """
        loop = self.generic_visit(loop_)
        var = ast.Name(id=__random_string__(), ctx=ast.Store())
        assign = ast.Assign(targets=[var], value=ast.Call(func=ast.Name(id='iter', ctx=ast.Load()), args=[loop.iter], keywords=[]))
        first_pass = ast.Try(
            body=[ast.Assign(targets=[loop.target], value=ast.Call(func=ast.Name(id='next', ctx=ast.Load()), args=[ast.Name(id=var, ctx=ast.Load())], keywords=[]))],
            handlers=[ast.ExceptHandler(type=ast.Name(id='StopIteration', ctx=ast.Load()), name=None, body=[ast.Pass()])],
            orelse=loop.body,
            finalbody=[]
        )
        content = f'`for {astor.to_source(loop.target).strip()} in {astor.to_source(loop.iter).strip()} ...`'
        return [
            make_annotation(buffer=self.buffer, content=content, cell_type='2', lineno=loop.lineno),
            ast.Expr(loop.iter),
            assign,
            first_pass
        ]
Example #28
Source File: test_ast.py    From Fluid-Designer with GNU General Public License v3.0 5 votes vote down vote up 
def test_funcdef(self):
        a = ast.arguments([], None, [], [], None, [])
        f = ast.FunctionDef("x", a, [], [], None)
        self.stmt(f, "empty body on FunctionDef")
        f = ast.FunctionDef("x", a, [ast.Pass()], [ast.Name("x", ast.Store())],
                            None)
        self.stmt(f, "must have Load context")
        f = ast.FunctionDef("x", a, [ast.Pass()], [],
                            ast.Name("x", ast.Store()))
        self.stmt(f, "must have Load context")
        def fac(args):
            return ast.FunctionDef("x", args, [ast.Pass()], [], None)
        self._check_arguments(fac, self.stmt)
Example #29
Source File: test_ast.py    From Fluid-Designer with GNU General Public License v3.0 5 votes vote down vote up 
def test_for(self):
        x = ast.Name("x", ast.Store())
        y = ast.Name("y", ast.Load())
        p = ast.Pass()
        self.stmt(ast.For(x, y, [], []), "empty body on For")
        self.stmt(ast.For(ast.Name("x", ast.Load()), y, [p], []),
                  "must have Store context")
        self.stmt(ast.For(x, ast.Name("y", ast.Store()), [p], []),
                  "must have Load context")
        e = ast.Expr(ast.Name("x", ast.Store()))
        self.stmt(ast.For(x, y, [e], []), "must have Load context")
        self.stmt(ast.For(x, y, [p], [e]), "must have Load context")
Example #30
Source File: test_ast.py    From Fluid-Designer with GNU General Public License v3.0 5 votes vote down vote up 
def test_while(self):
        self.stmt(ast.While(ast.Num(3), [], []), "empty body on While")
        self.stmt(ast.While(ast.Name("x", ast.Store()), [ast.Pass()], []),
                  "must have Load context")
        self.stmt(ast.While(ast.Num(3), [ast.Pass()],
                             [ast.Expr(ast.Name("x", ast.Store()))]),
                             "must have Load context")