ACIL FM

Nama	Ukuran	Aksi
__pycache__	-	Open
asyncfilters.py	4.15 MB	View DL Edit
asyncsupport.py	7.04 MB	View DL Edit
bccache.py	11.85 MB	View DL Edit
compiler.py	64.73 MB	View DL Edit
constants.py	1.42 MB	View DL Edit
debug.py	8.37 MB	View DL Edit
defaults.py	1.1 MB	View DL Edit
environment.py	49.44 MB	View DL Edit
exceptions.py	5.3 MB	View DL Edit
ext.py	25.82 MB	View DL Edit
filters.py	41.41 MB	View DL Edit
idtracking.py	9 MB	View DL Edit
lexer.py	29.62 MB	View DL Edit
loaders.py	17.25 MB	View DL Edit
meta.py	4.03 MB	View DL Edit
nativetypes.py	2.75 MB	View DL Edit
nodes.py	30.37 MB	View DL Edit
optimizer.py	1.42 MB	View DL Edit
parser.py	34.82 MB	View DL Edit
runtime.py	29.9 MB	View DL Edit
sandbox.py	17.12 MB	View DL Edit
tests.py	4.69 MB	View DL Edit
utils.py	21.91 MB	View DL Edit
visitor.py	3.16 MB	View DL Edit
_compat.py	3.12 MB	View DL Edit
_identifier.py	1.73 MB	View DL Edit
__init__.py	1.51 MB	View DL Edit

Edit file: /usr/lib/python3.9/site-packages/jinja2/visitor.py

# -*- coding: utf-8 -*-
"""API for traversing the AST nodes. Implemented by the compiler and
meta introspection.
"""
from .nodes import Node

class NodeVisitor(object):
    """Walks the abstract syntax tree and call visitor functions for every
    node found.  The visitor functions may return values which will be
    forwarded by the `visit` method.

Per default the visitor functions for the nodes are ``'visit_'`` +
    class name of the node.  So a `TryFinally` node visit function would
    be `visit_TryFinally`.  This behavior can be changed by overriding
    the `get_visitor` function.  If no visitor function exists for a node
    (return value `None`) the `generic_visit` visitor is used instead.
    """

def get_visitor(self, node):
        """Return the visitor function for this node or `None` if no visitor
        exists for this node.  In that case the generic visit function is
        used instead.
        """
        method = "visit_" + node.__class__.__name__
        return getattr(self, method, None)

def visit(self, node, *args, **kwargs):
        """Visit a node."""
        f = self.get_visitor(node)
        if f is not None:
            return f(node, *args, **kwargs)
        return self.generic_visit(node, *args, **kwargs)

def generic_visit(self, node, *args, **kwargs):
        """Called if no explicit visitor function exists for a node."""
        for node in node.iter_child_nodes():
            self.visit(node, *args, **kwargs)

class NodeTransformer(NodeVisitor):
    """Walks the abstract syntax tree and allows modifications of nodes.

The `NodeTransformer` will walk the AST and use the return value of the
    visitor functions to replace or remove the old node.  If the return
    value of the visitor function is `None` the node will be removed
    from the previous location otherwise it's replaced with the return
    value.  The return value may be the original node in which case no
    replacement takes place.
    """

def generic_visit(self, node, *args, **kwargs):
        for field, old_value in node.iter_fields():
            if isinstance(old_value, list):
                new_values = []
                for value in old_value:
                    if isinstance(value, Node):
                        value = self.visit(value, *args, **kwargs)
                        if value is None:
                            continue
                        elif not isinstance(value, Node):
                            new_values.extend(value)
                            continue
                    new_values.append(value)
                old_value[:] = new_values
            elif isinstance(old_value, Node):
                new_node = self.visit(old_value, *args, **kwargs)
                if new_node is None:
                    delattr(node, field)
                else:
                    setattr(node, field, new_node)
        return node

def visit_list(self, node, *args, **kwargs):
        """As transformers may return lists in some places this method
        can be used to enforce a list as return value.
        """
        rv = self.visit(node, *args, **kwargs)
        if not isinstance(rv, list):
            rv = [rv]
        return rv

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