def eval_atom(context, atom):
"""
Basically to process ``atom`` nodes. The parser sometimes doesn't
generate the node (because it has just one child). In that case an atom
might be a name or a literal as well.
"""
if atom.type == 'name':
if atom.value in ('True', 'False', 'None'):
# Python 2...
return ContextSet(
[compiled.builtin_from_name(context.evaluator, atom.value)])
# This is the first global lookup.
stmt = tree.search_ancestor(atom, 'expr_stmt', 'lambdef') or atom
if stmt.type == 'lambdef':
stmt = atom
position = stmt.start_pos
if _is_annotation_name(atom):
# Since Python 3.7 (with from __future__ import annotations),
# annotations are essentially strings and can reference objects
# that are defined further down in code. Therefore just set the
# position to None, so the finder will not try to stop at a certain
# position in the module.
position = None
return context.py__getattribute__(name_or_str=atom,
position=position,
search_global=True)
elif atom.type == 'keyword':
# For False/True/None
if atom.value in ('False', 'True', 'None'):
return ContextSet(
[compiled.builtin_from_name(context.evaluator, atom.value)])
elif atom.value == 'print':
# print e.g. could be evaluated like this in Python 2.7
return NO_CONTEXTS
elif atom.value == 'yield':
# Contrary to yield from, yield can just appear alone to return a
# value when used with `.send()`.
return NO_CONTEXTS
assert False, 'Cannot evaluate the keyword %s' % atom
elif isinstance(atom, tree.Literal):
string = context.evaluator.compiled_subprocess.safe_literal_eval(
atom.value)
return ContextSet(
[compiled.create_simple_object(context.evaluator, string)])
elif atom.type == 'strings':
# Will be multiple string.
context_set = eval_atom(context, atom.children[0])
for string in atom.children[1:]:
right = eval_atom(context, string)
context_set = _eval_comparison(context.evaluator, context,
context_set, u'+', right)
return context_set
elif atom.type == 'fstring':
return compiled.get_string_context_set(context.evaluator)
else:
c = atom.children
# Parentheses without commas are not tuples.
if c[0] == '(' and not len(c) == 2 \
and not(c[1].type == 'testlist_comp' and
len(c[1].children) > 1):
return context.eval_node(c[1])
try:
comp_for = c[1].children[1]
except (IndexError, AttributeError):
pass
else:
if comp_for == ':':
# Dict comprehensions have a colon at the 3rd index.
try:
comp_for = c[1].children[3]
except IndexError:
pass
if comp_for.type in ('comp_for', 'sync_comp_for'):
return ContextSet([
iterable.comprehension_from_atom(context.evaluator,
context, atom)
])
# It's a dict/list/tuple literal.
array_node = c[1]
try:
array_node_c = array_node.children
except AttributeError:
array_node_c = []
if c[0] == '{' and (array_node == '}' or ':' in array_node_c
or '**' in array_node_c):
context = iterable.DictLiteralContext(context.evaluator, context,
atom)
else:
context = iterable.SequenceLiteralContext(context.evaluator,
context, atom)
return ContextSet([context])
def eval_atom(context, atom):
"""
Basically to process ``atom`` nodes. The parser sometimes doesn't
generate the node (because it has just one child). In that case an atom
might be a name or a literal as well.
"""
if atom.type == 'name':
# This is the first global lookup.
stmt = tree.search_ancestor(
atom, 'expr_stmt', 'lambdef'
) or atom
if stmt.type == 'lambdef':
stmt = atom
return context.py__getattribute__(
name_or_str=atom,
position=stmt.start_pos,
search_global=True
)
elif atom.type == 'keyword':
# For False/True/None
if atom.value in ('False', 'True', 'None'):
return ContextSet(compiled.builtin_from_name(context.evaluator, atom.value))
elif atom.value == 'print':
# print e.g. could be evaluated like this in Python 2.7
return NO_CONTEXTS
elif atom.value == 'yield':
# Contrary to yield from, yield can just appear alone to return a
# value when used with `.send()`.
return NO_CONTEXTS
assert False, 'Cannot evaluate the keyword %s' % atom
elif isinstance(atom, tree.Literal):
string = context.evaluator.compiled_subprocess.safe_literal_eval(atom.value)
return ContextSet(compiled.create_simple_object(context.evaluator, string))
elif atom.type == 'strings':
# Will be multiple string.
context_set = eval_atom(context, atom.children[0])
for string in atom.children[1:]:
right = eval_atom(context, string)
context_set = _eval_comparison(context.evaluator, context, context_set, u'+', right)
return context_set
else:
c = atom.children
# Parentheses without commas are not tuples.
if c[0] == '(' and not len(c) == 2 \
and not(c[1].type == 'testlist_comp' and
len(c[1].children) > 1):
return context.eval_node(c[1])
try:
comp_for = c[1].children[1]
except (IndexError, AttributeError):
pass
else:
if comp_for == ':':
# Dict comprehensions have a colon at the 3rd index.
try:
comp_for = c[1].children[3]
except IndexError:
pass
if comp_for.type == 'comp_for':
return ContextSet(iterable.comprehension_from_atom(
context.evaluator, context, atom
))
# It's a dict/list/tuple literal.
array_node = c[1]
try:
array_node_c = array_node.children
except AttributeError:
array_node_c = []
if c[0] == '{' and (array_node == '}' or ':' in array_node_c):
context = iterable.DictLiteralContext(context.evaluator, context, atom)
else:
context = iterable.SequenceLiteralContext(context.evaluator, context, atom)
return ContextSet(context)
def eval_atom(context, atom):
"""
Basically to process ``atom`` nodes. The parser sometimes doesn't
generate the node (because it has just one child). In that case an atom
might be a name or a literal as well.
"""
if atom.type == 'name':
# This is the first global lookup.
stmt = tree.search_ancestor(
atom, 'expr_stmt', 'lambdef'
) or atom
if stmt.type == 'lambdef':
stmt = atom
return context.py__getattribute__(
name_or_str=atom,
position=stmt.start_pos,
search_global=True
)
elif isinstance(atom, tree.Literal):
string = context.evaluator.compiled_subprocess.safe_literal_eval(atom.value)
return ContextSet(compiled.create_simple_object(context.evaluator, string))
else:
c = atom.children
if c[0].type == 'string':
# Will be one string.
context_set = eval_atom(context, c[0])
for string in c[1:]:
right = eval_atom(context, string)
context_set = _eval_comparison(context.evaluator, context, context_set, u'+', right)
return context_set
# Parentheses without commas are not tuples.
elif c[0] == '(' and not len(c) == 2 \
and not(c[1].type == 'testlist_comp' and
len(c[1].children) > 1):
return context.eval_node(c[1])
try:
comp_for = c[1].children[1]
except (IndexError, AttributeError):
pass
else:
if comp_for == ':':
# Dict comprehensions have a colon at the 3rd index.
try:
comp_for = c[1].children[3]
except IndexError:
pass
if comp_for.type == 'comp_for':
return ContextSet(iterable.comprehension_from_atom(
context.evaluator, context, atom
))
# It's a dict/list/tuple literal.
array_node = c[1]
try:
array_node_c = array_node.children
except AttributeError:
array_node_c = []
if c[0] == '{' and (array_node == '}' or ':' in array_node_c):
context = iterable.DictLiteralContext(context.evaluator, context, atom)
else:
context = iterable.SequenceLiteralContext(context.evaluator, context, atom)
return ContextSet(context)
