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class AppTestNestedScope:
def test_nested_scope(self):
x = 42
def f(): return x
assert f() == 42
def test_nested_scope2(self):
x = 42
y = 3
def f(): return x
assert f() == 42
def test_nested_scope3(self):
x = 42
def f():
def g():
return x
return g
assert f()() == 42
def test_nested_scope4(self):
def f():
x = 3
def g():
return x
a = g()
x = 4
b = g()
return (a, b)
assert f() == (3, 4)
def test_nested_scope_locals(self):
def f():
x = 3
def g():
i = x
return locals()
return g()
d = f()
assert d == {'i':3, 'x':3}
def test_deeply_nested_scope_locals(self):
def f():
x = 3
def g():
def h():
i = x
return locals()
return locals(), h()
return g()
outer_locals, inner_locals = f()
assert inner_locals == {'i':3, 'x':3}
keys = sorted(outer_locals.keys())
assert keys == ['h', 'x']
def test_lambda_in_genexpr(self):
assert [x() for x in (lambda: x for x in range(10))] == list(range(10))
def test_cell_repr(self):
import re
from reprlib import repr as r # Don't shadow builtin repr
def get_cell():
x = 42
def inner():
return x
return inner
x = get_cell().__closure__[0]
assert re.match(r'<cell at 0x[0-9A-Fa-f]+: int object at 0x[0-9A-Fa-f]+>', repr(x))
assert re.match(r'<cell at 0x.*\.\.\..*>', r(x))
def get_cell():
if False:
x = 42
def inner():
return x
return inner
x = get_cell().__closure__[0]
assert re.match(r'<cell at 0x[0-9A-Fa-f]+: empty>', repr(x))
def test_cell_contents(self):
def f(x):
def f(y):
return x + y
return f
g = f(10)
assert g.__closure__[0].cell_contents == 10
def test_empty_cell_contents(self):
def f():
def f(y):
return x + y
return f
x = 1
g = f()
raises(ValueError, "g.__closure__[0].cell_contents")
def test_compare_cells(self):
def f(n):
if n:
x = n
def f(y):
return x + y
return f
empty_cell_1 = f(0).__closure__[0]
empty_cell_2 = f(0).__closure__[0]
g1 = f(1).__closure__[0]
g2 = f(2).__closure__[0]
assert g1 < g2
assert g1 <= g2
assert g2 > g1
assert g2 >= g1
assert not g1 == g2
assert g1 != g2
#
assert empty_cell_1 == empty_cell_2
assert not empty_cell_1 != empty_cell_2
assert empty_cell_1 < g1
def test_leaking_class_locals(self):
def f(x):
class X:
x = 12
def f(self):
return x
locals()
return X
assert f(1).x == 12
def test_nested_scope_locals_mutating_cellvars(self):
def f():
x = 12
def m():
locals()
x
locals()
return x
return m
assert f()() == 12
def test_unbound_local_after_del(self):
"""
# #4617: It is now legal to delete a cell variable.
# The following functions must obviously compile,
# and give the correct error when accessing the deleted name.
def errorInOuter():
y = 1
del y
print(y)
def inner():
return y
def errorInInner():
def inner():
return y
y = 1
del y
inner()
raises(UnboundLocalError, "errorInOuter()")
raises(NameError, "errorInInner()")
"""
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