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# mode: run
# tag: control-flow, uninitialized
def conditional(cond):
"""
>>> conditional(True)
[]
>>> conditional(False) # doctest: +ELLIPSIS
Traceback (most recent call last):
...
UnboundLocalError: ...local variable 'a'...
"""
if cond:
a = []
return a
def inside_loop(iter):
"""
>>> inside_loop([1,2,3])
3
>>> inside_loop([]) # doctest: +ELLIPSIS
Traceback (most recent call last):
...
UnboundLocalError: ...local variable 'i'...
"""
for i in iter:
pass
return i
def try_except(cond):
"""
>>> try_except(True)
[]
>>> try_except(False) # doctest: +ELLIPSIS
Traceback (most recent call last):
...
UnboundLocalError: ...local variable 'a'...
"""
try:
if cond:
a = []
raise ValueError
except ValueError:
return a
def try_finally(cond):
"""
>>> try_finally(True)
[]
>>> try_finally(False) # doctest: +ELLIPSIS
Traceback (most recent call last):
...
UnboundLocalError: ...local variable 'a'...
"""
try:
if cond:
a = []
raise ValueError
finally:
return a
def deleted(cond):
"""
>>> deleted(False)
{}
>>> deleted(True) # doctest: +ELLIPSIS
Traceback (most recent call last):
...
UnboundLocalError: ...local variable 'a'...
"""
a = {}
if cond:
del a
return a
def test_nested(cond):
"""
>>> test_nested(True)
>>> test_nested(False) # doctest: +ELLIPSIS
Traceback (most recent call last):
...
UnboundLocalError: ...local variable 'a'...
"""
if cond:
def a():
pass
return a()
def test_outer(cond):
"""
>>> test_outer(True)
{}
>>> test_outer(False) # doctest: +ELLIPSIS
Traceback (most recent call last):
...
UnboundLocalError: ...local variable 'a'...
"""
if cond:
a = {}
def inner():
return a
return a
def test_inner(cond):
"""
>>> test_inner(True)
{}
>>> test_inner(False) # doctest: +ELLIPSIS
Traceback (most recent call last):
...
NameError: ...free variable 'a' ... in enclosing scope
"""
if cond:
a = {}
def inner():
return a
return inner()
def test_class(cond):
"""
>>> test_class(True)
1
>>> test_class(False) # doctest: +ELLIPSIS
Traceback (most recent call last):
...
UnboundLocalError: ...local variable 'A'...
"""
if cond:
class A:
x = 1
return A.x
def test_try_except_regression(c):
"""
>>> test_try_except_regression(True)
(123,)
>>> test_try_except_regression(False) # doctest: +ELLIPSIS
Traceback (most recent call last):
...
UnboundLocalError: ...local variable 'a'...
"""
if c:
a = (123,)
try:
return a
except:
return a
def test_try_finally_regression(c):
"""
>>> test_try_finally_regression(True)
(123,)
>>> test_try_finally_regression(False) # doctest: +ELLIPSIS
Traceback (most recent call last):
...
UnboundLocalError: ...local variable 'a'...
"""
if c:
a = (123,)
try:
return a
finally:
return a
def test_expression_calculation_order_bug(a):
"""
>>> test_expression_calculation_order_bug(False)
[]
>>> test_expression_calculation_order_bug(True) # doctest: +ELLIPSIS
Traceback (most recent call last):
...
UnboundLocalError: ...local variable 'b'...
"""
if not a:
b = []
return (a or b) and (b or a)
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