5bf3765631
The empty tuple is usually a constant object, but named tuples must be allocated to allow modification. Added explicit allocation to fix this. Also added a regression test to verify creating an empty named tuple works. Fixes issue #7870. Signed-off-by: Lars Haulin <lars.haulin@gmail.com>
93 lines
1.7 KiB
Python
93 lines
1.7 KiB
Python
try:
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try:
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from ucollections import namedtuple
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except ImportError:
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from collections import namedtuple
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except ImportError:
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print("SKIP")
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raise SystemExit
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T = namedtuple("Tup", ["foo", "bar"])
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# CPython prints fully qualified name, what we don't bother to do so far
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#print(T)
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for t in T(1, 2), T(bar=1, foo=2):
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print(t)
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print(t[0], t[1])
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print(t.foo, t.bar)
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print(len(t))
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print(bool(t))
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print(t + t)
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print(t * 3)
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print([f for f in t])
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print(isinstance(t, tuple))
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# Check tuple can compare equal to namedtuple with same elements
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print(t == (t[0], t[1]), (t[0], t[1]) == t)
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# Create using positional and keyword args
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print(T(3, bar=4))
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try:
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t[0] = 200
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except TypeError:
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print("TypeError")
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try:
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t.bar = 200
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except AttributeError:
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print("AttributeError")
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try:
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t = T(1)
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except TypeError:
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print("TypeError")
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try:
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t = T(1, 2, 3)
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except TypeError:
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print("TypeError")
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try:
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t = T(foo=1)
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except TypeError:
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print("TypeError")
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try:
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t = T(1, foo=1)
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except TypeError:
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print("TypeError")
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# enough args, but kw is wrong
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try:
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t = T(1, baz=3)
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except TypeError:
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print("TypeError")
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# bad argument for member spec
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try:
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namedtuple('T', 1)
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except TypeError:
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print("TypeError")
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# Try single string
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T3 = namedtuple("TupComma", "foo bar")
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t = T3(1, 2)
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print(t.foo, t.bar)
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# Try tuple
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T4 = namedtuple("TupTuple", ("foo", "bar"))
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t = T4(1, 2)
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print(t.foo, t.bar)
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# Try single string with comma field separator
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# Not implemented so far
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#T2 = namedtuple("TupComma", "foo,bar")
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#t = T2(1, 2)
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# Creating an empty namedtuple should not segfault
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T5 = namedtuple("TupEmpty", [])
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t = T5()
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print(t)
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