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try:
from collections import deque
except ImportError:
print("SKIP")
raise SystemExit
d = deque((), 2)
print(len(d))
print(bool(d))
try:
d.popleft()
except IndexError:
print("IndexError")
print(d.append(1))
print(len(d))
print(bool(d))
print(d.popleft())
print(len(d))
d.append(2)
print(d.popleft())
d.append(3)
d.append(4)
print(len(d))
print(d.popleft(), d.popleft())
try:
d.popleft()
except IndexError:
print("IndexError")
d.append(5)
d.append(6)
d.append(7)
print(len(d))
print(d.popleft(), d.popleft())
print(len(d))
try:
d.popleft()
except IndexError:
print("IndexError")
# Case where get index wraps around when appending to full deque
d = deque((), 2)
d.append(1)
d.append(2)
d.append(3)
d.append(4)
d.append(5)
print(d.popleft(), d.popleft())
# Negative maxlen is not allowed
try:
deque((), -1)
except ValueError:
print("ValueError")
# Unsupported unary op
try:
~d
except TypeError:
print("TypeError")
# Same tests, but now with pop() and appendleft()
d = deque((), 2)
print(len(d))
print(bool(d))
try:
d.popleft()
except IndexError:
print("IndexError")
print(d.append(1))
print(len(d))
print(bool(d))
print(d.popleft())
print(len(d))
d.append(2)
print(d.popleft())
d.append(3)
d.append(4)
print(len(d))
print(d.popleft(), d.popleft())
try:
d.popleft()
except IndexError:
print("IndexError")
d.append(5)
d.append(6)
d.append(7)
print(len(d))
print(d.popleft(), d.popleft())
print(len(d))
try:
d.popleft()
except IndexError:
print("IndexError")
d = deque((), 2)
d.appendleft(1)
d.appendleft(2)
d.appendleft(3)
d.appendleft(4)
d.appendleft(5)
print(d.pop(), d.pop())
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