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try:
from collections import OrderedDict
except ImportError:
print("SKIP")
raise SystemExit
d = OrderedDict([(10, 20), ("b", 100), (1, 2)])
print(len(d))
print(list(d.keys()))
print(list(d.values()))
del d["b"]
print(len(d))
print(list(d.keys()))
print(list(d.values()))
# access remaining elements after deleting
print(d[10], d[1])
# add an element after deleting
d["abc"] = 123
print(len(d))
print(list(d.keys()))
print(list(d.values()))
# pop an element
print(d.popitem())
print(len(d))
print(list(d.keys()))
print(list(d.values()))
# add an element after popping
d["xyz"] = 321
print(len(d))
print(list(d.keys()))
print(list(d.values()))
# pop until empty
print(d.popitem())
print(d.popitem())
try:
d.popitem()
except:
print('empty')
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