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# basic dictionary
d = {}
print(d)
d[2] = 123
print(d)
d = {1:2}
d[3] = 3
print(len(d), d[1], d[3])
d[1] = 0
print(len(d), d[1], d[3])
print(str(d) == '{1: 0, 3: 3}' or str(d) == '{3: 3, 1: 0}')
x = 1
while x < 100:
d[x] = x
x += 1
print(d[50])
# equality operator on dicts of different size
print({} == {1:1})
# equality operator on dicts of same size but with different keys
print({1:1} == {2:1})
# value not found
try:
{}[0]
except KeyError as er:
print('KeyError', er, er.args)
# unsupported unary op
try:
+{}
except TypeError:
print('TypeError')
# unsupported binary op
try:
{} + {}
except TypeError:
print('TypeError')
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