71 lines
1.0 KiB
Python
71 lines
1.0 KiB
Python
# basic dictionary
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d = {}
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print(d)
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d[2] = 123
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print(d)
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d = {1:2}
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d[3] = 3
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print(len(d), d[1], d[3])
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d[1] = 0
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print(len(d), d[1], d[3])
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print(str(d) == '{1: 0, 3: 3}' or str(d) == '{3: 3, 1: 0}')
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x = 1
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while x < 100:
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d[x] = x
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x += 1
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print(d[50])
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# equality operator on dicts of different size
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print({} == {1:1})
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# equality operator on dicts of same size but with different keys
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print({1:1} == {2:1})
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# 0 replacing False's item
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d = {}
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d[False] = 'false'
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d[0] = 'zero'
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print(d)
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# False replacing 0's item
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d = {}
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d[0] = 'zero'
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d[False] = 'false'
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print(d)
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# 1 replacing True's item
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d = {}
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d[True] = 'true'
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d[1] = 'one'
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print(d)
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# True replacing 1's item
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d = {}
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d[1] = 'one'
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d[True] = 'true'
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print(d)
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# mixed bools and integers
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d = {False:10, True:11, 2:12}
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print(d[0], d[1], d[2])
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# value not found
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try:
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{}[0]
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except KeyError as er:
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print('KeyError', er, er.args)
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# unsupported unary op
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try:
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+{}
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except TypeError:
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print('TypeError')
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# unsupported binary op
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try:
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{} + {}
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except TypeError:
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print('TypeError')
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