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- #!/usr/bin/python3
- """Demonstrates sorting dicts based on keys that might be missing"""
- def make_keyfun(key, missingfirst=True):
- def keyfun(item):
- try:
- value = item[key]
- except KeyError:
- return (not missingfirst, )
- else:
- return (missingfirst, value)
- return keyfun
- def main():
- listofdicts = [{'foo': 1, 'bar': 2},
- {'bar': 3},
- {'foo': 4, 'bar': 5},
- ]
- print(sorted(listofdicts, key=make_keyfun('foo', missingfirst=False)))
- if __name__ == '__main__':
- main()
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