60 lines
1.7 KiB
Python
60 lines
1.7 KiB
Python
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import itertools
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from future import utils
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if utils.PY2:
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from __builtin__ import max as _builtin_max, min as _builtin_min
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else:
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from builtins import max as _builtin_max, min as _builtin_min
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_SENTINEL = object()
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def newmin(*args, **kwargs):
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return new_min_max(_builtin_min, *args, **kwargs)
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def newmax(*args, **kwargs):
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return new_min_max(_builtin_max, *args, **kwargs)
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def new_min_max(_builtin_func, *args, **kwargs):
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"""
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To support the argument "default" introduced in python 3.4 for min and max
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:param _builtin_func: builtin min or builtin max
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:param args:
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:param kwargs:
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:return: returns the min or max based on the arguments passed
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"""
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for key, _ in kwargs.items():
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if key not in set(['key', 'default']):
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raise TypeError('Illegal argument %s', key)
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if len(args) == 0:
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raise TypeError
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if len(args) != 1 and kwargs.get('default', _SENTINEL) is not _SENTINEL:
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raise TypeError
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if len(args) == 1:
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iterator = iter(args[0])
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try:
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first = next(iterator)
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except StopIteration:
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if kwargs.get('default', _SENTINEL) is not _SENTINEL:
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return kwargs.get('default')
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else:
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raise ValueError('{}() arg is an empty sequence'.format(_builtin_func.__name__))
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else:
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iterator = itertools.chain([first], iterator)
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if kwargs.get('key') is not None:
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return _builtin_func(iterator, key=kwargs.get('key'))
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else:
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return _builtin_func(iterator)
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if len(args) > 1:
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if kwargs.get('key') is not None:
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return _builtin_func(args, key=kwargs.get('key'))
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else:
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return _builtin_func(args)
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