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merge (iterable1, *args)
参数:
iterable1: 实现 __iter__的可迭代对象, 如 str, tuple, dict, list
*args: 其他实现 __iter__的可迭代对象
返回值:
合并后的迭代对象
使用范例:
Example 1: source = ['a', 'b', 'c'] result = merge(source, [1, 2, 3]) self.assertEqual(result, ['a', 'b', 'c', 1, 2, 3]) result = merge(source, [1, 2, 3], ['x', 'y', 'z']) self.assertEqual(result, ['a', 'b', 'c', 1, 2, 3, 'x', 'y', 'z']) Example 2: source = 'abc' result = merge(source, '123') self.assertEqual(result, 'abc123') result = merge(source, '123', 'xyz') self.assertEqual(result, 'abc123xyz') Example 3: source = ('a', 'b', 'c') result = merge(source, (1, 2, 3)) self.assertEqual(result, ('a', 'b', 'c', 1, 2, 3)) result = merge(source, (1, 2, 3), ('x', 'y', 'z')) self.assertEqual(result, ('a', 'b', 'c', 1, 2, 3, 'x', 'y', 'z')) Example 4: source = {'a': 1, 'b': 2, 'c': 3} result = merge(source, {'x': 'm', 'y': 'n'}, {'z': '1'}) self.assertEqual(result, {'a': 1, 'b': 2, 'c': 3, 'x': 'm', 'y': 'n', 'z': '1'})
代码:
@accepts(iterable1='__iter__')def merge(iterable1, *args): """ Returns an type of iterable1 value, which merged after iterable1 used *args :exception TypeError: if any parameter type of args not equals type(iterable1) """ result_list = list(iterable1) if not isinstance(iterable1, dict) else eval('list(iterable1.items())') for i, other in enumerate(args, start=1): if not isinstance(other, type(iterable1)): raise TypeError('the parameter type of index {} not equals type of index 0'.format(i)) if not isinstance(other, dict): result_list[len(result_list):len(result_list)] = list(other) else: result_list[len(result_list):len(result_list)] = list(other.items()) if isinstance(iterable1, str): return ''.join(result_list) elif isinstance(iterable1, tuple): return tuple(result_list) elif isinstance(iterable1, dict): return dict(result_list) else: return result_list