定义变量:
x = {'a': 1, 'b': 2}
y = {'b': 3, 'c': 4}使用Python3:
z = {**x, **y}使用Python2
z = dict(x, **y)[1]: https://doc.niknk.com/usr/uploads/2019/12/1158661619.jpeg
      x = {'a': 1, 'b': 2}
y = {'b': 3, 'c': 4}z = {**x, **y}z = dict(x, **y)[1]: https://doc.niknk.com/usr/uploads/2019/12/1158661619.jpeg
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