python技巧 合并两个字典

In [1]: a={'x':2,'y':4}

In [2]: b={'c':1,'d':3}

In [3]: c={'c':3,'y':6}

In [4]:  w={**a,**b}

In [5]: w
Out[5]: {'c': 1, 'd': 3, 'x': 2, 'y': 4}

In [6]:

In [6]:  w={**b,**c}

In [7]: w
Out[7]: {'c': 3, 'd': 3, 'y': 6}

python2版本

>>> w=dict(a,**b)
>>> w
{'y': 4, 'x': 2, 'c': 1, 'd': 3}
>>> w=dict(b,**c)
>>> w
{'y': 6, 'c': 3, 'd': 3}