必须掌握的Python技巧（三）

1、合并两个字典

• 方法一：

def merge_two_dicts(a, b):
    c = a.copy() # make a copy of a
    c.update(b) # modify keys and values of a with the once from b
    return c
a = {
   'x':1,'y':14}
b = {
   'y':314,'z':5, 'a':2, 'b':'0'}
v1 = merge_two_dicts(a,b)
print(v1)

• 方法二：

def merge_dictionaries(a, b):
    return {
   **a, **b}
a = {
    'x': 1, 'y': 2}
b = {
    'y': 3, 'z': 4}
print(merge_dictionaries(a, b))

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2、将两个列表转化为字典（zip方法）

def to_dictionary(keys, values):
    return dict