一）增加一个或多个元素
d = {‘a‘: 1}
d.update(b=2)print(d)-->{‘a‘: 1, ‘b‘: 2} d.update(c=3, d=4)print(d)-->{‘a‘: 1, ‘c‘: 3, ‘b‘: 2, ‘d‘: 4} d[‘e‘] = 5print(d)-->{‘a‘: 1, ‘c‘: 3, ‘b‘: 2, ‘e‘: 5, ‘d‘: 4}d.update({‘f‘: 6, ‘g‘: 7})print(d)-->{‘a‘: 1, ‘c‘: 3, ‘b‘: 2, ‘e‘: 5, ‘d‘: 4, ‘g‘: 7, ‘f‘: 6}二）删除一个或多个元素
def remove_key(d, key):
r = dict(d)
del r[key]
return r
x = {1: 2, 3: 4, 4: 3, 2: 1, 0: 0}
x.pop(1)
print(x)
x = {1: 2, 3: 4, 4: 3, 2: 1, 0: 0}
del x[1]
print(x)
x = {1: 2, 3: 4, 4: 3, 2: 1, 0: 0}
print(remove_key(x, 1))
print(x)
‘‘‘
输出:
{0: 0, 2: 1, 3: 4, 4: 3}
{0: 0, 2: 1, 3: 4, 4: 3}
{0: 0, 2: 1, 3: 4, 4: 3}
{0: 0, 1: 2, 2: 1, 3: 4, 4: 3}
‘‘‘
