Python - 字典(dict)删除元素

# -*- coding: utf-8 -*-

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}
"""