浅析Python 赋值、浅复制（拷贝）与深度（复制）拷贝 浅析Python 赋值、浅复制（拷贝）与深度（复制）拷贝

import copy
y = copy.deepcopy(x)

import copy
x = {'course':['python','linux']}
y1 = x
y2 = x.copy()
y3 = copy.deepcopy(x)
x['course'].append('java')
print x
print y1
print y2
print y3
----------------------------------------
result:
x  =>   {'course': ['python', 'linux', 'java']}
y1 =>   {'course': ['python', 'linux', 'java']}
y2 =>   {'course': ['python', 'linux', 'java']}
y3 =>   {'course': ['python', 'linux']}