Python pickle模块

Posted 2020-08-17

pickle模块中主要有dumps()函数、loads()函数、dump() 函数、load() 函数。

#pickle.dumps(‘object‘)     #序列化对象，返回值不可直接读
#pickle.dump(‘object‘, f)      #序列化对象到文件中
#pickle.loads(‘object‘)     #反序列化对象
#pickle.load( f)     #从文件中反序列对象，返回原先的object

import pickle

obj = 123,"abcdedf",["ac",123],{"key":"value","key1":"value1"}

#pickle.dumps(‘object‘)     #序列化对象，返回值不可直接读
#pickle.dump(‘object‘, f)      #序列化对象到文件中
#pickle.loads(‘object‘)     #反序列化对象
#pickle.load(f)     #从文件中反序列对象，返回原先的object

r1 = pickle.dumps(obj)
print(r1)

r2 = pickle.loads(r1)
print(r2)

#f = open(‘db‘, ‘rb+‘)  #‘db‘是文件名
#pickle.dump(obj, f)
#f.close()

with open(‘db‘, ‘rb+‘) as f:
    pickle.dump(obj, f)

with open(‘db‘, ‘rb‘) as f:
    r3 = pickle.load(f)
    print(r3)

注意：pickle以二进制处理，所以文件打开方式应该加上b, 如‘wb‘或‘rb‘如果仅以w或r方式打开则会报错