python write() argument must be str, not bytes

python pickle

from __future__ import absolute_import from __future__ import division from __future__ import print_function import pickle dic = { "key" : "111", "id" : "222", "value" : 333, "name" : "nihao", "age" : 18, } file_object = open('./test.pkl', 'w') pickle.dump(dic,file_object,0) file_object = open('./test.pkl', 'r') obj = pickle.load(file_object) print(obj)

在python2环境中,可以成功写入文件,并且可以读取文件. 输出

{'key': '111', 'age': 18, 'id': '222', 'value': 333, 'name': 'nihao'}

同样的代码在python3环境中就不能够写入成功读取成功 在python3中的输出

Traceback (most recent call last): File "pktest.py", line 26, in <module> pickle.dump(dic,file_object,0) TypeError: write() argument must be str, not bytes

如果想在python3中运行相同的代码 需要在代码读取文件处type加b

from __future__ import absolute_import from __future__ import division from __future__ import print_function import pickle dic = { "key" : "111", "id" : "222", "value" : 333, "name" : "nihao", "age" : 18, } file_object = open('./test.pkl', 'wb') pickle.dump(dic,file_object,0) file_object = open('./test.pkl', 'rb') obj = pickle.load(file_object) print(obj)

这份代码可以在python2和python3都输出

{'id': '222', 'value': 333, 'name': 'nihao', 'key': '111', 'age': 18}

转载于:https://www.cnblogs.com/vercont/p/10210166.html