python 初学（json pickle shelve）

Posted 2021-02-04 mlllily

json：

# _author: lily
# _date: 2019/1/19

import json

my_dict = {‘name‘: ‘lily‘, ‘age‘: 18}
f = open(‘JSON_text‘, ‘w‘)

# data = json.dumps(my_dict)
# f.write(data)
# 上面两句等价于
json.dump(my_dict, f)

f.close()

# _author: lily
# _date: 2019/1/20

import json

f = open(‘JSON_text‘, ‘r‘)

# data = f.read()
# my_dict = json.loads(data)
# 上面两句话等价于
my_dict = json.load(f)

print(my_dict[‘name‘])
f.close()

pickle：

# _author: lily
# _date: 2019/1/20

import pickle

def foo():
    print(‘ok‘)

data = pickle.dumps(foo)
f = open(‘PICKLE_text‘, ‘wb‘)
f.write(data)
f.close()

# _author: lily
# _date: 2019/1/20

import pickle

def foo():
    print(‘okok‘)

f = open(‘PICKLE_text‘, ‘rb‘)
data = f.read()

data = pickle.loads(data)

data()

f.close()

shelve：

# _author: lily
# _date: 2019/1/20

import shelve

# f = shelve.open(‘SHELVE_text‘)
# f[‘info‘] = {‘name‘: ‘lily‘, ‘age‘: 18}


f = shelve.open(‘SHELVE_text‘)
data = f.get(‘info‘)
print(data[‘name‘])