import json

import pickle

a = """

{'a'::1,

'c':2}

"""

ret = json.loads(a)

print(ret)

# 结果

json.decoder.JSONDecodeError: Expecting property name enclosed in double quotes: line 2 column 2 (char 2)

a不是标准的json字符串，标准的字符串必须使用双引号进行包裹，这点非常重要。

a = """

{"a":1,

"c":2}

"""

ret = json.loads(a)

print(ret)

print(ret["a"])

# 结果

{'a': 1, 'c': 2}

1

import json

import pickle

a = {'a':1,'b':2}

ret = json.dumps(a)  # 将pyhton字典转换为josn字符串，这种情况下对于引号的限制没有那么严格

print(ret)

print(type(ret))

{"a": 1, "b": 2}

<class 'str'>

import pickle

a = {'a':1,'b':2}

b = "哈哈"

c = 1

d = [1,2,3]

ret1 = pickle.dumps(a)

print(ret1)

# b'\x80\x03}q\x00(X\x01\x00\x00\x00aq\x01K\x01X\x01\x00\x00\x00bq\x02K\x02u.'

ret2 = pickle.dumps(b)

print(ret2)

# b'\x80\x03X\x06\x00\x00\x00\xe5\x93\x88\xe5\x93\x88q\x00.'

ret3 = pickle.dumps(c)

print(ret3)

# b'\x80\x03K\x01.'

ret4 = pickle.dumps(d)

print(ret4)

# b'\x80\x03]q\x00(K\x01K\x02K\x03e.'

with open("demo.txt","wb") as f:

    f.write(ret1)



这种情况，就要看ret1的编码格式是什么，python中提供了chardet模块来检查编码格式
import chardet
print(chardet.detect(ret1))
# 结果
{'encoding': 'Windows-1252', 'confidence': 0.73, 'language': ''}

import pickle
import chardet
a = {'a':1,'b':2}

d = [1,2,3]

f = open("test.txt","wb")

pickle.dump(d,f)  # 不同于dumps返回一个二进制的结果，dump直接将文件写入指定位置

f.close()

import pickle

import chardet

a = {'a':1,'b':2}

d = [1,2,3]

ret = pickle.dumps(d)

print(ret)

# b'\x80\x03]q\x00(K\x01K\x02K\x03e.'

ret1 = pickle.loads(ret)   # pickle必须接收的是picke自己dumps的二进制类型文件

print(ret1)

# [1, 2, 3]

import pickle

import chardet

a = ""

ret = a.encode("utf-8")

print(ret)

ret1 = pickle.loads(ret)  # loads的数据，必须是dumps自己处理过的类型才行

print(ret1)

# 结果

_pickle.UnpicklingError: could not find MARK

import pickle

import chardet

a = ""

ret = a.encode("Windows-1252")

print(ret)

ret1 = pickle.loads(ret)

print(ret1)


# 结果

_pickle.UnpicklingError: could not find MARK

import pickle

import chardet

with open("demo.txt","rb") as f:

    ret = pickle.load(f)

print(ret)

# 结果

{'a': 1, 'b': 2}

import json

item1 = {"a":1}

item2 = {"b":1}

item3 = {"c":1}

item4 = {"d":1}

ret = {"data":[item1,item2,item3,item4]}

# 存的时候

demo = json.dumps(ret)

print(type(demo))

# with open("demo.txt","w") as f:

#     f.write(demo)

# 取得时候

with open("demo.txt","r") as f:

    data = f.read()

    data1 = json.loads(data)

print(data1)

print(data1["data"])

info_list = data1["data"]

for i in info_list:

    print(type(i))