Python format processing --json

json character string

1. menu = \
2. {
3. "breakfast":{
4. "hours":"7-11",
5. "items":{
6. "breakfast burritos":"$6.00",
7. "pancakes":"$4.00"
8. }
9. },
10. "lunch":{
11. "hours":"11-3",
12. "items":{
13. "hamburger":"$5.00"
14. }
15. },
16. "dinner":{
17. "hours":"3-10",
18. "items":{
19. "spaghetti":"$8.00"
20. }
21. }
22. }

1. import json
2. menu_json = json.dumps(menu)
3. menu_json
4. menu2 = json.loads(menu_json)# It can be interpreted as python structure
5. import datetime
6.     now = datetime.datetime.utcnow()
7. json.dumps(now)# Unable to convert , Because of the standard json No date defined
8. # transformation
9. now_str = str(now)
10. json.dumps(now_str)# You can convert
11. from time import mktime
12. now_epoch = int(mktime(now.timetuple()))
13. json.dumps(now_epoch)# Can convert epoch value
14. classDTEncoder(json.JSONEncoder):# Inherit overloads default Method
15. def default(self, obj):
16. # isinstance() Check obj The type of
17. if isinstance(obj, datetime.datetime):
18. return int(mktime(obj.timetuple()))
19. # Otherwise, it's what ordinary decoders know ：
20. return json.JSONEncoder.default(self, obj)
21. json.dumps(now, cls=DTEncoder)