I m trying to convert the following dict into JSON using json.dumps:
{
'post_engaged': 36,
'post_impressions': 491,
'post_story': 23,
'comment_count': 6,
'created_time': '03:02 AM, Sep 30, 2012',
'message': 'Specialities of Shaktis and Pandavas. \n While having power, why there isn\\u2019t',
< built - in function id > : '471662059541196',
'status_type': 'status',
'likes_count': 22
} {
'post_engaged': 24,
'text': '30 Sept 2012 Avyakt Murlli ( Dual Voice )',
'post_story': 8,
'comment_count': 3,
'link': 'http:\\/\\/www.youtube.com\\/watch?v=VGmFj8g7JFA&feature=youtube_gdata_player',
'post_impressions': 307,
'created_time': '03:04 AM, Sep 30, 2012',
'message': 'Not available',
< built - in function id > : '529439300404155',
'status_type': 'video',
'likes_count': 7
} {
'post_engaged': 37,
'post_impressions': 447,
'post_story': 22,
'comment_count': 4,
'created_time': '03:11 AM, Sep 30, 2012',
'message': '30-09-12 \\u092a\\u094d\\u0930\\u093e\\u0924:\\u092e\\u0941\\u0930\\u0932\\u0940 \\u0913\\u0',
< built - in function id > : '471643246209744',
'status_type': 'status',
'likes_count': 20
} {
'post_engaged': 36,
'post_impressions': 423,
'post_story': 22,
'comment_count': 0,
'created_time': '03:04 AM, Sep 29, 2012',
'message': 'Essence: Sweet children, whenever you have time, earn the true income. Staying i',
< built - in function id > : '471274672913268',
'status_type': 'status',
'likes_count': 20
} {
'post_engaged': 16,
'text': 'Essence Of Murli 29-09-2012',
'post_story': 5,
'comment_count': 2,
'link': 'http:\\/\\/www.youtube.com\\/watch?v=i6OgmbRsJpg&feature=youtube_gdata_player',
'post_impressions': 291,
'created_time': '03:04 AM, Sep 29, 2012',
'message': 'Not available',
< built - in function id > : '213046588825668',
'status_type': 'video',
'likes_count': 5
}
But it leads me to
TypeError : keys must be a string
I guess the error might be popping because the dict contains, some elements like:
<built-in function id>: '213046588825668'
Can someone please guide me, with how should I remove these elements from the dict?
You could try to clean it up like this:
for key in mydict.keys():
if type(key) is not str:
try:
mydict[str(key)] = mydict[key]
except:
try:
mydict[repr(key)] = mydict[key]
except:
pass
del mydict[key]
This will try to convert any key that is not a string into a string. Any key that could not be converted into a string or represented as a string will be deleted.
Modifying the accepted answer above, I wrote a function to handle dictionaries of arbitrary depth:
def stringify_keys(d):
"""Convert a dict's keys to strings if they are not."""
for key in d.keys():
# check inner dict
if isinstance(d[key], dict):
value = stringify_keys(d[key])
else:
value = d[key]
# convert nonstring to string if needed
if not isinstance(key, str):
try:
d[str(key)] = value
except Exception:
try:
d[repr(key)] = value
except Exception:
raise
# delete old key
del d[key]
return d
Nolan conaway's answer gives this result for example
{"b'opening_hours'": {"b'1_from_hour'": 720, "b'1_to_hour'": 1440, "b'1_break_from_hour'": 1440, "b'1_break_to_hour'": 1440, "b'2_from_hour'": 720, "b'2_to_hour'": 1440, "b'2_break_from_hour'": 1440, "b'2_break_to_hour'": 1440, "b'3_from_hour'": 720, "b'3_to_hour'": 1440, "b'3_break_from_hour'": 1440, "b'3_break_to_hour'": 1440, "b'4_from_hour'": 720, "b'4_to_hour'": 1440, "b'4_break_from_hour'": 1440, "b'4_break_to_hour'": 1440, "b'5_from_hour'": 720, "b'5_to_hour'": 1440, "b'5_break_from_hour'": 1440, "b'5_break_to_hour'": 1440, "b'6_from_hour'": 720, "b'6_to_hour'": 1440, "b'6_break_from_hour'": 1440, "b'6_break_to_hour'": 1440, "b'7_from_hour'": 720, "b'7_to_hour'": 1440, "b'7_break_from_hour'": 1440, "b'7_break_to_hour'": 1440}}
while this amended version
import time import re import json from phpserialize import *
class Helpers:
def stringify_keys(self,d):
"""Convert a dict's keys to strings if they are not."""
for key in d.keys():
# check inner dict
if isinstance(d[key], dict):
value = Helpers().stringify_keys(d[key])
else:
value = d[key]
# convert nonstring to string if needed
if not isinstance(key, str):
try:
d[key.decode("utf-8")] = value
except Exception:
try:
d[repr(key)] = value
except Exception:
raise
# delete old key
del d[key]
return d
will give this cleaner version..
{"opening_hours": {"1_from_hour": 720, "1_to_hour": 1440, "1_break_from_hour": 1440, "1_break_to_hour": 1440, "2_from_hour": 720, "2_to_hour": 1440, "2_break_from_hour": 1440, "2_break_to_hour": 1440, "3_from_hour": 720, "3_to_hour": 1440, "3_break_from_hour": 1440, "3_break_to_hour": 1440, "4_from_hour": 720, "4_to_hour": 1440, "4_break_from_hour": 1440, "4_break_to_hour": 1440, "5_from_hour": 720, "5_to_hour": 1440, "5_break_from_hour": 1440, "5_break_to_hour": 1440, "6_from_hour": 720, "6_to_hour": 1440, "6_break_from_hour": 1440, "6_break_to_hour": 1440, "7_from_hour": 720, "7_to_hour": 1440, "7_break_from_hour": 1440, "7_break_to_hour": 1440}}
Ideally you would want to clean your data so you comply to the data types supported by JSON.
If you simply want to suppress/ or remove these elements from the dict while serializing, you can use skipkeys argument, description can be found in json.dump section
json.dumps(obj, skipkeys=True)
This solution is much cleaner and allows the standard library handle erroneous keys for you.
WARNING: You must fully understand the implications of using such a drastic method as this will result in data loss for non-compliant data types as JSON keys.
Maybe this will help the next guy:
strjson = json.dumps(str(dic).replace("'",'"'))
来源：https://stackoverflow.com/questions/12734517/json-dumping-a-dict-throws-typeerror-keys-must-be-a-string