Use the json module to produce JSON output:
import json
with open(outputfilename, 'wb') as outfile:
json.dump(row, outfile)
This writes the JSON result directly to the file (replacing any previous content if the file already existed).
If you need the JSON result string in Python itself, use json.dumps() (added s, for 'string'):
json_string = json.dumps(row)
The L is just Python syntax for a long integer value; the json library knows how to handle those values, no L will be written.
Demo string output:
>>> import json
>>> row = [1L,[0.1,0.2],[[1234L,1],[134L,2]]]
>>> json.dumps(row)
'[1, [0.1, 0.2], [[1234, 1], [134, 2]]]'
Use the json module to produce JSON output:
import json
with open(outputfilename, 'wb') as outfile:
json.dump(row, outfile)
This writes the JSON result directly to the file (replacing any previous content if the file already existed).
If you need the JSON result string in Python itself, use json.dumps() (added s, for 'string'):
json_string = json.dumps(row)
The L is just Python syntax for a long integer value; the json library knows how to handle those values, no L will be written.
Demo string output:
>>> import json
>>> row = [1L,[0.1,0.2],[[1234L,1],[134L,2]]]
>>> json.dumps(row)
'[1, [0.1, 0.2], [[1234, 1], [134, 2]]]'
import json
row = [1L,[0.1,0.2],[[1234L,1],[134L,2]]]
row_json = json.dumps(row)
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You can achieve this by using built-in json module
import json
arrayJson = json.dumps([{"email": item} for item in pyList])
Try to Google this kind of stuff first. :)
import json
array = [1, 2, 3]
jsonArray = json.dumps(array)
By the way, the result you asked for can not be achieved with the list you provided.
You need to use python dictionaries to get json objects. The conversion is like below
Python -> JSON
list -> array
dictionary -> object
And here is the link to the docs https://docs.python.org/3/library/json.html
import json
array = '{"fruits": ["apple", "banana", "orange"]}'
data = json.loads(array)
print(data['fruits'])
# the print displays:
# ['apple', 'banana', 'orange']
You had everything you needed. data will be a dict, and data['fruits'] will be a list
Tested on Ideone.
import json
array = '{"fruits": ["apple", "banana", "orange"]}'
data = json.loads(array)
fruits_list = data['fruits']
print fruits_list
I know that, list can be converted into JSON by using json.dumps(mylist).
But how can I convert something like this into JSON ?
[["abc", "bcd", "cde"] , ["pgr", "xyz"]]
decode JSON strings into dicts and put them in a list, last, convert the list to JSON
json_list = []
json_list.append(json.loads(JSON_STRING))
json.dumps(json_list)
or more pythonic syntax
output_list = json.dumps([json.loads(JSON_STRING) for JSON_STRING in JSON_STRING_LIST])
Use json.dumps before json.loads to convert your data to dictionary object This also helps prevent valueError: Expecting property name enclosed in double quotes.
Ex:
import json
myJSONStringList = ['{"user": "testuser", "data": {"version": 1, "timestamp": "2018-04-03T09:23:43.388Z"}, "group": "33"}',
'{"user": "otheruser", "data": {"version": 2, "timestamp": "2018-04-03T09:23:43.360Z", }, "group": "44"}']
print([json.loads(json.dumps(i)) for i in myJSONStringList])
Output:
[u'{"user": "testuser", "data": {"version": 1, "timestamp": "2018-04-03T09:23:43.388Z"}, "group": "33"}', u'{"user": "otheruser", "data": {"version": 2, "timestamp": "2018-04-03T09:23:43.360Z", }, "group": "44"}']
Just adding onto alexce's response, you can easily convert the restructured data into JSON:
import json
json.dumps(result)
There are some potential security concerns with top-level arrays. I'm not sure if they're still valid with modern browsers, but you may want to consider wrapping it in an object.
import json
json.dumps({'results': result})
To solve this, you need to split the input list into chunks, by 7 in your case. For this, let's use this approach. Then, use a list comprehension producing a list of dictionaries:
>>> from pprint import pprint
>>> l = [['String 1'],['String 2'],['String 3'],['String 4'],['String 5'],
... ['String 6'],['String 7'],['String 8'],['String 9'],['String 10'],
... ['String 11']]
>>> def chunks(l, n):
... """Yield successive n-sized chunks from l."""
... for i in range(0, len(l), n):
... yield l[i:i+n]
...
>>>
>>> result = [{"title%d" % (i+1): chunk[i][0] for i in range(len(chunk))}
for chunk in chunks(l, 7)]
>>> pprint(result)
[{'title1': 'String 1',
'title2': 'String 2',
'title3': 'String 3',
'title4': 'String 4',
'title5': 'String 5',
'title6': 'String 6',
'title7': 'String 7'},
{'title1': 'String 8',
'title2': 'String 9',
'title3': 'String 10',
'title4': 'String 11'}]
You are adding the exact same dictionary to the list. You should create a new dictionary for each item in the list:
json.dumps([dict(mpn=pn) for pn in lst])
As explained by others (in answers) you should create a new dictionary for each item on the list elsewhere you reference always the same dictionary
import json
part_nums = ['ECA-1EHG102','CL05B103KB5NNNC','CC0402KRX5R8BB104']
def json_list(list):
lst = []
for pn in list:
d = {}
d['mpn']=pn
lst.append(d)
return json.dumps(lst)
print json_list(part_nums)
[{"mpn": "ECA-1EHG102"}, {"mpn": "CL05B103KB5NNNC"}, {"mpn": "CC0402KRX5R8BB104"}]