json.dumps() to get json output by using python objects

dumps(obj,indent=None, separators=None,skipkeys=False,sort_keys=False, 
	ensure_ascii=True, check_circular=True, allow_nan=True, 
	cls=None, encoding="utf-8", default=None )

obj : Required, The input python objecct. The list of objects can be used is given below
indent : (optional ) None (Default) , an indent level.
separators : ( optional ) ',' is default, we can use our own
sort_keys : ( optional ) False ( Default ) sorting by keys if set to True
ensure_ascii : (Optional ) True ( Default ) All non ASCII char are escaped check_circular:(Optional ) True ( Default ) Check for circular reference if False
allow_nan : (Optional ) True ( Default ) Error will generate for out of range float values if False

Converting List to Json

import json
my_list=['Alex','Ronald','John']
print(my_list) # ['Alex', 'Ronald', 'John']
j=json.dumps(my_list)
print(j)   # ["Alex", "Ronald", "John"]

List with Boolean value and None type

import json
my_list=[True, False, True,None]
print(my_list) # [True, False, True, None]
j=json.dumps(my_list)
print(j) # [true, false, true, null]

Using a tuple

import json
my_tuple=('Alex','Ronald','John')
print(my_tuple) # ('Alex', 'Ronald', 'John')
j=json.dumps(my_tuple)
print(j) # ["Alex", "Ronald", "John"]

Using Dictionary

import json
my_dict={1:'Alex',2:'Ronald'}
print(my_dict) # {1: 'Alex', 2: 'Ronald'}
j=json.dumps(my_dict)
print(j) # {"1": "Alex", "2": "Ronald"}

We can't use set , it will generate TypeError

We will use other python objects

import json
print(json.dumps(22)) # 22
print(json.dumps(22.34)) # 22.34
print(json.dumps(True))  # true
print(json.dumps(False)) # false
print(json.dumps(None))  # null

Using optional parameters separators and sort_keys

import json
my_dict={3:'Ronn',1:'Alex',2:'Ronald'}
print(my_dict) # {3: 'Ronn', 1: 'Alex', 2: 'Ronald'}
j=json.dumps(my_dict,separators=(';',':'),sort_keys=True)
print(j) # {"1":"Alex";"2":"Ronald";"3":"Ronn"}

Using indent

import json
my_dict={3:'Ronn',1:'Alex',2:'Ronald'}
print(my_dict) # {3: 'Ronn', 1: 'Alex', 2: 'Ronald'}
j=json.dumps(my_dict,indent=3)
print(j)

Output

{3: 'Ronn', 1: 'Alex', 2: 'Ronald'}
{
   "3": "Ronn",
   "1": "Alex",
   "2": "Ronald"
}

Json & Python dump() to write Json data to file Python- Tutorials

Subhendu Mohapatra

Author & Instructor at plus2net

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