In Python, the json module provides an API similar to convert in-memory Python objects to a serialized representation known as JavaScript Object Notation (JSON) and vice-a-versa.
json.dump(obj, fp,
skipkeys=False,
ensure_ascii=True,
check_circular=True,
allow_nan=True,
cls=None,
indent=None,
separators=None,
default=None,
sort_keys=False, **kw)The above method serialize obj as a JSON formatted stream to fp (a .write()-supporting file-like object) using the following conversion table.
Python JSON
dict object
list, tuple array
str string
int, float, int- & float-derived Enums number
True true
False false
None nullimport json
student = {"101":{"class":'V', "Name":'Rohit', "Roll_no":7},
"102":{"class":'V', "Name":'David', "Roll_no":8},
"103":{"class":'V', "Name":'Samiya', "Roll_no":12}}
print(json.dumps(student));Output:
{"103": {"class": "V", "Name": "Samiya", "Roll_no": 12},
"102": {"class": "V", "Name": "David", "Roll_no": 8},
"101": {"class": "V", "Name": "Rohit", "Roll_no": 7}}import json
student = {"101":{"class":'V', "Name":'Rohit', "Roll_no":7},
"102":{"class":'V', "Name":'David', "Roll_no":8},
"103":{"class":'V', "Name":'Samiya', "Roll_no":12}}
print(json.dumps(student, sort_keys=True));Ooutput:
{"101": {"Name": "Rohit", "Roll_no": 7, "class": "V"},
"102": {"Name": "David", "Roll_no": 8, "class": "V"},
"103": {"Name": "Samiya", "Roll_no": 12, "class": "V"}}import json
tup1 = 'Red', 'Black', 'White';
print(json.dumps(tup1));Output:
["Red", "Black", "White"]import json
list1 = [5, 12, 13, 14];
print(json.dumps(list1));Output:
[5, 12, 13, 14]import json
string1 = 'Python and JSON';
print(json.dumps(string1));Output:
"Python and JSON"import json
x = -456;
y = -1.406;
z = 2.12e-10
print(json.dumps(x));
print(json.dumps(y));
print(json.dumps(z));Output:
-456
-1.406
2.12e-10Basic usage:
json.load(fp,
cls=None,
object_hook=None,
parse_float=None,
parse_int=None,
parse_constant=None,
object_pairs_hook=None, **kw)JSON Python
object dict
array list
string str
number (int) int
number (real) float
true True
false False
null Noneimport json
json_data = '{"103": {"class": "V", "Name": "Samiya", "Roll_n": 12}, "102": {"class": "V", "Name": "David", "Roll_no": 8}, "101": {"class": "V", "Name": "Rohit", "Roll_no": 7}}';
print(json.loads(json_data));Output:
{"103": {"class": "V", "Name": "Samiya", "Roll_no": 12},
"102": {"class": "V", "Name": "David", "Roll_no": 8},
"101": {"class": "V", "Name": "Rohit", "Roll_no": 7}}import json
list1 = '[ "Ford", "BMW", "Fiat" ]'
print(json.loads(list1));import json
Json_string = "Python and JSON"
print(json.dumps(Json_string));Output:
"Python and JSON"{
"data": {
"sessionMaterial": {
"id": "session-material:2018/tieto:databasis-json-yaml:2",
"title": "JSON",
"html": "\n \n \n\n <h2>JSON</h2>\n<p>In Python, the json module provides an API similar to convert in-memory Python objects to a serialized representation known as JavaScript Object Notation (JSON) and vice-a-versa.</p>\n<h3>Encode Python objects as JSON strings</h3>\n<div class=\"highlight\"><pre><code>json.dump(obj, fp,\n skipkeys=False,\n ensure_ascii=True,\n check_circular=True,\n allow_nan=True,\n cls=None,\n indent=None,\n separators=None,\n default=None,\n sort_keys=False, **kw)</code></pre></div><p>The above method serialize obj as a JSON formatted stream to fp (a .write()-supporting file-like object) using the following conversion table.</p>\n<div class=\"highlight\"><pre><code>Python JSON\ndict object\nlist, tuple array\nstr string\nint, float, int- & float-derived Enums number\nTrue true\nFalse false\nNone null</code></pre></div><h3>Python Dictionaries to JSON strings</h3>\n<div class=\"highlight\"><pre><code>import json\nstudent = {"101":{"class":'V', "Name":'Rohit', "Roll_no":7},\n "102":{"class":'V', "Name":'David', "Roll_no":8},\n "103":{"class":'V', "Name":'Samiya', "Roll_no":12}}\nprint(json.dumps(student));</code></pre></div><p>Output:</p>\n<div class=\"highlight\"><pre><code>{"103": {"class": "V", "Name": "Samiya", "Roll_no": 12}, \n"102": {"class": "V", "Name": "David", "Roll_no": 8}, \n"101": {"class": "V", "Name": "Rohit", "Roll_no": 7}}</code></pre></div><h3>Python Dictionaries to JSON strings (sorted by key)</h3>\n<div class=\"highlight\"><pre><code>import json\nstudent = {"101":{"class":'V', "Name":'Rohit', "Roll_no":7},\n "102":{"class":'V', "Name":'David', "Roll_no":8},\n "103":{"class":'V', "Name":'Samiya', "Roll_no":12}}\nprint(json.dumps(student, sort_keys=True));</code></pre></div><p>Ooutput:</p>\n<div class=\"highlight\"><pre><code>{"101": {"Name": "Rohit", "Roll_no": 7, "class": "V"}, \n"102": {"Name": "David", "Roll_no": 8, "class": "V"}, \n"103": {"Name": "Samiya", "Roll_no": 12, "class": "V"}}</code></pre></div><h3>Python tuple to JSON array</h3>\n<div class=\"highlight\"><pre><code>import json\ntup1 = 'Red', 'Black', 'White';\nprint(json.dumps(tup1));</code></pre></div><p>Output:</p>\n<div class=\"highlight\"><pre><code>["Red", "Black", "White"]</code></pre></div><h3>Python list to JSON array</h3>\n<div class=\"highlight\"><pre><code>import json\nlist1 = [5, 12, 13, 14];\nprint(json.dumps(list1));</code></pre></div><p>Output:</p>\n<div class=\"highlight\"><pre><code>[5, 12, 13, 14]</code></pre></div><h3>Python string to JSON string</h3>\n<div class=\"highlight\"><pre><code>import json\nstring1 = 'Python and JSON';\nprint(json.dumps(string1));</code></pre></div><p>Output:</p>\n<div class=\"highlight\"><pre><code>"Python and JSON"</code></pre></div><h3>Python int, float, int- & float-derived Enums to JSON number</h3>\n<div class=\"highlight\"><pre><code>import json\nx = -456;\ny = -1.406;\nz = 2.12e-10\nprint(json.dumps(x));\nprint(json.dumps(y));\nprint(json.dumps(z));</code></pre></div><p>Output:</p>\n<div class=\"highlight\"><pre><code>-456\n-1.406\n2.12e-10</code></pre></div><h3>Decode JSON strings into Python objects</h3>\n<p>Basic usage:</p>\n<div class=\"highlight\"><pre><code>json.load(fp, \n cls=None, \n object_hook=None, \n parse_float=None, \n parse_int=None, \n parse_constant=None, \n object_pairs_hook=None, **kw)</code></pre></div><div class=\"highlight\"><pre><code>JSON Python\nobject dict\narray list\nstring str\nnumber (int) int\nnumber (real) float\ntrue True\nfalse False\nnull None</code></pre></div><h3>JSON strings to Python Dictionaries</h3>\n<div class=\"highlight\"><pre><code>import json\njson_data = '{"103": {"class": "V", "Name": "Samiya", "Roll_n": 12}, "102": {"class": "V", "Name": "David", "Roll_no": 8}, "101": {"class": "V", "Name": "Rohit", "Roll_no": 7}}';\nprint(json.loads(json_data));</code></pre></div><p>Output:</p>\n<div class=\"highlight\"><pre><code>{"103": {"class": "V", "Name": "Samiya", "Roll_no": 12}, \n"102": {"class": "V", "Name": "David", "Roll_no": 8}, \n"101": {"class": "V", "Name": "Rohit", "Roll_no": 7}}</code></pre></div><h3>Python list to JSON array</h3>\n<div class=\"highlight\"><pre><code>import json\nlist1 = '[ "Ford", "BMW", "Fiat" ]'\nprint(json.loads(list1));</code></pre></div><h3>JSON string to Python string</h3>\n<div class=\"highlight\"><pre><code>import json \nJson_string = "Python and JSON" \nprint(json.dumps(Json_string));</code></pre></div><p>Output:</p>\n<div class=\"highlight\"><pre><code>"Python and JSON"</code></pre></div>\n\n\n "
}
}
}