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Null
JSON decodes the corresponding table for the Python type conversion:
JSON
Python
Object
Dict
Array
List
String
Str
Number (int)
Int
Number (real)
Float
Example of implementing JSON deserialization Class Object in Python, json serialization
Our network protocol is generally to convert data into JSON before transmission. Previously, serialization and deserialization were implemented in Java, both jackson and fastjson are very
# Reference: the python standard library by example
12.9 JSON Module
JSON is JavaScript Object Notation. This module converts Python objects and JSON strings. Applicable to Python version 2.6 and later.The
indent, the printed json data is also called pretty-printed json.
Separators: delimiter, which is actually a tuple of (item_separator, dict_separator). The default value is (',', ':'). This indicates that keys in a dictionary are separated by commas, the KEY and value are separated.
Encoding: the default is UTF-8, which sets the encoding method for json data.
So
Method 1:Read the JSON string in the file,Then use Json.loads to convert to Python dictionaryImport Jsonstr_file = './960x540/config.json ' with open (Str_file, ' R ') as F: print ("Load str file from {}". Format (str_ file)) str1 = F.read () r = json.loads (str1) print (Type (r)) print (r) print (r[' under_game_score_y ']) Method 2:Directly with the fi
stores the Dict object, and other types can cause the TypeError exception to be created and gracefully filter the illegal keys if the Skipkeys is set to true.
data = {' B ': 789, ' C ': 456, (1,2): 123}
print ' original data: ', repr (data)
print ' JSON encoded ', json.dumps (data, Skipkeys=true)
Output:
Original data: {(1, 2): 123, ' C ': 456, ' B ': 789}
JSON encoded {"C": 456, "
delimiter, which is actually a tuple (item_separator, Dict_separator), is the default (', ', ': '), which means that there is a "," separation between keys in dictionary, The key and value are separated by ":".encoding: The default is UTF-8, which sets how JSON data is encoded.Sort_keys: Sorts the data according to the value of keys.The decode process is a process of converting a JSON object into a
be a non-negative integer. if it is 0 or empty, the data is displayed in one row. Otherwise, the line breaks and the front blank is displayed according to the number of indent, the printed json data is also called pretty-printed json.
Separators: delimiter, which is actually a tuple of (item_separator, dict_separator). The default value is (',', ':'). This indicates that keys in a dictionary are separated
This article describes how to write a Python script to convert a sqlAlchemy object to dict. It mainly builds a conversion method based on the Python model class, if you want to write a web application using sqlAlchemy, you may often use json for communication. dict is the closest object to
Skipkeys, which defaults to false. The Dumps method stores Dict objects when key must be of type STR, other types cause typeerror exceptions, and if the Skipkeys is set to true the illegal keys are filtered gracefully.
data = {' B ': 789, ' C ': 456, (): 123} print ' original data: ', repr (data) print ' JSON encoded ', Json.dumps (data,skipkeys= True)
Output:
Original data: {(1, 2): 123, ' C ': 456, ' B ': 789}
, which is actually a tuple (item_separator, Dict_separator), is the default (', ', ': '), which means that there is a "," separation between keys in dictionary, The key and value are separated by ":".
encoding: The default is UTF-8, which sets how JSON data is encoded.
Sort_keys: Sorts the data according to the value of keys.
The decode process is a process of converting a JSON object into a
Please convert this php code into python code. thank you! {Code...} is simply to sort the array in reverse order and convert it to json format. Please convert this php code into python code. thank you!
// Inverted sorting functio
' % (self.name,self.age)if __name__ == '__main__': p = Person('Peter',22) print p
If you directly process the Person instance using the json. dumps method, an error is returned because json cannot support automatic conversion. Through the json and python type conversion table mentioned above, we can find that the objec
is ["Python", "javascript", "C++", ...] , the value is the same as in all languages, using index get, the type of field value can be number, string, array, object several.
1. Import JSONThe JSON module provides four functions:,,, dumps dump loads load for converting between string and Python data types.1.1, Json.loads ()
This article mainly introduces the Chinese problem of python processing json data. if you need it, you can refer to the python module that handles python. you can directly import json when using it. You can use the loads method to conver
bar (), but now have to change to use_logging (bar). So is there a better way? Of course, the answer is an adorner.1. Non-parametric adornerImport TimedefTimer (func):defdeco (): Start_time=time.time () func () Stop_time=time.time ()Print("The func run time is%s"% (stop_time-start_time)) returnDeco@timer#equivalent to Time1=timer (time1)deftime1 (): Time.sleep (1) Print(" in the time") time1 ()" "In the timethe func run time is 1.0000569820404053" "2. Parametric decoratorImport TimedefTimer
from:http://blog.csdn.net/jlnuboy/article/details/5732196
Pymotw:json Module: JSON purpose: JavaScript Object Format Serializer Python version: 2.6
The JSON module provides an API interface similar to that used in pickle to convert a Python object in memory to a sequence re
Serialization related 1. Json
Application Scenarios:
The JSON module is primarily used to process data in JSON format, can convert JSON-formatted data into a Python dictionary, facilitates
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