python dict comprehension

Python prints Unicode in Dict to ChineseImport JSONA = {u ' content ': {u ' address_detail ': {u ' province ': U ' \u5409\u6797\u7701 ', U ' city ': U ' \u957f\u6625\u5e02 ', U ' street_ Number ': U ', u ' district ': U ', u ' street ': U ', U ' city_code ': +, U ' point ': {u ' y ': U ' 43.89833761 ', U ' x ': U ' 125.31364243 '} , U ' address ': U ' \u5409\u6797\u7701\u957f\u6625\u5e02 '}, U ' status ': 0

One, the string s = ' python ' s1 = ' python ' + ' learn ' #相加其实就是简单拼接s2 = ' python ' * aa multiplication is actually how many times you copy yourself, and then stitch together a string slice: a= ' abcdefg ' Print (a[0]) # Index The subscript is the string consisting of elements starting with the first, the initial index is 0 and so on. Print (a[0:]) #默认到最后print

The example of this article summarizes the common operation methods of Dict dictionary in Python. Share to everyone for your reference. Specifically as follows: The following Python code shows the common operation of the dictionary in Python, the dictionary plays a pivotal role in

If we need to get the dictionary value, we have two methods, one is through dict[' key ', and the other is the Dict.get () method.What we are sharing today is the dictionary's Get () method.Here we can use a dictionary to make a small game, assuming the user in the terminal input string: "1" or "2" or "3", return the corresponding content, if it is input other, then return "error"Some friends here may use if elif else judgment statement to operate, in

list conversionManual constructionUsing zipDictionary goto list:List (dic) = = Dict.keys ()Dict.keys () dict.values ()Dictionary transfer tuple:Tuple (DIC)--Contains only key valuesDictionary to string:STR (DIC)practice One: Put the string "K1:1|k2:2|k3:3" processed into python the form of a dictionary : {' K3 ': 3, ' K2 ': 2, ' K1 ': 1 string = "K1:1|k2:2|k3:3"dic={}Print String.Split ("|")For KV in String.Split ("|"): K,v =kv.spl

= {'Max': 1001,'Rachel': 20001,"Jim111": 14000}Print(salary['Max']) salary['Max'] = 2000Print(salary['Max'])Print(Salary.pop ('Jim','No Jim'))Print(Salary.get ('Rachel',-1))Print(Salary) value= []salary['Max'] =valuePrint(Salary)#4set-only key, no Value,set,dict key does not allow mutable objects, such as list, can only be string or integer these invariant objectsSet1 = Set ([All]) Set2= Set ([2, 3,'a']) Set1.add (4) Set1.remove (2) s=set (['SDF', 3]

The basic method of a list of Python, which goes on to say dict,tuple.One, tuple, tuple1, the definition of the tupleOr:2. Use slices to access elements in tuplesDetailed reference to the slice usage of list3, the tuple is not modifiable, is immutable variable4. Accessing elements in tuplesSecond, the use of the dictionary1. Dictionary definition2, the query operation of the dictionary3. Add a dictionary el

Common Dict Operations:d={'name':'Suki', ' Age':' -', 'Sex':'Mans', 'Addr':'Nanjing' }#dictionary values are convenient, but dictionaries are not sequential, List has subscriptPrint(d['name'])#non-existent key will errorPrint(D.get ('name'))#non-existent key returns none#add keyd['Height']=175D.setdefault ('Weight','Wuyi')#Modifyd['Height']=175D.setdefault ('Weight', 51)#DeleteD.pop ('Weight') D.popitem ()#randomly delete a keydeld['Height']d.c

Python extracts dict and converts it to xml/json/table, and outputs the implementation code, dictjson Core code: #! /Usr/bin/python #-*-coding: gbk-*-# Set the source file output format import sysimport getoptimport jsonimport createDictimport myConToXMLimport myConToTable def getRsDataToDict (): # obtain the input parameters in the console and find the source da

Python uses the list or dict field mode to read files, Preface Python is a powerful tool for processing text data. It is extremely simple to read, split, filter, and convert, so developers do not need to consider complicated stream file processing processes (compared with JAVA, hey ). Some complex text data processing and computing tasks, including writing Stream

# # Python has four kinds of sequences for storing data--list, tuple, dict, set# # List-an ordered sequence of data of any type can be stored-a list can consist of 0 or more elements, separated by commas, and the entire list wrapped in square brackets:-Create-Create a list using [] or list ()-New_list = ["Stanley", "Loves", "Lily"]-Access and modification-use list name [index] to access and modify list elem

Disclaimer: Transfer from CSDN (http://blog.csdn.net/csujiangyu/article/details/45176399)1. Create an empty dictionary>>> dic = {}>>> type (DIC)'dict'>2. Direct Assignment creation>>> dic = {'spam'egg'bar' : 3}>>> dic{'bar'egg ' ' spam ': 1}3. Create by keyword dict and keyword parameters>>> dic = dict (spam = 1, egg = 2, bar =3)>>> dic{'bar' 'egg''spam': 1}4. C

Part of the Source: http://blog.sina.com.cn/s/blog_5c6760940100bmg5.html① Direct Assignment----result is a reference to a different nameThe modification of the new dictionary has a full effect on the original dictionary, just a reference to the relationship>>> C = {'a': 1,'b': 2}>>> d =C>>> d['e']=3>>>d{'a': 1,'b': 2,'e': 3}>>>c{'a': 1,'b': 2,'e': 3}>>> f =dict ()>>> f =D>>> f["k"]=4>>>f{'a': 1,'k': 4,'b': 2,'e': 3}>>>c{'a': 1,'k': 4,'b': 2,'e': 3}② u