python dictionary of dictionaries

updatePrint(INFO1) C= Info1.fromkeys ([6,7,8],[1,{'name':'Robin'},444])#Initialize a new dictionary if only one layer is OK. If there are multiple layers, a shared memory address problem occurs. One has changed, the others have changed. Print(c) c[7][1]['name'] ='Jack'Print(c)Print(Info1.items ())#turn the dictionary into a listMulti-level dictionary nesting and

more popular, that is, the key value must be a string, otherwise it will be an errorDict1=dict (name="Alex", gender="Sex") Dict1=dict (1,"cc"),(" Age"," +")) Dict1=dict.fromkeys (['Height','Weight'],'Normal')Three. List method four. Tuple method Five. Dictionary method six. Summary1. Do not think that learning a programming language is the Light Learning code, more practice code can be, it is necessary to understand its concept, to buckle the concept

original list 10 List.clear ()Clear List 11 List.copy ()Copy List Four. Yuan zuA Python tuple is similar to a list, except that the elements of a tuple cannot be modified.Tuples use parentheses, and the list uses square brackets.T1 = (1,) # Ganso of a single element t2 = () # empty Progenitor　　Five. DictionariesBuilt-in functions for dictionaries:

() Determines whether a string ends a string with a string: The Split () string is converted to a list ("A delimiter needs to be defined in parentheses") join () convert list to string "format: x=" | ". Join (list) format string: Format () {} Replace with placeholder {index} Replace with the specified index {name} is replaced by the specified name for example: My name is {} ' age is {} '. Format (parameter 1. ..., parameter n) print ("My name is%s-age is%s"% ("Yyh", "+")) print ("My name is {na

There is no switch syntax in Python, and I want to use a switch-like feature in my practice, and search for the relevant content knowing that using a dictionary can do the steps I want. So, start.I'm using Python3, and I'm practicing using the Tkinter module to write a little game: Table tennis. In the test phase, I first typed: from Import *This loads the Tkinter module and uses * to make a little bit of c

square of [0-10] is obtained:Python code [X**2 for x in Range (Ten)] DictionaryThe dictionary in Python is like the Java HashMap, which exists and operates in the form of key-value pairs, with the following characteristics: Access by key, not offset; Key-value pairs are unordered; The keys and values can be arbitrary objects; Variable length, arbitrary nesting; In t

that contains all the key, the values () method, returns a list that contains all the values in the dictionary, items (), and returns a containing all (key, value) elements a list of groups. These methods are useful when you are not traversing the keys or values of a dictionary in any order. The keys () method is useful for returning a list that contains all the keys in the

In this article, we'll look at the dictionaries in Python, and in this article I'll explain what the Python dictionary is . and explain how the python dictionary is used . Well, don't say much nonsense, let's get into the articl

The differences between tuples, lists, and dictionaries in PythonIn Python, there are 3 built-in data structures: lists, tuples, and dictionaries.The list symbol is the [] bracketTuples are () bracketThe dictionary is {} curly braces1. ListA list is a data structure that handles a set of ordered items , that is, you can store a sequence of items in a list. Items

This article shares the introduction of Python Tuples (tuple), lists, and dictionaries (dict ). Tuple ): Tuples are commonly represented by parentheses (). The elements are identified by commas. 1 # define a tuple 2 3 # tuple = 'a', 4 5 tuple = ('A', 'B', 'C', 'D', 'e ', 'F', 'g') 6 7 # In general, after defining a tuples, you cannot add or modify the elements of the tuples, however, you can add elements

','Yuan')>>> Name[:2]('Egon','Alex')>>> name[2:] ('Seven','Yuan')>>>name[:] ('Egon','Alex','Seven','Yuan')Inclusions, lengths, and loops>>> ages = (one, one, one, one, one) in ages # contains True in Agesfalse not inch agesfalse>>> Len (ages) # length for in ages: # Loop ... Print (age) ... 1122334455 II. basic Data Type--dictionary A dict