python foundation udacity

'] = Stu_data5.shutil Module1 ImportShutil2 3 #f1 = open ("random mod. Py")4 #F2 = open ("random_new. py", ' W ')5 #shutil.copyfileobj (f1,f2)6 7 #shutil.copyfile ("notes", R ' d:\123 ')8Shutil.make_archive ('www','Gztar', Root_dir=r'C:\Users\heshaochuan\PycharmProjects\py_s15\day6')6. Logging Module1 ImportLogging2 3Log_test = Logging.getlogger ('TEST')4Logging.basicconfig (filename='Wwwwwwwwww.log', level=Logging.info)5Logging.debug ('Mthgh')6Logging.info ('2131234324')7.re ModuleCommon Regula

)## #shan# Names.remove (' F ')# Print (names)## del Names[1]# Print (names)## Names.pop (3)# Print (names)### #gai# Names[2] = ' k '# Print (names)## #cha# print (Names[-2])# print (Names[0::2])# print (names[-3:])## Print (Names.index (' s '))#First_index = Names.index (' a ')Second_index = Names[first_index + 1:].index (' B ')Print (' second ', second_index+first_index+1)Print (' Count ', Names.count (' B '))N2 = [' 5 ']Names.extend (N2)Names.reverse ()Names.sort ()Print (names)N3 = Names.cop

clay figurine to blow the tone will become a person! ")#create_people ()defWater (FN):definner ():Print("watering first .") fn ()Print("Fertilization") returnInner#func = water (create_people)#func ()Create_people = Water (create_people)#function names, like variable names, can be assigned to other variablesCreate_people ()Version with a syntactic sugar@waterdefcreate_people ():Print("Nu wa is very powerful, pinch a clay figurine to blow the tone will become a person! ")#create_people ()defW

Python Foundation OneFirst, Python historyThe founder of Python is Guido van Rossum (Guido van Rossum). 1989 Christmas period, Guido van Rossum (Chinese name: Uncle Turtle) in order to pass time in Amsterdam, determined to develop a new script interpreter, as an inheritance of the ABC language.(Uncle Tortoise: 2005 joi

) print (dic[' name ') dic={' name ': ' Yanglei ', ' Age ': 23}json.dump (' Dic,open (' B.json ', ' W ')) Print (Json.load (open (' B.json ', ' r ')) [' name ']) with open (' C.json ', ' R ') as F: Data=f.read () #[ null,true,false,1] eval (data)(2) PickleValid only for Python#!/usr/binl/env python#encoding:utf-8#author:yangleiimport pickledic={' name ': ' Yanglei ', ' Age ': 23}print ( Pickle.d

English and European languages; it can only be represented by a maximum of 8 bits (one byte), that is: 2**8 = 256, so the ASCII code can represent up to 256 symbols. Unicode code: Also known as the Universal Code, the purpose is to solve the limitations of the traditional character encoding scheme, which sets a uniform and unique binary encoding for each character in each language, which specifies that although some characters and symbols are represented by at least 16 bits (2 bytes), tha

tuples.To define a tuple:A = (' 1 ', ' 2 ', ' 3 ', [' s ', ' B '])To change the elements of a list in a tuple:A[3][0] = ABCValue:Print (A[0])Cycle:t = (' A ', 1, ' B ', 1, (3,4))n = 0While n Print (T[n])n + = 1For I in range (len (t)):Print (T[i])Common operations for tuples:Count:t = (' A ', 1, ' B ', 1, (3,4))Print (T.count (1))D:\Python\Python36-32\python.exe e:/python/123. py2Process finished with exit

Three:If condition 1:Results 1Elif Condition 2:Results 2........ElseResult NFor examplemonth = input ("Please enter a month")ifmonth = ='January': Print("Eat Bananas")elifmonth = ='February': Print("Eat apples")elifmonth = ='March': Print("Eat Cake")elifmonth = ='April': Print("Eat Grapes")..........Else: Print("What do you want to eat?")4. Statement four--nestingIf condition 1:Results 1If condition 2:Results 2ElseResults 3ElseResults 4Print("crashed crashed crashed, who?") Gende

, namely:Import Getpass # Assigns user input to the name variable pwd = getpass.getpass ("Please enter password:") # Print the input contents of the printer (PWD)Python basic syntaxAn expression if: ElseName = input ("Please enter user name")PWD = Int (input ("Please enter password"))If name = = "Chendz" and pwd = = 123: Print ("Login Successful")elif name = = "or pwd = =" ": Print ("User name and password cannot be an empty string")Else Pr

)Print(b)Print("********************") A= {'a':'python','b':'Ruby','C':'Java'}b=A.popitem ()Print(a)Print(b) a= {'a':'python','b':'Ruby','C':'Java'}delA#the entire dictionary is deletedPrint('Other Dictionary methods') A= {' First':'python'}b= Dict.fromkeys (['a','b'],['Test'])Print(a)Print(b)Print('the traversal of a dictionary') A= {'a':'

;>> a=1 >>> ID (a) 1379185728 >>> b=1 >>> ID (b) 1379185728 variable occupied memory space comparison Small, no longer open up memory space, will be directly referenced, if the memory occupied by large, that the process of referencing will open up new memory space, which is a python optimization mechanism copy code >>> a= "abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz ">>> ID (a) 2884867588

no longer run on Py3. to take care of the earlier version, roll out the transition version 2.6 -- Basic use of Python 2.x syntax and libraries , taking into account the migration to Python 3.0, allowing the use of some of the Python 3.0 syntax and functions. the release of compatible version 2.7 has continued , A large number of Python3 features have been reve

indentation, and empty lines are not part of the Python syntax. When you write without inserting a blank line, the Python interpreter runs without errors. However, the purpose of a blank line is to separate the code of two different functions or meanings, which facilitates the maintenance or refactoring of future code.Show multiple statements on the same linePython can use multiple statements in the same r

, not a program to be executed, auxiliary instructions# This is the first one-line comment print ("Hello python")To ensure the readability of your code, it is recommended that you add a space before you write the appropriate explanatory textAdd a single line comment after the code In program development, you can use # to add descriptive text behind (next to) the code However, it is important to note that there are at least two spaces betw

1 )2 >>> a,rest,b3 (0, [1, 2, 3], 4)4 　　Pythonthe pros and consSee the pros first Python's positioning is "elegant", "clear", "simple", so the Python program looks always easy to understand, beginners learn python, not only easy to get started, but also in the future, you can write those very very complex programs. Development efficiency is very high, Pytho