anaconda python 3 6

string, if beg and end specify a range, the check is included in the range, or returns 1 if the index value is returned. String.index (str, beg = 0, end = Len (string)) is the same as the Find method only if Str does not report an exception in string String.isalnum () returns True if the string has at least one character and all characters are letters or numbers, otherwise false String.isalpha () returns True if the string has at least one character and all characters are letters, otherwise fal

#add deleter for attribute score@score. Deleterdefscore (self):Print('You delete the score!') delSELF._SCORESTU1=Student ()Print('-'* 50) Stu1.score= 88Print('-'* 50)Print(Stu1.score)Print('-'* 50) Stu1.score= 92Print(Stu1.score)delStu1.scoreExecution Result: --------------------------------------------------youset the score! --------------------------------------------------youget the score! --------------------------------------------------youset the score!you get the score! Delete the

Mappings : Relationship of key-value pairs, key (key) mapping values (value)The dictionary is the only type of mapping for Python>>> Phonebook = {'Wakey':'1111','Ethon':'2222','Joho':'3333'}>>>phonebook{'Joho':'3333','Wakey':'1111','Ethon':'2222'}Extension: the difference between a mapping type and a sequence type1, Access way, sequence type with a numeric type of key, and the mapping type can be used other object type key (General string)>>> lis = ['

' 010000006162cdcc2c40 'Unpacking Result: (1B' AB ',2.700000047683716) format character: b' forLittle-Endian occupied bytes:TenPackage Result: b' 010000006162cdcc2c40 'Unpacking Result: (1B' AB ',2.700000047683716) format character: b' > I 2s f ' forBig-Endian occupied bytes:TenPackage Result: b' 000000016162402CCCCD 'Unpacking Result: (1B' AB ',2.700000047683716) format character: b'! I 2s f ' forNetwork Consumption bytes:TenPackage Result: b' 000000016162402CCCCD 'Unpacking Result: (1B' AB

Python growth path Article 3 (2) _ regular expressions, the path to python GrowthAdd an advertisement. Welcome to linux. python Resource Sharing Group No.: 478616847. directory: 1. What is a regular expression? introduction to regular expressions in python2. re Module Content3. Small exercises1. What is a regular expre

main ways to access web pages using Python: urllib, urllib2, httplibUrllib is relatively simple and has relatively weak functions. httplib is simple and powerful, but does not seem to support session(1) simplest page accessRes = urllib2.urlopen (url)Print res. read ()(2) Add the data to get or postData = {"name": "hank", "passwd": "hjz "}Urllib2.urlopen (url, urllib. urlencode (data ))(3) add an http Heade

Python crawler (6) Principles of Scrapy framework, pythonscrapyScrapy framework About Scrapy Scrapy is an application framework written with pure Python to crawl website data and extract structural data. It is widely used. With the strength of the Framework, users can easily implement a crawler by customizing and developing several modules to capture webpage c

defined as a dictionary form)NOTE: * and * * can both "pack" and "unpack".Note: The function must adhere to the principle of first definition, the definition phase is to detect only the syntax does not execute code, the execution phase is the execution code.Second, return value of function　1. Return None if return value is not.2, return returns any type of value.3. Return returns only one value at a time, and its function is to terminate the executio

; a.sort (reverse=true) >> ;> print a[' s ', ' f ', ' f ', ' d ', ' B ', ' A ', ' s ', ' s ', ' G ', ' f ', ' d ', ' d ', ' d ', ' A ', ' 5 ', ' 5 ', ' 4 ', ' 3 ', ' 3 ', ' 2 ', ' 2 ', ' 2 ' , ' 1 ']10.list[index]=value and Del List[index]List[index]=value: Assigning a value to a specified cursor in a listDel List[index]: Removes the specified cursor value from the list>>> a=list (' abc123456 ') >>> print a

The Python 2 and Python 3 codes are:1 #_*_coding:utf-8_*_2 #__author__ = "Csy"3 4 classA:5 def __init__(self):6 Print("A")7 8 classB (A):9 PassTen #def __init__ (self): One #print ("B") A - classC (A): - def __init__(self): the Print("C")

#!/usr/bin/python#-*-coding:utf-8-*- fromCollectionsImportdeque fromMathImportlog10defpermute (SEQ, index): Seqc=seq[:] seqn=[Seqc.pop ()] Divider= 2 whileSeqc:index, New_index=divmod (Index,divider) Seqn.insert (New_index, Seqc.pop ()) Divider+ = 1returnseqndefz62 ():#0~7 Eight numbers are placed on eight vertices of the cube, and the sum of the four numbers of each polygon is equalA=[0, 1, 2, 3, 4, 5,

for x in ...A loop is a statement that puts each element into a variable and x then executes the indented block . Note: Formatting in Python also acts as a syntax rule, and indenting a block is an examplesummation problem, comparison and similarity 1/Sum=0 forXinch[1,2,3,4,5,6,7,8,9,Ten]: Sum=sum+The xprint (sum) #此行无缩进, which indicates that the print command is not executed until the FOR Loop statement is finished, that the so-called "indent block" i

Python path-basics-6 list and tuple, pythontuple List: A built-in data type in Python is list: list. List is an ordered set that allows you to add and delete elements at any time. For example, you can use a list to list the names of all the students in the class: Classmates = ['Michael ', 'Bob', 'tracy '] print (classmates) # output # -------------------------

Python study Note 6 6.1 dictionary A dictionary is an associated array (or a hash table ). It is a set of objects indexed by keywords. Use braces {} to create a dictionary. Print "Dictionary" dic = {"username": "beazley", "home": "/home/beazley", "uid ": 500} print dicuu = dic ["username"] dd = dic ["home"] print uuprint dddic ["username"] = "pxl" dic ["home"] = "/ home/pxl "dic [" shell "] ="/usr/bin/tcsh

. kwlist:Print '"% s" is a keyword of python' % myInputIsKeyword = TrueIf isIdentifier and (not isKeyword): print 'Okay as an identifier' 6-3.Sort.(A) enter a string of numbers in ascending order.(B) SAME AS. However, it should be arranged in lexicographically ascending order.[Answer](A) The Code is as follows:AList = raw_input ('Please input numbers, separated

Python 3 Study Notes (4) ---- character encoding, functions and parameters, python Study Notes I. character encoding and Transcoding 1. In python2, the default encoding is ASCII, and in python3, the default encoding is unicode.2. unicode is divided into utf-32 (4 bytes), UTF-16 (2 bytes), UTF-8 (1-4 bytes), so UTF-16 is now the most commonly used unicode version,

Smooth python and cookbook Study Notes (6), pythoncookbook1. iterate multiple sequences at the same time (zip (function )) You can use the zip () function to iterate multiple sequences at the same time. >>> X = [1, 2, 3, 4, 5, 6]>>> Y = [121, 223, 116, 666, 919, 2333]>>> for x, y in zip(X, Y):... print(x, y)...1 12

There are now files in the data.csv file encoding format: ANSIData.csv1|1|1| Beijing 2|1|2| Tianjin 3|1|3| Shanghai 4|1|4| Chongqing city 5|1|5| Shijiazhuang City 6|2|5| Tangshan 7|3|5| Qinhuangdao Shi 8|4|5| Hanhan 9|5|5| Xingtai 10|6|5| Baoding 11|7|5| Zhangjiakou 12|8| 5|

Re moduleUsed to match an operation in a regular expression.In Python, in order to avoid the implementation of the output ' \ ', the ' \ n ' character escape problem (such as regular expressions using backslashes "\" to represent a special form or as an escape character, here with the syntax of the Python conflict, so Python uses "\\\\" to denote "\" in the regul

[Python journey] Article 6 (7): development of simple host batch management toolsWith the learning and use of the Paramiko module, as well as the multi-thread and multi-process knowledge in Python, you can develop a simple host batch management tool. Obviously, when you manage hosts in batches, it is best for programs to execute concurrently, because it can maxim