learn python hard way 4th edition

"debugger." A debugger is like doing a full-body scan on a sick person. YouDon't get any specific useful information, and you find a whole lot of information thatDoesn ' t help and is just confusing.2. The best-of-the-to-debug a program is-use print-to-print out the values of variables atPoints in the program to see where they go wrong.3. Make sure parts of the your programs work as your work on them. Do not write massive filesof code before you try to run them. Code a little, run a little, fix

#coding =utf-8The data for the #raw_input () function output is "str", which needs to be processed into data, using the Int () function to convert "str" to data for processingStudents = Int (raw_input ("Students number")Fees_per_person = 80Cost = students * 3Total_income = students * Fees_per_personTotal_profit = Total_income-costPrint "Our total_income is:%d."% Total_incomePrint "Our Total_profit is:%d."% Total_profitIf Total_profit > 1000:Print "\twe is making big money now."If Total_profit >

ReferenceZed Shaw-learn Python the HardEx0:the SetupWindowsPython 2, Atom, Terminal.EX1:A Good First ProgramKeyword1 Print 2 Print " "Run the file1 python ex1.pyErrorGarbled ChinesePossible Solutions (unfortunately, none of them works.)1. Add ASCII Encodings1 # -*-coding:utf-8-*-2. Decode ENCODE011 Print ' English '. Decode ("utf-8"). Encode ("gb2312") 2 Print '

being, it always comes when you understand.The results you should seeThe following is the result of a conversation with python after you have guessed the result yourself:$ pythonpython 2.5.1 (r251:54863, Feb 6, 19:02:12)[GCC 4.0.1 (Apple Inc. build 5465)] on DarwinType " Help "," copyright "," credits "or" license "for more information. True true2TrueBonus points Exercise Python also has many

hand and make sense of why.2. To find a practical project practiced hand. The best thing is to have a real project to do. Can find a few classmates together to make a website and so on. Note that real projects are not necessarily commercial projects.3. It's a good idea to find someone who already has python. Ask him a little bit about the idea of learning to plan (it's also a way), and then find him in a j

(0) FolderHigh-speed Python and error-prone (text processing)Python Text processing and JAVA/C10 minutes Learn the basic types of PythonHigh Speed Learning Python (actual combat)The way to Big data processing (10 minutes to learn

-- example demonstration ---- knowledge supplement -- Way to teach. Knowledge points will only gradually increase, a ring set a ring, to ensure that everyone can understand, not only for beginners, penetration testers can also learn from the relevant knowledge of infiltration! At the same time use python3.6 to write security tools to meet the language version of the requirements! well above is the recomm

return function, try writing a few functions yourself to get them to return some values. You can put anything that can be placed on the right side as the return value of a function. The end of the script is a puzzle. I use the return value of a function as a parameter to another function. I link them together, just like I write math equations. It may be a bit hard to read, but you'll know the result if you run it. Next, you need to try to make t

With the rapid development and progress of Internet technology in China and abroad, Python has been used in the fields of automated operation and maintenance, automated testing, financial quantification strategy analysis, data analysis, crawler development, web site development, scientific computing, and the gap of Python programmers on the market. It also prompted many people to start learning

are using the functions defined in module ex25 . Try to do help (ex25) and help (ex25.break_words) . This is how you get the module help documentation. The so-called help document is what you put in the "" "when you define a function, and they are also known as documentation comments (document annotations), and you'll see something more like that later. Type ex25 repeatedly. It's a very annoying thing. A shortcut is to import the module using the from ex25 import * method. It's equiv

"Save as ..." option, and then select this directory.12. Use the keyboard to switch back to the Terminal window, if you do not know how to use the keyboard switch, you can search the Internet.13. Go back to Terminal and see if you can use the command to see your newly created file, Internet search How to list the contents of the folder.Warning Sometimes you'll miss out on this step:Windows has Python but no path is configured correctly. Confirm that

of the error message into the search engine, and you can see that others have encountered such errors, and you may be able to find how to solve the problem.WarningIf you are from another country and you see an error about ASCII encoding, add this line at the top of your Python script:　# -- Coding:utf-8- -This allows you to use Unicode UTF-8 encoding in your script, and these errors will not occur.Bonus points ExerciseYou will also have a bonus point

fo = open ("./tmp/foo.txt","w+") Fo.write ("Python is a gerat language.\nyeah its great!! \ni am Zhang Yapeng, who is you?\n ") t_str = u' I am Zhang Yanpeng, what are you? ' Print (T_STR) Fo.write (T_STR) Fo.close () #read and Write FR = Open ("./tmp/foo1.txt","r+") FW = Open ("Foo_rw.txt","WB") Done = 0; LocalTime = Time.asctime (Time.localtime (Time.time ())) Print "Local Current time:", LocalTime Fw.

? True or False True True or True True False or True True False or False False and true? True and false False True and true true False and True Td>false false and False false not OR true?

of the "Python is the glue language, using Python to quickly generate a prototype of the program (and sometimes even the final interface of the program), and then to the special requirements of the part, with a more appropriateof the language Rewriting, than such as the Graphics rendering module in 3D games, performance requirements are particularly high, can be rewritten in C + +. "(3) share a very basic

. - - """% (like, age)The results are as follows: (performed under PowerShell)Ps:1. Pydoc in Windows usage, must go into the Python installation directory, execute python-m pydoc raw_input; (Of course you can replace the raw_input with other modules, such as Open, OS,)Here is the exercise code for Exercise 14:1 fromSysImportargv2 3Script, user_name =argv4prompt ='>'5 6 Print "Hi%s, I ' m the%s script."%(u

;>Next we have to do an exercise, you must be very careful, I ask you to write down this exercise, and then try to understand what it does. This exercise is very interesting, you may have the feeling of being enlightened when you finish it.1Cities = {'CA':'San Francisco','MI':'Detroit',2 'FL':'Jacksonville'}3 4cities['NY'] ='New York'5cities['OR'] ='Portland'6 7 def find_city (Themap, State):8 ifState in Themap:9 return Themap[state]Ten Else: OneReturn"Not found." A

notation reserved 2 decimal places>> 1.29e+00Formatting operator Auxiliary directivesSymbolic effect* Define width or decimal point accuracy-Used for left alignment+ Show plus sign (+) in front of positive number# 0 (' 0 ') is displayed in front of the octal number, preceded by ' 0x ' or ' 0X ' in hexadecimal (depending onUsing ' x ' or ' x ')0 The number shown is preceded by ' 0 ' instead of the default space% ' percent ' output a single '% '(VAR) mapping variable (dictionary parameter)M.N m i

Exercise 37: Reviewing various symbolsIt's time to review your learned symbols and Python keywords, and you'll learn something new in this section. What I'm doing here is a list of all the Python symbols and keywords that are worth mastering.In this lesson, you need to review every keyword, remember its role and write it down, and then search the Web for its true

mistaken. You need a way to tell that the double quotes inside the Python string are not true double quotes.To solve this problem, you need to escape the double and single quotes, and let Python enclose the quotation marks in the string. Here's an example:The second method is to use "three quotation marks (triple-quotes)", or "" ", you can put any number of line