learn python hard way exercise 0

. Therefore, in every day to do the project at the same time, must ensure that a certain amount of time, bad to fill the theoretical knowledge. This part of the book in the watercress and know that there are a lot of summary, you can search by themselves.2) Don't be too tangled up with meaningless questions, such as what frames are good, XX language is better than XX language. Pre-determined the practiced hand project, to concentrate on the accumulation of code volume, accumulate the basic knowl

;>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[

Print_a_line runs, you pass a variable called current_line . Each time the function is called, the current_line is printed out to track how it becomes line_count in the print_a_line . Find out where each function is used in the script. Check the def line to verify that the parameter is not used correctly. Go online and study what the seek function in file does. Try running pydoc file to see if you can learn more. Consider the function of the s

no more nonsense, just talk about dry goods. The keyword "0 basis" and "rapid", for these two words, we should be corresponding to the study plan. First of all, you are a 0 basic person, now urgently need to learn python-related skills, in the "guarantee the quality of learning" while in the shortest time to

. - - """% (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 fromS

I use Python to crawl the movie Heaven contains the source code is very clear, so that 0 basic Python novice can easily learn, really not too much.Let's look at some of our code and crawl to the results:Crawled Movie Resources: (You can get a video tutorial)Steps:1, first import the required modules2, access to web inf

: OutputClass: Declaring a CategoryEXEC: Re-executing the following, exec ("Print ' Hello World '), can be refactored as a command. For example, the obtained variable as a variable.In: Checks whether an element is in a list, a tuple, or a dictionary, and if the check is a dictionary, it is usually checked for key.Raise: Throws a custom exception.Continue: Continue the loop without the next steps.Finally:try the final execution when debugging.IS: The ID that determines whether two objects are con

line, and clarify your ideas for yourself. Even if you can't clear your mind, you can also know exactly where you really didn't understand. Write a script similar to the one in the previous exercise and read the file you just created, using Read and argv . There are too many places to repeat in the file. Try to print line1, line2, line3 with a target.write () , you can use strings, format characters, and escape characters. Find out why w

scan of the patient. You don't get useful information about something, and you'll find that it outputs an attitude of information that's mostly useless, or just makes you more confused. The best way to debug your program is to print the key variables in each key link you want to check, so you can check for errors. Let the program run in part. Don't wait for a long script to finish writing it before you run it. Write a little, run a little, a

Pylash Project AddressCreate a projectIn this case our project will be created, and then just fill in the code in main.py to run.Write Hello World AppletWriting gamesWith a little understanding of pylash, we can begin to write the game. First we delete all the code after line fourth.Introduce the requiredGlobal variablesIn the game to use some of the global variables, we first browse again, different know what they are doing, then will use:Load ResourcesCreate Start interfaceIn the main function

(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

done."Out_file.close ()In_file.close ()#另一种写法 (only one line):From sys import ARGVScript,from_file,to_file = argvOpen (To_file, ' W '). Write (open (from_file). Read ())Exercise: naming, variables, code, functionsWhat are the rules for function names?As with the variable name, it can be as long as it consists of alphanumeric and underscore, and not the number beginning.What does it mean to be *args *?Its function is to tell

effect.MusicThere is also music with animation.The processing of music is as good as playing music in certain places, such as when a bullet is launched, when the background music is hit, when the game is over, and so on. Their processing logic is the same. Load the resource first and then play it.Playback of background music.Pygame is in the Pygame.mixer method when dealing with background music. The play parameters in which the music plays, the first is played several times, 1 is looped, and t

? What happens if you don't indent? Is it possible to put the other Boolean expressions in Exercise 27 in the "if statement"? Try it. What happens if I change the initial value of the variable people, Cats, and dogs ? Exercise Exercises1.The IF statement.if sentence1: sentence2The sentence one is the judgment part , of course, it can also be a Boolean expression of the previous lesson.T

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

explain the meaning of the code to yourself through annotations. Explain how each function is used, the purpose of each variable, and any other aspect of the content, as long as it helps you to understand the code.Finally, each part of the code that is difficult to track, line-by-row or function-by-bit tracking variable values. You can print one more copy and write the value of each variable you want to "track" in the blanks.Once you have a basic understanding of the function of the code, go ba

this script with Raw_input, think of the way to get the file name better, and why.6. Run Pydoc file to scroll down until you see the read () command (function/method). See a lot of other orders, you can find a few to try. No need to look at the commands that contain __ (two underscores), these are just rubbish.7. Run Python again at the command line to open a file, this open and read method is also worth l