Download Think Python: How to Think Like a Computer Scientist (2nd by Allen B. Downey PDF

By Allen B. Downey

ISBN-10: 1491939419

ISBN-13: 9781491939413

In an effort to the way to software, operating with Python is a wonderful method to commence. This hands-on advisor takes you thru the language a step at a time, starting with easy programming options ahead of relocating directly to capabilities, recursion, info constructions, and object-oriented layout. This moment version and its helping code were up-to-date for Python 3.

Through workouts in each one bankruptcy, you'll test programming suggestions as you examine them. imagine Python is perfect for college students on the highschool or collage point, in addition to self-learners, home-schooled scholars, and execs who have to examine programming fundamentals. novices simply getting their toes rainy will how you can commence with Python in a browser.Start with the fundamentals, together with language syntax and semanticsGet a transparent definition of every programming conceptLearn approximately values, variables, statements, capabilities, and knowledge buildings in a logical progressionDiscover tips on how to paintings with documents and databasesUnderstand items, equipment, and object-oriented programmingUse debugging suggestions to mend syntax, runtime, and semantic errorsExplore interface layout, information constructions, and GUI-based courses via case experiences

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Read or Download Think Python: How to Think Like a Computer Scientist (2nd Edition) PDF

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Extra info for Think Python: How to Think Like a Computer Scientist (2nd Edition)

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If there is a syntax error anywhere in your program, Python displays an error message and quits, and you will not be able to run the program. During the first few weeks of your programming career, you might spend a lot of time tracking down syntax errors. As you gain experience, you will make fewer errors and find them faster. Runtime error: The second type of error is a runtime error, so called because the error does not appear until after the program has started running. These errors are also called exceptions because they usually indicate that something exceptional (and bad) has happened.

A function definition specifies the name of a new function and the sequence of statements that run when the function is called. ") Composition | 23 def is a keyword that indicates that this is a function definition. The name of the function is print_lyrics. The rules for function names are the same as for variable names: letters, numbers and underscore are legal, but the first character can’t be a number. You can’t use a keyword as the name of a function, and you should avoid having a variable and a function with the same name.

2360679774997898 But in a script, if you call a fruitful function all by itself, the return value is lost for‐ ever! sqrt(5) This script computes the square root of 5, but since it doesn’t store or display the result, it is not very useful. Void functions might display something on the screen or have some other effect, but they don’t have a return value. If you assign the result to a variable, you get a special value called None: >>> result = print_twice('Bing') Bing Bing >>> print(result) None The value None is not the same as the string 'None'.

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