A functional start to computing with Python by Ted Herman

By Ted Herman

A practical begin to Computing with Python allows scholars to speedy research computing with no need to exploit loops, variables, and item abstractions at first. Requiring no previous programming event, the e-book attracts on Python’s versatile facts forms and operations in addition to its potential for outlining new services. besides the specifics of Python, the textual content covers vital suggestions of computing, together with software program engineering motivation, algorithms at the back of syntax ideas, complicated practical programming principles, and, in short, finite nation machines.

Taking a student-friendly, interactive method of educate computing, the publication addresses tougher strategies and abstractions later within the textual content. the writer offers plentiful reasons of information kinds, operators, and expressions. He additionally describes comprehensions―the robust requirements of lists and dictionaries―before introducing loops and variables. This process is helping scholars greater comprehend project syntax and generation by way of giving them a psychological version of refined facts first.

Web Resource
The book’s supplementary site at http://functionalfirstpython.com/ offers many ancillaries, including:

  • Interactive flashcards on Python language elements
  • Links to additional help for every chapter
  • Unit checking out and programming exercises
  • An interactive Python stepper tool
  • Chapter-by-chapter issues
  • Material for lectures

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With operators +, -, and *, an operation on two integers yields an integer. To be consistent, Python should return an integer for division, however, others have a different opinion. This debate was resolved in Python2 in favor of returning an integer whenever two integers are combined by division. Therefore, in Python2, 8/3 is computed to be 2, rounding the true answer down to the nearest integer. Similarly, -8/3 returns -3 by rounding down in Python2. The debate was not fully settled, however.

Square brackets enclose the items in a list. 001,,True] ['i','o','w','a',5,2,2,4,2] [0] [] length is 3 length is 3 syntax error length is 9 length is 1 length is 0 Practically the only difference visible between tuples and lists is that a list with a single item can be denoted without using a comma. Strings Strings are special types for characters. Though a string typically contains only ASCII characters, they can also have characters from other alphabets for Turkish, Chinese, and so forth. Some examples of strings are: 'abc' 'A B' 'this\tthat' "this\tthat" 'we don't know' "we don't know" 'z' '' length is 3 length is 3 length is 9 length is 9 syntax error length is 13 length is 1 length is 0 ✐ ✐ ✐ ✐ ✐ ✐ “book” — 2013/6/21 — 16:18 ✐ ✐ 33 Types The notation for strings gives you several options for saying where a string starts and where it ends.

The C language is “higher level” than assembly language. Again, a programmer creates a file of instructions, however, the instructions can be more in a free-form style. Further, there are conveniences to avoid having to do bookkeeping arithmetic dealing with memory, concise ways of expressing large lists of instructions in just a few lines of text, and more abstract ways of denoting data. In computing science, abstraction techniques give us the leverage to amplify human reasoning. To fully appreciate what that last statement implies, we will need to see many examples, mostly coming later in the book.

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