By Mark Pilgrim
After interpreting a couple of reports on what was once the easiest e-book to profit python, i made a decision to aim out Dive Into Python three. I even if got here to the belief, after my buy, that buying(as this e-book is additionally downloaded loose) used to be a mistake.
Arriving at my door step early within the morning I hurriedly opened the package deal to "Dive" into it. to begin with, i spotted that the assessment that acknowledged the publication used to be an actual reproduction of the PDF model was once no longer comic story. The e-book is plagued by many underlined words that, on a working laptop or computer, may absolutely pass you to a informative web site or destiny bankruptcy. No challenge, I pass the creation and opt for the meaty bits.
The e-book teaches python like a biology instructor might train a few frog's organs. It gave me code that's dissected after which defined. So, because the name recommend, I dived strait into Python by way of typing the "code" into my machine and staring at the way it works.
However, whereas compiling the 1st instance application, I bumped into a few matters. a true stynax and string definition nightmare. whatever wasn't correct, I had put in all of the correct courses, types matched up and my code was once similar to the e-book, yet there the place nonetheless concerns. So i am going on-line and money the HTML model. seems the ebook is outlined with none underscores......
Will cease a door or make an excellent paperweight
resource code is dead
regularly need to money on-line version
My advice will be to obtain the PDF model and provides Mark Pilgrim a donation.
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Extra info for Dive Into Python 3 (Books for Professionals by Professionals)
The sys module is an object which has (among other things) an attribute called path. And so forth. Still, this doesn’t answer the more fundamental question: what is an object? Different programming languages define “object” in different ways. In some, it means that all objects must have attributes and methods; in others, it means that all objects are subclassable. In Python, the definition is looser. Some objects have neither attributes nor methods, but they could. Not all objects are subclassable.
Py: Everything if __name__ == '__main__': in Python is an object. print(approximate_size(1000000000000, False)) print(approximate_size(1000000000000)) ☞ Like C, Python uses == for comparison and = for assignment. Unlike C , Python does not support in-line assignment, so there’s no chance of accidentally assigning the value you thought you were comparing. So what makes this if statement special? Well, modules are objects, and all modules have a built-in attribute __name__. A module’s __name__ depends on how you’re using the module.
Python makes it easy to write readable code, so take advantage of it. You’ll thank me in six months. 1. DOCUMENTATION STRINGS You can document a Python function by giving it a documentation string (docstring for short). In this program, the approximate_size() function has a docstring: def approximate_size(size, a_kilobyte_is_1024_bytes=True): '''Convert a file size to human-readable form. Keyword arguments: size -- file size in bytes a_kilobyte_is_1024_bytes -- if True (default), use multiples of 1024 if False, use multiples of 1000 Returns: string ''' Triple quotes signify a multi-line string.