Learn Python the Hard Way (2nd Edition) by Zed A. Shaw PDF

By Zed A. Shaw

It is a very newbie booklet for those that are looking to discover ways to code. if you happen to can already code then the ebook will most likely force you insane. It's meant for those that don't have any coding chops to accumulate their abilities prior to beginning a extra certain publication. The second version gains five new routines, fixes and updates to almost each workout, and 3 of the hot workouts train you to create an easy net software because the ultimate a part of the publication.

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Let's start by importing a few objects. py, rather than in the notebook's input! magic import (Magics, magics_class, line_magic) import numpy as np 2. We create a RandomMagics class deriving from Magics. This class contains a few configurable parameters: @magics_class class RandomMagics(Magics): text = Unicode(u'{n}', config=True) max = Int(1000, config=True) seed = Int(0, config=True) 36 Chapter 1 3. We need to call the parent's constructor. seed or None) 4. max)) 5. register_magics(RandomMagics) 6.

Python is typically slower than C because of its interpreted and dynamically-typed nature. ff The data in a NumPy array is stored in a contiguous block of memory in RAM. This property leads to more efficient use of CPU cycles and cache. There's more... There's obviously much more to say about this subject. Our previous book, Learning IPython for Interactive Computing and Data Visualization, contains more details about basic array operations. We will use the array data structure routinely throughout this book.

How to do it... 0! 1. py file. This file will contain the implementation of our custom kernel. py, rather than in the notebook's input! pyplot as plt from io import BytesIO import urllib, base64 40 Chapter 1 2. getvalue())) 3. Now, we write a function that parses a code string, which has the form y = f(x), and returns a NumPy function. strip(), _numpy_namespace, {'x': x}) 4. For our new wrapper kernel, we create a class that derives from Kernel. 0' language = 'python' # will be used for # syntax highlighting language_version = '' banner = "Simple plotting" 5.

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