By Steven F. Lott
ISBN-10: 1784390348
ISBN-13: 9781784390341
Key Features
- Learn tips on how to write potent Python code
- Get up-to-speed with crucial facts constructions in Python, utilizing sequences, units, and mappings
- Explore Python's striking diversity of gains and detect why it really is essentially the most well known programming languages within the world
Book Description
Python Essentials presents an important journey of the main serious positive aspects of Python. beginning with setup and install, you'll soon dive into exploring built-in-library forms, Python's wealthy selection of operators and integrated services, variables, task and scoping rules.
From this beginning, you'll discover features, an important element of any programming language, together with significant sophistication in defining parameters to a functionality and delivering argument values. discover complex practical programming utilizing generator expressions, comprehensions, and generator services. deal with dossier enter and output utilizing internet providers and context managers, exception dealing with and discover wider, renowned frameworks.
Through this concise and sensible consultant, you are going to discover all you want to comprehend to leverage this strong, and industry-standard, programming language.
What you are going to learn
- Use Python interactively and grasp the paintings of writing effective Python scripts
- Learn recommendations for operating with string facts, together with easy methods to use average expressions to parse strings
- Get to understand how the short-circuit and if-else common sense operators work
- Explore mutable facts buildings together with checklist, set, and dict
- Define features with positional and not obligatory parameters, and discover ways to use key-phrase argument values whilst calling a function
- Write generator capabilities, generator expressions, and comprehensions
- Master using exceptions for dealing with error and different unforeseen conditions
- Understand the significance of operating with records, context supervisor, and the with statement
About the Author
Steven F. Lott has been programming because the 70s, while pcs have been huge, dear, and infrequent. As a freelance software program developer and architect, he has labored on thousands of initiatives, from very small to huge. he is been utilizing Python to unravel company difficulties for over 10 years
Table of Contents
- Getting Started
- Simple information Types
- Expressions and Output
- Variables, project and Scoping Rules
- Logic, Comparisons, and Conditions
- More complicated information Types
- Basic functionality Definitions
- More complicated Functions
- Exceptions
- Files, Databases, Networks, and Contexts
- Class Definitions
- Scripts, Modules, programs, Libraries, and Applications
- Metaprogramming and Decorators
- Fit and end Unit trying out, Packaging, and Documentation
- Next Steps
Read Online or Download Python Essentials - A Rapid Guide to the Fundamental Features of Python PDF
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Extra resources for Python Essentials - A Rapid Guide to the Fundamental Features of Python
Example text
Unless special arrangements are made, Python will search the local directory first, and then will search the library directories. This allows us to run our scripts and Python's built-in applications with a simple, uniform syntax. It also allows us to add our own applications and modules by modifying the PYTHONPATH environment variable. We'll look at the search path in Chapter 12, Scripts, Modules, Packages, Libraries, and Applications. The detailed documentation for the search path is part of the site package.
We'll look at the mathematical operators and some of the standard libraries for working with numbers. We'll also look at some of the more complex data types available, including/alongside specific tuples, strings, and frozensets. These are relatively simple because they are immutable. As is the case with ordinary numbers, the values of these more complex objects don't change either. [ 23 ] Simple Data Types Now we'll look at a number of data types that are built-in as well as some that are part of Python's standard library.
C libraries generally use IEEE 754 floating-point values; Python's float type is the C language double. This means that a float will be a 64-bit value with (effectively) a 53-bit fraction and an 11-bit exponent. The exponent range is from 2−1022 to 21023 . 437 The E notation shows a power of 10. 335437 ×103 . It's very important to note that floating-point values are an approximation. We can't emphasize enough that they're not exact and should not be used for currency calculations. 999999999999999 [ 30 ] Chapter 2 1 6 6 This should not be surprising in any way.