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Software Architecture with Python

Software Architecture with Python

By : Balachandran Pillai
3.5 (6)
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Software Architecture with Python

Software Architecture with Python

3.5 (6)
By: Balachandran Pillai

Overview of this book

This book starts by explaining how Python fits into an application's architecture. As you move along, you will get to grips with architecturally significant demands and how to determine them. Later, you’ll gain a complete understanding of the different architectural quality requirements for building a product that satisfies business needs, such as maintainability/reusability, testability, scalability, performance, usability, and security. You will also use various techniques such as incorporating DevOps, continuous integration, and more to make your application robust. You will discover when and when not to use object orientation in your applications, and design scalable applications. The focus is on building the business logic based on the business process documentation, and understanding which frameworks to use and when to use them. The book also covers some important patterns that should be taken into account while solving design problems, as well as those in relatively new domains such as the Cloud. By the end of this book, you will have understood the ins and outs of Python so that you can make critical design decisions that not just live up to but also surpassyour clients’ expectations.
Table of Contents (12 chapters)
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11
Index

Debugging tools—using debuggers


Most programmers tend to think of debugging as something that they ought to do with a debugger. In this chapter, we have so far seen that more than an exact science, debugging is an art, which can be done using a lot of tricks and techniques rather than directly jumping to a debugger. However, sooner or later, we expected to encounter the debugger in this chapter—and here we are!

The Python Debugger, or pdb as it is known, is part of the Python runtime.

Pdb can be invoked when running a script from the beginning as follows:

$ python3 -m pdb script.py

However, the most common way in which programmers invoke pdb is to insert the following line at a place in the code where you want to enter the debugger:

import pdb; pdb.set_trace()

Let us use this, and try and debug an instance of the first example in this chapter, that is, the sum of the max subarray. We will debug the O(n) version of the code as an example:

def max_subarray(sequence):
    """ Maximum subarray -...
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Software Architecture with Python
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