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Learn Programming in Python with Cody Jackson

You're reading from   Learn Programming in Python with Cody Jackson Grasp the basics of programming and Python syntax while building real-world applications

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Product type Paperback
Published in Nov 2018
Publisher Packt
ISBN-13 9781789531947
Length 304 pages
Edition 1st Edition
Languages
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Author (1):
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Cody Jackson Cody Jackson
Author Profile Icon Cody Jackson
Cody Jackson
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Table of Contents (14) Chapters Close

Preface 1. The Fundamentals of Python 2. Data Types and Modules FREE CHAPTER 3. Logic Control 4. Functions and Object Oriented Programming 5. Files and Databases 6. Application Planning 7. Writing the Imported Program 8. Automated Software Testing 9. Writing the Fueling Scenario 10. Software Post-Production 11. Graphical User Interface Planning 12. Creating a Graphical User Interface 13. Other Books You May Enjoy

Utility functions

One thing that wasn't addressed in the requirements but will be necessary later is the need for utility functions. These are often found in applications and provide functionality for the main program, but don't directly apply to the core logic.

For this program, we will require a number of utility functions:

  • Calculate liquid flow rate due to gravity
  • Static hydraulic pressure of a fluid due to its height
  • Conversion programs for pressure: specifically, we need to convert fluid head (measured in feet) in to pounds per square inch (PSI)

The functions are shown next (in separate parts), with explanations following each part:

# utility_formulas.py (part 1)
1 #!/usr/bin/env python3 2 3 import math 4 5 GRAVITY = 32.174 # ft/s^2 6 WATER_SPEC_WEIGHT = 62.4 # lb/ft^3 7 WATER_DENSITY = 1.94 # slugs/ft^3 8 WATER_SPEC_GRAV = 1.0

Line 1 is the &quot...

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