Difference between revisions of "My Python Coding Conventions"
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=== MultiThreading ===
=== MultiThreading ===
Revision as of 09:46, 12 September 2019
- 1 Coding Conventions Etc.
- 1.1 Names
- 1.2 Formatting
- 1.3 Docstrings
- 1.4 Imports
- 1.5 Object Orientation
- 1.6 Documentation for Class Instance Methods
- 1.7 Application Structure
- 1.8 Links
Coding Conventions Etc.
In reading my code it may be of some use to know what conventions I have ( tried ) to follow. The code has been developed over quite a period of time so the standards are not uniform. What I write here are the standards that are in quite a bit of the code and the directions that I am trying to move. In all of the coding consistency is an important standard, I have a ways to go. I am now only coding in Python 3.6 or up. Here are some types of conventions.
I try to be consistent: this is good but have not been very successful in standards: I keep changing my mind. I am avoiding short names and try to make names descriptive enough that they are somewhat self documenting. References are often copied across objects for easy access ( lots of parameters for example ); when this happens the name of the object is generally ( should be always ) the same in both objects.
Nothing special here but I like white space and use a lot. This is not standard Python. But this is what I like.
I am working towards using them but have not arrived at a format that I both like to read and which is quick enough to write. Not good as of 2017 Jan
- In most cases use the format "import xyz" so the name space is not polluted and so it is easy to identify just what an imported class is.
- In in objects that are almost all GUI then using "from Tkinter import *" is ok but better is: "import Tkinter as Tk"
- I normally have only one or a few classes in a file so there are a lot of files and a lot of what I call "local imports".
- Almost all imports are at the top of a file, std library imports first then "local imports".
Almost everything is a class. Not much in the way of module functions, not many classes in a module. I think my Java experience has led me to overuse classes and under use functions.... at the module level.
Documentation for Class Instance Methods
Look something like this:
def create_class_from_strings( self, module_name, class_name): """ This will load a class from string names It makes it easier to specify classes in the parameter file. I believe it is used for both the comm drive and the "processor" args: strings ret: instance of the class Side effects Class created """
The comment should give the intent of the method, some hint as to the args ( which hopefully have good names ), and some info. on the return value. zip means nothing, void....
I am moving toward using __ and _ as prefixes for more private methods, but have not gone too far in this direction.
I try to separate the Model, View, and Controller into separate modules and classes. The View is the class GUI.
- Construct frame by frame in a subroutine returning the frame reference, the caller then places the frame. Typically constructed and placed from top to bottom from left to right.
- Buttons for application management: restart the app, edit the parameters, edit the log, help.
- Buttons.... for the application.
- A text control for application messages, sort of a mini console for the application.
Typical Application Functionality