Language - Python Windows Command Line: Difference between revisions

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{{Finding Code Samples|Python}}


==Using the Code Samples==
To use the code sample from the [{{server}}/?view=code_samples&lang=Python Code Samples] page, you can click the '''Download Example''' button to download a Python file with the sample code.


==Use Our Examples==
[[Image:Python_Sample_Code_Download.png|link=|center|800px]]
One of the best ways to start programming with Phidgets is to use our example code as a guide. Before we get started, make sure you have read [[#Install Phidget Python module for Windows | how to install the Phidget Python module]] section above.




Now that you have Python and the Phidget Python module installed, select an example that will work with your Phidget:
To run the example, open the command prompt at the location of the example and enter the following command:
*{{SampleCode|Python|Python Examples}}
 
 
Open the command prompt at the location of the example and enter the following command:
<syntaxhighlight lang=bash>
<syntaxhighlight lang=bash>
python example.py
python example.py
</syntaxhighlight>
</syntaxhighlight>


Ensure that PhidgetHelperFunctions.py is in the same folder as the example.
[[Image:Python_Sample_Code_Windows_Command_Line.png|link=|center]]
 
[[Image:Python_command_run.png|link=|center]]
 
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==Setting Up a New Script==
When you are building a script from scratch, or adding Phidget functionality to an existing script, you'll need to configure your program to properly link the Phidget Python library.
 
To include the Phidget Python library, add the following line to your code:
 
<syntaxhighlight lang=python>
from Phidget22.PhidgetException import *
from Phidget22.Phidget import *
</syntaxhighlight>
 
Then, you will also have to add a reference to your particular Phidget. For example, you would include the following line for a DigitalInput:
 
<syntaxhighlight lang=python>
from Phidget22.Devices.DigitalInput import *
</syntaxhighlight>


The script now has access to Phidgets.
The script is now running with Phidgets!


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Revision as of 22:45, 16 October 2019

Language - Python

Windows with Command Line

Welcome to using Phidgets with Python! By using Python, you will have access to the complete Phidget22 API, including events.

The command line is the default environment to make Python programs in Windows, since it's available immediately after installing Python.

Install Phidget Drivers for Windows

Before getting started with the guides below, ensure you have the following components installed on your machine:

  1. You will need the Phidgets Windows Drivers
  2. You will need a version of Python installed on your machine (2.7 and 3.6+ are compatible with Phidgets).


The recommended way to install the Phidget22 Python module is using the PIP package manager.

Python versions 2.7.9+ and 3.4+ include PIP by default.

To install the Phidget22 Python module with PIP, simply open the Command Prompt (press the Windows key and search for "cmd"), and enter the command: 

python -m pip install Phidget22

To install the Phidget22 libraries to a specific Python version, you can use the Python Windows Launcher from the Command Prompt as follows (replace -X.X with your Python version, e.g. -2.7 or -3.6): 

py -X.X -m pip install Phidget22

To install the Phidget22 Python module without PIP, you will need to download the Phidget22 Python module.

After unpacking the Phidget22 Python module, open the Command Prompt (press the Windows key and search for "cmd") Locate the folder where you downloaded the Python module and enter the following command: 

python setup.py install

This will build the module and install the Python module files into your site-packages directory.

Python install.png

Finding Code Samples

To find the code sample to use for your Phidget, navigate to the Code Samples page and select your device from the drop-down menu.

Python sample code.jpg


Once you select your device, the code sample generator will give you a working code sample, and a selection of options to customize it to your needs.

Using the Code Samples

To use the code sample from the Code Samples page, you can click the Download Example button to download a Python file with the sample code.

Python Sample Code Download.png


To run the example, open the command prompt at the location of the example and enter the following command: 

python example.py
Python Sample Code Windows Command Line.png

The script is now running with Phidgets!

What's Next?

Now that you have set up Phidgets to work with your programming environment, we recommend you read our guide on Phidget Programming Basics to learn the fundamentals of programming with Phidgets.Next Arrow.png


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