[Tutor] Best solution to modifying code within a distributed library

[Chip Wachob]

Mats,

Silly question here..

But after using the git clone command, I've got a directory of the
Adafruit project in the same directory as my project.

When I import the library, will I get the 'installed' library, or do I
get the library that is in the project directory?

If I have to specify which library to use, how is that done?

Thanks,


On Wed, Sep 19, 2018 at 7:51 PM, Mats Wichmann <mats at wichmann.us> wrote:
> On 09/19/2018 03:47 PM, Chip Wachob wrote:
>> Hello once again,
>>
>> I'm sure this is probably way outside my 'pay grade' but I would like
>> to try an experiment and I'm not sure how to go about it.
>>
>> I'm using the Adafruit FT232 libraries found here:
>>
>> https://github.com/adafruit/Adafruit_Python_GPIO/blob/master/Adafruit_GPIO/SPI.py
>>
>> I'm experiencing some wiggling of the IO lines when I configure the IO
>> pin direction.
>>
>> I've looked through the code in the FT232H.py file and found what I
>> believe to be the culprit.
>>
>> I would like to comment out line 340 (self.mpsse_write_gpio()) to
>> prove that this is what is causing glitches that I do not want.
>>
>> Using the .__file__ inside the interpreter I learned that the file is
>> located here on my machine:
>>
>> /usr/local/lib/python2.7/dist-packages/Adafruit_GPIO-1.0.3-py2.7.egg/Adafruit_GPIO/FT232H.pyc
>>
>> But obviously, this is a binary file.
>>
>> If I understand enough about Python, I believe that I need to edit the
>> FT232H.py file in the .egg file to implement the change.  There is
>> also likely some sort of compilation that needs to be done once the
>> change is made...
>>
>> BUT
>>
>> As I've also learned from our friend Google, one should not be editing
>> .egg files, etc.
>
> You'll want to get the original and work from there. You already know
> where it is - you've included the github link.
>
> It's hard to know how much needs to be explained here... roughly, in
> your project you want to clone the git tree, and make sure that's what
> your experiment is picking up.  That would start as:
>
> git clone https://github.com/adafruit/Adafruit_Python_GPIO.git
>
> or of you want to start with something you might want to create a github
> pull request to the maintainer, make sure you have a github account,
> click the fork button on the github page, then in your own account find
> the URL to give to "git clone" for your fork, and start from there.
>
> to do an experiment, the former ought to be enough, but "there are more
> details", depending on what you're familiar with as far as these tools.
>
> Do write back with more questions if you go down this path...
>
>
>
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