trivial-gpio.py

##### common for all of these #####

from pathlib import Path

_gpio_dir = Path('/dev/gpio')



##### version 1

def gpio_get_value( name ):
    return int( (_gpio_dir/name/'value').read_text() )

def gpio_set_value( name, value ):
    (_gpio_dir/name/'value').write_text( str(value) )

print( gpio_get_value( 'my-input' ) )
print( gpio_get_value( 'my-output' ) )
gpio_set_value( 'my-output', 1 )



##### version 2

class Gpio:
    def __init__( self, name ):
        self.name = name
        self._value_path = _gpio_dir/name/'value'

    def get_value( self ):
        return int( self._value_path.read_text() )

    def set_value( self, value ):
        self._value_path.write_text( str( value ) )

my_input = Gpio('my-input')
my_output = Gpio('my-output')

print( my_input.get_value() )
print( my_output.get_value() )
my_output.set_value( 1 )



##### version 3

class Gpio:
    def __init__( self, name ):
        self.name = name
        self._value_path = _gpio_dir/name/'value'

    @property
    def value( self ):
        return int( self._value_path.read_text() )

    @value.setter
    def value( self, value ):
        self._value_path.write_text( str( value ) )

my_input = Gpio('my-input')
my_output = Gpio('my-output')

print( my_input.value )
print( my_output.value )
my_output.value = 1