To control the brightness of the screen we e are using the screen-brightness-control library. The screen-brightness-control library has only one class and three functions. The function are mention below:
- get_brightness()
- set_brightness()
- fade_brightness()
Installation: We can install the package by running the follwing pip command:
pip install screen-brightness-control
Example 1: How to Get Screen Brightness
The get_brightness() method returns the current brightness level.
Syntax: get_brightness(max_value=False, raw_value=False, verbose_error=False
Parameters:
- max_value -: returns the maximum value the brightness can be set to. Always returns 100 on Windows. On Linux it returns the value stored in /sys/class/backlight/*/max_brightness if combined with raw_value=True
- raw_value (Linux only) -: returns the value stored in /sys/class/backlight/*/brightness
- verbose_error -: a boolean value to control how much detail any error messages should contain
Returns: Current brightness level
Python3
# importing the module import screen_brightness_control as sbc # get current brightness value current_brightness = sbc.get_brightness() print(current_brightness) # always returns 100 on Windows. max_brightness = sbc.get_brightness(max_value = True) print(max_brightness) |
Output: Suppose the brightness was this:
Then the output will be:
50 100
Example 2: How to Set Screen Brightness
The set_brightness() method changes the brightness of the screen.
Syntax: set_brightness(brightness_level, force=False, raw_value=False, verbose_error=False)
Parameters:
- brightness_level: the level to set the brightness to. Can either be an integer or a string.
- force (Linux only): If set to False then the brightness is never set to less than 1 because on Linux this often turns the screen off. If set to True then it will bypass this check
- raw_value (Linux only): If set to ‘True’ then it attempts to write brightness_level directly to /sys/class/backlight/*/brightness. This will usually fail due to file permissions but it’s here if you need it.
- verbose_error: A boolean value to control how much detail any error messages should contain
Python3
# importing the module import screen_brightness_control as sbc # get current brightnessvalue print(sbc.get_brightness()) #set brightness to 50% sbc.set_brightness(50) print(sbc.get_brightness()) |
Output:
100 50
Example 3: How to Fade the Brightness
The fade_brightness() method fades the brightness from start to finish in steps of increment, pausing for interval seconds between each step.
Syntax: fade_brightness(finish, start=None, interval=0.01, increment=1, blocking=True)
Parameters:
- finish: The brightness value to fade to
- start: The value to start from. If not specified it defaults to the current brightness
- interval: The time interval between each step in brightness
- increment: The amount to change the brightness by each step
- blocking: If set to False it fades the brightness in a new thread
Python3
# importing the module import screen_brightness_control as sbc # get current brightness value print(sbc.get_brightness()) # fade brightness from the current brightness to 50% sbc.fade_brightness(50) print(sbc.get_brightness()) # fade the brightness from 25% to 75% sbc.fade_brightness(75, start = 25) print(sbc.get_brightness()) # fade the brightness from the current # value to 100% in steps of 10% sbc.fade_brightness(100, increment = 10) print(sbc.get_brightness()) |
Output:
75 50 75 100
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