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rpi_backlight.py

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+import time
+import os
+import sys
+
+__author__ = "Linus Groh"
+__version__ = "1.0.0"
+path = "/sys/class/backlight/rpi_backlight/"
+
+
+def _perm_denied():
+    print("This program must be run as root!")
+    sys.exit()
+
+
+def get_actual_brightness():
+    global path
+    with open(os.path.join(path, "actual_brightness"), "r") as f:
+        return int(f.read())
+
+
+def get_max_brightness():
+    global path
+    with open(os.path.join(path, "max_brightness"), "r") as f:
+        return int(f.read())
+
+
+def set_brightness(value, smooth=True):
+    global path
+    if not 10 < value <= get_max_brightness() or type(value) != int:
+        raise ValueError("value must be between 11 and {}, got {}".format(max_value, value))
+
+    def run(value):
+        try:
+            with open(os.path.join(path, "brightness"), "w") as f:
+                f.write(str(value))
+        except PermissionError:
+            _perm_denied()
+
+    if smooth:
+        v = get_actual_brightness()
+        while v != value:
+            v = v - 1 if v > value else v + 1
+
+            run(v)
+            time.sleep(0.01)
+    else:
+        run(value)
+
+
+def set_power(on):
+    try:
+        with open(os.path.join(path, "bl_power"), "w") as f:
+            if on:
+                f.write("0")
+            else:
+                f.write("1")
+    except PermissionError:
+        _perm_denied()
+
+
+if __name__ == "__main__":
+    if sys.version.startswith("2"):
+        input = raw_input
+
+    success = False
+    while not success:
+        v = input("Enter value of brightness (between 11 and 255): ")
+        try:
+            v = int(v)
+        except ValueError:
+            continue
+        if 10 < v < 256:
+            set_brightness(v)
+            success = True

setup.py

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+from setuptools import setup
+from rpi_backlight import __version__
+
+
+with open("README.rst", "r") as f:
+    long_description = f.read()
+
+setup(name="rpi_backlight",
+      py_modules=["rpi_backlight"],
+      version=__version__,
+      description="Python library containing some functions to control the 7\" touch display from the Raspberry Pi foundation.",
+      long_description=long_description,
+      author="Linus Groh",
+      license="MIT",
+      author_email="[email protected]",
+      url="https://github.com/linusg/rpi-backlight",
+      download_url="https://pypi.python.org/pypi/rpi_backlight",
+      keywords=["raspberry pi", "display", "touchscreen", "brightness"],
+      classifiers=[
+          "Development Status :: 3 - Alpha",
+          "Intended Audience :: Developers",
+          "License :: OSI Approved :: MIT License",
+          "Operating System :: POSIX :: Linux",
+          "Programming Language :: Python",
+          "Programming Language :: Python :: 2",
+          "Programming Language :: Python :: 3",
+          "Topic :: System :: Hardware",
+          "Topic :: Multimedia",
+          "Topic :: Utilities",
+          "Topic :: Software Development :: Libraries",
+          "Topic :: Software Development :: Libraries :: Python Modules"],
+      )