Todbot's General Python Tricks
These are general Python tips that may be useful in CircuitPython.
blank_array = [0] * 50 # creats 50-element list of zeros
Storing multiple values per list entry
Create simple data structures as config to control your program. Unlike Arduino, you can store multiple values per list/array entry.
mycolors = (
# color val, name
(0x0000FF, "blue"),
(0x00FFFF, "cyan"),
(0xFF00FF, "purple"),
)
for i in range(len(mycolors)):
(val, name) = mycolors[i]
print("my color ", name, "has the value", val)
import sys print(sys.modules.keys()) # 'dict_keys([])' import board import neopixel import adafruit_dotstar print(sys.modules.keys()) prints "dict_keys(['neopixel', 'adafruit_dotstar'])"
a = 123
b = 'hello there'
my_globals = sorted(dir)
print(my_globals)
# prints "['__name__', 'a', 'b']"
if 'a' in my_globals:
print("you have a variable named 'a'!")
if 'c' in my_globals:
print("you have a variable named 'c'!")
Display the running CircuitPython release
With an established serial connection, press Ctrl+c:
Adafruit CircuitPython 7.1.1 on 2022-01-14; S2Pico with ESP32S2-S2FN4R2 >>>
Without connection or code running, check the boot_out.txt file in your CIRCUITPY drive.
import os print(os.uname().release) '7.1.1' print(os.uname().version) '7.1.1 on 2022-01-14'
