Adafruit CircuitPython 8.2.0 on 2023-07-05; ESP32 Devkit V1 with ESP32
Adafruit CircuitPython 8.2.2 on 2023-08-01; VCC-GND Studio YD RP2040 with rp2040
Adafruit CircuitPython 8.2.0 on 2023-07-05; Adafruit KB2040 with rp2040

def __example_print(string):
    print(string)

class ExampleClass():
    def __init__(self, string) -> None:
        self.string = string
    def do_print(self):
        __example_print(self.string)

# A simple string for testing
string = 'A testing string'

# Should print the string the first time
__example_print(string)

# Create a new object from the class with the same string
new_object = ExampleClass(string)

# Print a second time by accessing the attribute
__example_print(new_object.string)

# Try to run the do_print() method to print it again.
# This should cause an NameError as '__example_print' should be name mangled to '_ExampleClass__example_print', which does not exist
# However, it does not and prints that string we initialized with for the third time
new_object.do_print()

A testing string
A testing string
A testing string

A testing string
A testing string
Traceback (most recent call last):
  File "/tmp/example_code.py", line 26, in <module>
    new_object.do_print()
  File "/tmp/example_code.py", line 9, in do_print
    __example_print(self.string)
    ^^^^^^^^^^^^^^^
NameError: name '_ExampleClass__example_print' is not defined