circuitpython/tests/basics/bytearray_add.py

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# test bytearray + bytearray
b = bytearray(2)
b[0] = 1
b[1] = 2
print(b + bytearray(2))
# inplace add
b += bytearray(3)
print(b)
# extend
b.extend(bytearray(4))
print(b)
# this inplace add tests the code when the buffer doesn't need to be increased
b = bytearray()
b += b''