tests/io/iobase.py


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try:
    import uio as io
except:
    import io

try:
    io.IOBase
except AttributeError:
    print("SKIP")
    raise SystemExit


class MyIO(io.IOBase):
    def write(self, buf):
        # CPython and uPy pass in different types for buf (str vs bytearray)
        print("write", len(buf))
        return len(buf)


print("test", file=MyIO())