circuitpython/tests/micropython/heapalloc_bytesio2.py

# Creating BytesIO from immutable object should not immediately
# copy its content.
try:
    import io
    import micropython

    micropython.mem_total
except (ImportError, AttributeError):
    print("SKIP")
    raise SystemExit


data = b"1234" * 256

before = micropython.mem_total()

buf = io.BytesIO(data)

after = micropython.mem_total()

print(after - before < len(data))
py/objstringio: If created from immutable object, follow copy on write policy. Don't create copy of immutable object's contents until .write() is called on BytesIO. 2017-06-05 23:54:21 +03:00			`# Creating BytesIO from immutable object should not immediately`
			`# copy its content.`
			`try:`
remove last uses of 'u' prefix 2023-08-22 11:15:46 -04:00			`import io`
py/objstringio: If created from immutable object, follow copy on write policy. Don't create copy of immutable object's contents until .write() is called on BytesIO. 2017-06-05 23:54:21 +03:00			`import micropython`
run code formatting script 2021-03-15 19:27:36 +05:30
py/objstringio: If created from immutable object, follow copy on write policy. Don't create copy of immutable object's contents until .write() is called on BytesIO. 2017-06-05 23:54:21 +03:00			`micropython.mem_total`
			`except (ImportError, AttributeError):`
			`print("SKIP")`
			`raise SystemExit`


			`data = b"1234" * 256`

			`before = micropython.mem_total()`

remove last uses of 'u' prefix 2023-08-22 11:15:46 -04:00			`buf = io.BytesIO(data)`
py/objstringio: If created from immutable object, follow copy on write policy. Don't create copy of immutable object's contents until .write() is called on BytesIO. 2017-06-05 23:54:21 +03:00
			`after = micropython.mem_total()`

			`print(after - before < len(data))`