David Aldrich wrote:
> Hi
>
> I have a binary file of 32-bit unsigned integers. I want to read all those
> integers into a list.
>
> I have:
>
> ulData = []
> with open(ulBinFileName, "rb") as inf:
> ulData.append(struct.unpack('i', inf.read(4)))
>
> This obviously reads only one integer from the file. How would I modify
> this code to read all integers from the file please?
While the obvious approach would be a loop
data = [] # no misleading prefixes, please
while True:
four_bytes = inf.read(4)
if len(four_bytes) != 4:
if four_bytes:
raise ValueError("number of bytes not a multiple of 4")
break
data.append(struct.unpack("i", four_bytes))
there is also the array module:
data = array.array("i", inf.read())
You can convert the array to a list with
data = data.tolist()
if necessary.
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