So including fdopen in that list is incorrect and confusing because it isn't very much like the others.
This from the tutorial may be useful as well. I am maybe old fashioned, but what is the advantage over open file, "a" If you forget closeit might take a while before the file is actually closed.
It is easier that you might think to forget it when the code has multiple exit points, exceptions and so on. When you open with "a" mode, the write position will always be at the end of the file an append.
Using 'a' is not the same as opening with 'w' and seeking to the end of the file - consider what might happen if another program opened the file and started writing between the seek and the write.
On some operating systems, opening the file with 'a' guarantees that all your following writes will be appended atomically to the end of the file even as the file grows by other writes. A few more details about how the "a" mode operates tested on Linux only.
Even if you seek back, every write will append to the end of the file: Opening a file in append mode a as the first character of mode causes all subsequent write operations to this stream to occur at end-of-file, as if preceded the call:This will read read three uint32 values from the file f, which are available in a afterwards.
From the documentation of fromfile: Read n items (as machine values) from the file object f and append them to the end of the array. May 08, · Prior to Python 3, the accepted way to do this was to read data from the file in binary mode, convert the newline characters in the data, and then write the data out again in binary mode.
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