bpo-32475: Add argument to peek() into I/O buffer without reading #7947
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Previously it was impossible to ensure that a program had read all of the data out of its buffer before it called `detach()`. With this change, calling `reader.peek(0, False)` will enable the program to gracefully transition from buffered I/O to raw I/O.
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Previously it was impossible to ensure that a program had read all of the data
out of its buffer before it called
detach(). With this change, callingreader.peek(0, False)will enable the program to gracefully transition frombuffered I/O to raw I/O.
https://bugs.python.org/issue32475