[issue15318] IDLE - sys.stdin is writeable

[Roger Serwy]

Roger Serwy <roger.serwy at gmail.com> added the comment:

I tested blockfile-3.diff against the latest code in the repository.

sys.stdin.write returns the wrong error message when passed a non-string. Presently it returns io.UnsupportedOperation instead of TypeError: must be str, not ...

The attached blockfile-4.diff incorporates blockfile-3 and creates a decorator in _RPCFile to ensure the argument is a string and applies it to the _RPCInputFile and _RPCOutputFile write methods.

A simpler alternative would be duplicating the string check code in _RPCInputFile before the raise statement.

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Added file: http://bugs.python.org/file26362/blockfile-4.diff

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