I'm having trouble understanding exactly how this function works. At the
top, there is the following comment:
// We want to call run_one_line, passing in the dictionary and the
command string. We cannot do this through
// PyRun_SimpleString here because the command string may contain
escaped characters, and putting it inside
// another string to pass to PyRun_SimpleString messes up the
escaping. So we use the following more complicated
// method to pass the command string directly down to Python.
Two questions. First, can you elaborate on the issue with escaped
characters? PyRun_SimpleString() should be able to accept strings with
escaped characters in them. Are you saying this isn't the case?
Second, can you explain the more complicated method that is being used? I
see some pipes, a background thraeding doing some reading, something about
dev/null, and a bunch of IOHandler stuff I don't really understand.
If the entire function could be reduced to a single call to
PyRun_SimpleString() if the escaping problem were fixed, then would it work
to try to just manipulate the string directly to double-escape, or do
soemthing else to it so that PyRun_SimpleString worked, to avoid this
complicated logic?
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