Search sys.path if the filename isn't found.
Include osdefs.h.

two raise posix.error if symlinks aren't supported).

Improved setwincursor() to allow None to explicitly turn the cursor off.

Forget about the temp file.

Count lines in Python.

except get*str*arg --> get*Str*arg; get*str*arg fetches a C string.

guided by a format string, makes all get*arg() functions unnecessary.

Use getargs() function.
Drop re_string from re object.