what best proceed open record proud opening python?

what many glorious proceed solve this:

• open record reading, nonetheless wholly already uninterrupted writing


• open record writing, nonetheless wholly already uninterrupted reading writing

the built-in functions work this

>>> route = r"c:\scr.txt"
>>> file1 = open(path, "w")
>>> imitation file1
<open record 'c:\scr.txt', mode 'w' during 0x019f88d8>
>>> file2 = open(path, "w")
>>> imitation file2
<open record 'c:\scr.txt', mode 'w' during 0x02332188>
>>> file1.write("111")
>>> file2.write("222")
>>> file1.close()

scr.txt contains '111'.

>>> file2.close()

scr.txt overwritten contains '222' (on windows, python 2.4).

the fortitude should work inside same slight (like instance above) good another slight uninterrupted file.

it preferred, crashing way keep close open.