[Tutor] reg expression substitution question

[Scott Ralph Comboni]

I have used perl -p -i -e 's/someName/replaceName/g' <file name>. Is
there a way to do this type of substitution with the re module?
I have tried various ways but all I can come up with is this>>

file = open('config.h').read()
newfile = open('config.h.new','w')
s = re.sub('8192', '32768', file)
newfile.write(s)
newfile.close()

Is there a way I can just read and write to the same file?
Thanks Scott

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Scott Ralph Comboni
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