This patch renames some variables to avoid pylint warning about
Variable name "f" doesn't conform to snake_case naming style (invalid-name)
f is now file
th is now the_en
n is now count
This is handy when we're debugging the thread locks: we can try to
understand which thread does what and how it was called.
Signed-off-by: Eygene Ryabinkin <rea@codelabs.ru>
