Convert shell to Python

Question

#!/bin/sh
if [ ! -d $1 ]
 then echo $1 nu este director
  exit1
fi 
ls -R $1 >temp
permission= ls -al $1 | cut -d" " -f1   
for i in `cat temp`
do 
  perm= ls -l $i | cut -d" " -f1  
if [ $permission -ne $perm ] 
   then n=`expr $n + 1`
fi
echo   $n
done

how can i transform this shell code into python? please help