Handling exceptions and cleanup code in python

from __future__ import print_function      #Compatibilidade func print python 2/3
#Handling exceptions and cleanup code in python

#try...except...finally
try:
    a = 1; b = 0;
    c = a/b;
except Exception as ErrMsg:
    print ('ErrMsg:', ErrMsg)
finally:
    print ('Always do it 1')


#try...finally
try:
    a = 1; b = 0;
    #c = a/b;
finally:
    print ('Always do it 3')


#try...except
try:
    a = 1; b = 0;
    c = a/b;
except:
    print ('Ocorreu um erro generico!')