final = codecs.open("info", 'r', 'utf-8')
lines = final.readlines()

if 'Edytuj'.join('n') in lines:
#rest of code

if any('Edytuj' in line for line in lines):
   pass #...

if 'Edytujn' in lines:

with codecs.open("info", 'r', 'utf-8') as file:
    for line in file:
        if u'Edytujn' == line: # match full line
           #rest of code