import re
a = 'hello.mate(how.are.you). And another string(here.too)'
content_in_brackets = re.findall(r'\((.*)\)', a)
for con in content_in_brackets:
a = a.replace(con, con.replace('.', '|DOT|'))
print(a)
aW1wb3J0IHJlCmEgPSAnaGVsbG8ubWF0ZShob3cuYXJlLnlvdSkuIEFuZCBhbm90aGVyIHN0cmluZyhoZXJlLnRvbyknICAKY29udGVudF9pbl9icmFja2V0cyA9IHJlLmZpbmRhbGwocidcKCguKilcKScsIGEpCmZvciBjb24gaW4gY29udGVudF9pbl9icmFja2V0czoKICAgIGEgPSBhLnJlcGxhY2UoY29uLCBjb24ucmVwbGFjZSgnLicsICd8RE9UfCcpKQpwcmludChhKQ==