nomes = ['Joao', 'Roberto', 'Pedro', 'Antonio']
# com list comprehension
contagem = [ nome.count('o') for nome in nomes ]
print(contagem)
# ou, com um loop simples
contagem = []
for nome in nomes:
contagem.append(nome.count('o'))
print(contagem)
bm9tZXMgPSBbJ0pvYW8nLCAnUm9iZXJ0bycsICdQZWRybycsICdBbnRvbmlvJ10KCiMgY29tIGxpc3QgY29tcHJlaGVuc2lvbgpjb250YWdlbSA9IFsgbm9tZS5jb3VudCgnbycpIGZvciBub21lIGluIG5vbWVzIF0KcHJpbnQoY29udGFnZW0pCgojIG91LCBjb20gdW0gbG9vcCBzaW1wbGVzCmNvbnRhZ2VtID0gW10KZm9yIG5vbWUgaW4gbm9tZXM6CiAgICBjb250YWdlbS5hcHBlbmQobm9tZS5jb3VudCgnbycpKQpwcmludChjb250YWdlbSk=