t = [ {'id':1, 'age':23, 'sejour':'PEKIN'}, {'id':2, 'age':27, 'sejour':'ISTANBUL'},
{'id':3, 'age':53, 'sejour':'LONDRES'}, {'id':4, 'age':41, 'sejour':'ISTANBUL'},
{'id':5, 'age':62, 'sejour':'RIO'}, {'id':6, 'age':28, 'sejour':'ALGER'}]