Python dict comprehensions.

double_of_odds_dict.py

# dict comprehensions                                                                                                                          
list = [1,2,3,4,5,6,7,8,9,10]                                                                                                                  
doubles_of_odds_dict = {'number_'+str(i):i*2 for i in list if i%2}                                                                             
doubles_of_odds_dict                                                                                                                           
# out: {'number_1': 2, 'number_3': 6, 'number_5': 10, 'number_7': 14, 'number_9': 18}