l = [x**2 for x in range(100)]
l = [m+n for m in '123' for n in 'abc'] #两层循环
l = [x**2 if x % 2 == 0 else 0 for x in range(100)] #for前面是表达式，必须带else使其完整
l = [x**2 for x in range(100) if x % 2 == 0] #for后面是过滤条件，没有else
l = ['ANgel','VIOLET']
print([s.lower() for s in l])
print(l)
Promethues