# ==========================四种生成一个从0开始的n个数字的列表==========================
# ==第一种===========================================================================
def test1():
l = []
for i in range(1000):
l = l + [i]
# ==第二种(append )=================================================================
def test2():
l = []
for i in range(1000):
l.append(i)
# ==第三种(列表推导式)===============================================================
def test3():
l = [i for i in range(1000)]
# ==第四种(list )=====================================================================
def test4():
l = list(range(1000))