import timeit


def t1():
    l = []
    for i in range(10000):
        l = l + [i]


def t2():
    l = []
    for i in range(10000):
        l.append(i)


def t3():
    l = [i for i in range(10000)]


def t4():
    l = list(range(10000))


def t5():
    l = []
    for i in range(10000):
        l.insert(0,i)


from timeit import Timer

timer1 = Timer("t1()", "from __main__ import t1")
timer2 = Timer("t2()", "from __main__ import t2")
timer3 = Timer("t3()", "from __main__ import t3")
timer4 = Timer("t4()", "from __main__ import t4")
timer5 = Timer("t5()", "from __main__ import t5")

print("拼接", timer1.timeit(number=100), "seconds")
print("尾部插入 ", timer2.timeit(number=100), "seconds")
print("头部插入 ", timer5.timeit(number=100), "seconds")
print("列表生成式 ", timer3.timeit(number=100), "seconds")
print("list生成 ", timer4.timeit(number=100), "seconds")