循环连接列表 append添加 列表推导式 range函数转换
代码呈现：
from timeit import Timer
def one():
"""循环连接列表"""
l = []
for i in range(1000):
l = l + [i]
def two():
"""append添加"""
l = []
for i in range(1000):
l.append(i)
def three():
"""列表推导式"""
l = [i for i in range(1000)]
def four():
"""range函数转换"""
l = list(range(1000))
T1 = Timer("one()", "from __main__ import one")
print("one: %f sec\n" % T1.timeit(number=1000))
T2 = Timer("two()", "from __main__ import two")
print("two: %f sec\n" % T2.timeit(number=1000))
T3 = Timer("three()", "from __main__ import three")
print("three: %f sec\n" % T3.timeit(number=1000))
T4 = Timer("four()", "from __main__ import four")
print("four: %f sec\n" % T4.timeit(number=1000))结果：
one: 1.095957 sec two: 0.057843 sec three: 0.027013 sec four: 0.011470 sec
