python中，向 list 添加数据及几种方法

//...1...
def a():
    list=[]
    for i in range(1000):
        list=list+[i]
    print(list)
 
//...2...
def b():
    list=[]
    for i in range(1000):
        list+=[i]
    print(list)
 
//...3...
def c():
    list=[]
    for i in range(1000):
        list.append([i])
    print(list)
 
//...4...
def d():
    list=[i for i in range(1000)]
    print(list)
 
 
//...5...
def e():
    list(range(1000))
    print(list)