//...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)
