Python之列表推导式List comprehensions例解

Python supports a concept called “list comprehensions”. It can be used to construct lists in a very natural, easy way, like a mathematician is used to do.

#the first try
#=============================
number = range(10)
size = len(number)
event = []
i = 0
while i < size:
    if i%2 == 0:
        event.append(i)
    i += 1
print event

By using Python List comprehensions as below:

#improve
#=============================
print [i for i in range(10) if i%2 == 0]