Python入门教程（更新中，日期：20170710）

1.基本操作

>>>a=[1,2,3];b=a[1:];b
[2, 3]

>>>a=[1,2,3];b=a[:-1];b
[1,2]

>>>a=[1,2,3];b=a[-1];b
3

>>>w=[2]*5
>>>w
[2,2,2,2,2]

4.控制语句

5.条件语句

def sign(self,x):
if (x >= 0):
logic=1
else:
logic=0
return logic

count = 0
while (count < 9):
print 'The count is:', count
count = count + 1

print "Good bye!"