python出输出字符串方式:
>>> who='knights'
>>> what='NI'
>>> print ('we are the',who,'wha say',what,what,what,what)
we are the knights wha say NI NI NI NI
>>> print ('we are the %s who say %s'% (who,(what+' ')*4))
we are the knights who say NI NI NI NI
>>>
python数字循环
>>> for item in [0,1,2]:
print (item)
0
1
2
>>> for item in range(3):
print (item)
0
1
2
>>>
>>> for item in range(3):
print (item)
0
1
2
>>> foo='abc'
>>> for i in range(len(foo)):
print (foo[i],'%d'% i)
a 0
b 1
c 2
>>>
