join的例子

直接上代码：

片段1：

>>> def func(x):
        print(','.join(str(i) for i in range(1,x+1)))

    
>>> func(5)
1,2,3,4,5
>>> func(10)
1,2,3,4,5,6,7,8,9,10

片段2：

>>> def func(x):
        for i in range(1,x+1):
            print(','.join(str([j,'password'][j==i]) for j in range(1,x+1)))

        
>>> func(10)
password,2,3,4,5,6,7,8,9,10
1,password,3,4,5,6,7,8,9,10
1,2,password,4,5,6,7,8,9,10
1,2,3,password,5,6,7,8,9,10
1,2,3,4,password,6,7,8,9,10
1,2,3,4,5,password,7,8,9,10
1,2,3,4,5,6,password,8,9,10
1,2,3,4,5,6,7,password,9,10
1,2,3,4,5,6,7,8,password,10
1,2,3,4,5,6,7,8,9,password