展开元组，以及元组里的元素

1，while while写法

a=[[1,2,3],[4,5],[6,7,8,9],['a','b','c']]
i=0
while i<len(a):
    j=0
    print(a[i],type(a[i]))
    while j<len(a[i]):
        print(a[i][j],end='\n')
        j+=1
    i+=1

2，while for写法

a=[[1,2,3],[4,5],[6,7,8,9],['a','b','c']]
i=0
while i<len(a):
    print(a[i], type(a[i]))
    for ys in a[i]:
        print(ys, end='\n')
    i+=1

3，for while写法

a=[[1,2,3],[4,5],[6,7,8,9],['a','b','c']]
for i in a:
    print(i, type(i))
    j=0
    while j<len(i):
        print(i[j],end='\n')
        j+=1

4，for for写法

a=[[1,2,3],[4,5],[6,7,8,9],['a','b','c']]
for i in a:
    print(i, type(i))
    for ys in i:
         print(ys, end='\n')

5，for for ,range写法

a=[[1,2,3],[4,5],[6,7,8,9],['a','b','c']]
for i in range(0,len(a)):
    print(a[i])
    for j in range(0,len(a[i])):
        print(a[i][j],end='\n')