Python3 Practice-Yang Hui triangle/Pascal Triangle

The Yang Hui triangular form is as follows:
          1        1   1      1   2   1    1   3   3   1  1   4   6   4   each   5   10  Ten  5   1    

#Expected output:#[1]#[1, 1]#[1, 2, 1]#[1, 3, 3, 1]#[1, 4, 6, 4, 1]#[1, 5, ten, 5, 1]#[1, 6, 6, 1]#[1, 7, A, 7, 1]#[1, 8,---8, 1]#[1, 9, 126, 126, 9, 1]n =0 forTinchtriangles ():Print(t) n= n + 1ifn = = 10:         Break

ideas:1, the first I-1 line of the last 0, the length and line I will be consistent;2, the nth element value of line I is L (i) [n] = L (i-1) [N-1]+l (I-1) [n] For example:1, i=3, at this time the collection is [1,3,3,1];2, i-1 row set complement 0, set for [1,2,1, 0]3, L (3) [0]=l (2) [ -1]+l (2) [0]=0+1=1     L (3) [1]=l (2) [0]+l (2) [1]=1+2=3      ...]

The code is as follows: def triangles ():     = [1]    while  True:        yield  L        l.append (0)        for   in range (len (L))]n=0 for in triangles ():     Print(t)    = n + 1    if n = =Ten        : break

Python3, List[-1] is represented as the last element in the list collection

Other Related:

This exercise stems from learning the notes in the Python process.

Learning website from Liaoche's official website: http://www.liaoxuefeng.com/wiki/0014316089557264a6b348958f449949df42a6d3a2e542c000

Links to related chapters:

Http://www.liaoxuefeng.com/wiki/0014316089557264a6b348958f449949df42a6d3a2e542c000/ 0014317799226173f45ce40636141b6abc8424e12b5fb27000

Python3 Practice-Yang Hui triangle/Pascal Triangle