1.利用for循环

for i in range(1,10):
    for m in range(1,i+1):
        print(m,'*',i,'=',m*i,end='  ')
    print('\r')

2.改进的for 循环：

for x in range(1,10):
    for y in range(1,x+1):
        print(f'{x}*{y}={x*y}',end='\t')
    print('\r')

3.利用join和占位符：

print('\n'.join([' '.join(['%s*%s=%s'%(y,x,x*y) for y in range(1,x+1)]) for x in range(1,10)]))

4.利用f-string(Python 3.6版本以后可以用)

print('\n'.join([' '.join([f'{y}*{x}={y*x}' for y in range(1,x+1)]) for x in range(1,10)]))