oo

with open('乘法口诀表.txt','w') as f:    f.writelines("1\t2\t3\t4\t5\t6\t7\t8\t9\n")    f.writelines("-"*70+'\n')    str_list=[]    for x in range(1,10):        for y in range(1,10):            str_list.append('%d'%(x*y))            str_list.append('\t')            str_string="".join(str_list)            str_string=str_string+'\n'        f.writelines(str_string)        str_list=[]