简单字符串索引和对比
while True: try: str1 = str(input()) cha = str(input()) k = 0 if(ord(cha) >= 65 and ord(cha) <= 90): for i in str1: if(ord(i) >= 65 and ord(i) <= 90): if(ord(i) == ord(cha)): k += 1 if(ord(i) >= 97 and ord(i) <= 122): if(ord(i) - 32== ord(cha)): k += 1 if(ord(cha) >= 97 and ord(cha) <= 122): for i in str1: if(ord(i) >= 65 and ord(i) <= 90): if(ord(i) + 32 == ord(cha)): k += 1 if(ord(i) >= 97 and ord(i) <= 122): if(ord(i) == ord(cha)): k += 1 print(k) except: break