题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
def fun1():
str1 = input()
num1 = []
if len(str1) == 0:
print(0)
for i in str1:
num1.append(i)
print(len(set(num1)))
if __name__ == "__main__":
try:
fun1()
except Exception as eee:
print("报错{}".format(eee))
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