f = open('a.txt', 'r', encoding='utf-8')
d = f.read()
f.close()
code = input('输入学号')
s = True
for i in d.split('\n'):
xuehao, name = i.split(' ')
if code == xuehao:
print(f'学号{xuehao}的姓名:{name}')
s = False
if s:
print('查无此人')
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