Python123编程

with open(r'E:\a.txt','r') as f1:
    f2 = f1.read()
#打印a.txt内容
for i in f2:
    print(i,end=' ')
#小写转大写
s = f2.upper()
with open(r'E:\b.txt','w') as f3:
    f3.write(s)