如何将打印输出的结果存到另一个txt文本上

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with open("D:/CloudMusic/result/tet.txt", "r") as f:
l = f.readlines()
print(l)

计算表达式并输出

for i in l:

print("%s=%s" % (i[:-1], eval(i[:-1])))

print("%s" % int((eval(i[:-1]))),)

with open("D:/CloudMusic/result/tet2.txt", "r") as f:
    for i in l:     
        f.write("%s\n" % int((eval(i[:-1]))), )