python eval 是怎么回事
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eval函数将字符串当成有效Python表达式来求值，并返回计算结果
例子
x=0
l='<a href="https://www.baidu.com/s?wd=x%2B1&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1Yzn1bsnhc4rjfsPWIbuH0k0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EnHDLrjmLnjTsPHnLPH0drjR1rf" target="_blank" class="-highlight">x+1</a>'
print(eval(l))
结果是1
