list保留小数位数

将下面的list保留4位小数输出 a = [0.00256,0.00265,0.00254,0.00258] 1，输出之后是浮点数 a = [0.00256,0.00265,0.00254,0.00258] b = [round(i,4) for i in a] >>> b 0.0026 0.0027 0.0025 0.0026 值得注意的是round函数有时候结果并不像我们想的那样，比如下面的

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