Python 多重列表，指定条件下的数据筛选

 针对多组相关数据（例如：同一时间轴下的多个位移量），根据用户给定条件进行数据筛选。

# -*- coding: utf-8 -*-
"""
Created on Mon Aug  5 09:53:30 2019

@author: yujin.wang
"""
def ConditionRemove(data,condition):
    '''
    data - list, multi-layer list.
    condition = string, judge condidtion.
    '''
    a =[]
    isflag = 1
    string ="if "+ condition +":\n"
    string +="                     for k in range(len(data)):\n   \
                        data[k].pop(i+1)\n   \
                  isflag = 1\n"
    while isflag == 1:
        a.extend(data)
        print data
        len0 = len(a[0])
        try:
            for i in range(len(a[0])):
                exec(string)
        except:
            if len(data[0]) == len0:
                break
    return data

if __name__ == '__main__':
    a =[[1,8,6,5,2,6],[1,4,3,6,5,7],[1,2,8,6,5,7]]
    print a
    condition = "(a[0][i]>=a[0][i+1])"
    a1 = ConditionRemove(a,condition)
    print a1

输入 a =[[1,8,6,5,2,6],[1,4,3,6,5,7],[1,2,8,6,5,7]] 和 condition = "(a[0][i]>=a[0][i+1])"

输出 a1=[[1, 8], [1, 4], [1, 2]]