Question

我有一个包含以下内容的文件：

X1, y1,50 
X1, y2,20
X1, y3,30 
X1, y4,40
X1, y1,70
X1, y2,40
X1, y3,60
X1, y4,80
X3, y1,100
X3, y2,200
X3, y3,300
X3, y4,400
X3, y1,500
X3, y2,600
X3, y3,700
X3, y4,800
X3, xx, d

如何从以下结构中的上述数据创建列表： [[X1,[50,20,30,40],[-1],[70,40,60,80],[-1]],[X2,[100,200,300,400],[-1], [500,600,700,800],[+1]]]

第一个值存储传感器编号Ex：X1,X3,X2,…..（无序列）

的信息

每个传感器在4个不同的行中发送4个不同的变量及其值（除了一个案例：最后一个案例）：y1=50 y2=20,y3=30,y4=40

值-1 / + 1取决于y4后面的下一行：

案例1：

如果下一行包含相同的传感器编号（例如：X1），则变量y1则为-1

案例2：

如果下一行包含不同的传感器编号（例如：X2），则变量y1则为-1

案例3：

如果下一行包含相同的传感器编号（例如：X1），则变量xx则为+1

Answer 1

我是编程的新手，所以我只是为了自己学习。这可能不是一个非常有效的解决方案，但是嘿 - 这是： - ）

import csv  # import csv-module


with open("foo.txt", "r") as csvfile:   # Open file as csvfile
    foo = csv.reader(csvfile)           # Read as comma-separeted file
    raw_data = []
    for row in foo:
        raw_data.append(row)

    def get_sensor_data(sensor_name):
        """This function iterates through raw_data looking for a unique sensor name.
        It makes and packs lists in lists as per your rules on StackOverflow
        ...and returns the correct format for the data of one sensor."""
        sensor_data = [sensor_name]
        sensor_data_block = []

        for line in raw_data:

            if line[1] == " xx":
                sensor_data_block.append([1])
            if line[0] == sensor_name and line[1] == " y4":
                sensor_data_block.append(line[2])
                sensor_data.append(sensor_data_block)
                sensor_data.append([-1])
                sensor_data_block = []
            if line[0] == sensor_name and line[1] != " xx" and line[1] != " y4":
                sensor_data_block.append(line[2])
        return sensor_data

    def make_data_object():
        """This function identifies unique sensor-names in the raw data.
        It uses those names to call the get_sensor_data-function.
        The lists returned from the call are stored in the data_object list. """
        sensor_list = []
        data_object = []

        for line in raw_data:
            # Identifying unique sensor names, and calling the get_sensor_data function to get its data
            try:
                sensor_list.index(line[0])
            except:
                sensor_list.append(line[0])


        for i in sensor_list:
            data = get_sensor_data(i)
            data_object.append(data)

        return data_object


    print(make_data_object())

如何将python中的.csv数据拆分成特定的结构？

1 个答案: