python - 将 CSV 从两行转换为带有时间戳的列

Question

我有一个 CSV 文件，格式为两行，其中包含 24 小时的数据: (逗号分隔。我在原来的问题中没有具体说明，抱歉!)

Site ID,Meter Reference,Date,Units,00:30,A,01:00,A,01:30,A,02:00,A,02:30,A,03:00,A,03:30,A,04:00,A,04:30,A,05:00,A,05:30,A,06:00,A,06:30,A,07:00,A,07:30,A,08:00,A,08:30,A,09:00,A,09:30,A,10:00,A,10:30,A,11:00,A,11:30,A,12:00,A,12:30,A,13:00,A,13:30,A,14:00,A,14:30,A,15:00,A,15:30,A,16:00,A,16:30,A,17:00,A,17:30,A,18:00,A,18:30,A,19:00,A,19:30,A,20:00,A,20:30,A,21:00,A,21:30,A,22:00,A,22:30,A,23:00,A,23:30,A,00:00,A
Building,A,12/06/15,kWh,1,A,2,A,2,A,1,A,2,A,2,A,1,A,2,A,2,A,1,A,2,A,2,A,1,A,2,A,2,A,1,A,2,A,1,A,2,A,2,A,2,A,1,A,2,A,2,A,0,A,1,A,0,A,1,A,3,A,2,A,2,A,1,A,0,A,0,A,0,A,1,A,0,A,0,A,0,A,1,A,0,A,0,A,0,A,1,A,0,A,0,A,0,A,1,A

我需要将其转换为可以在另一个进程中使用的格式。其中包含完整的时间戳、值(value)和建筑引用。我要把它推到一个 MySQL 表中。

Building,   Kwh,    Timestamp
A,  2,  12/06/15 00:30
A,  3,  12/06/15 01:00
A,  4,  12/06/15 01:30
A,  4,  12/06/15 02:00
A,  2,  12/06/15 02:30
A,  3,  12/06/15 03:00

我曾尝试使用它来旋转数据:

import csv

from itertools import izip
a = izip(*csv.reader(open("Logger.csv", "rb")))
csv.writer(open("Long.csv", "wb")).writerows(a)

但这给了我四行的标题和两行的数据。 今天才开始使用 Python，我可以修改 import csv 使转换更清晰一些。

我尝试运行第二个 python 文件以附加每一行以添加时间戳并删除其中包含“A A”的行。我知道这不是正确的方法，正在寻求指导。

这是我目前的结果

Site ID Building
Meter Reference A
Date    11/06/15
Units   kWh
00:30   2
A   A
01:00   2
A   A
01:30   2
A   A
02:00   2
A   A
02:30   2
A   A
03:00   3

感谢任何帮助

Answer 1

这有效:

## Reading input
input_file = open("input_file_name.csv",'r')

input_data = []
for line in input_file:
  input_data.append(line.split(";"))

date = input_data[1][4]
input_file.close()

## Writting output
output_file = open("output_file_name.csv",'w')

output_file.write("Building;Kwh;Timestamp\n")

swift = 6
size_data = len(input_data[0]) - swift
for i in range(size_data/2):
  hour = input_data[0][swift + 2*i]
  reference = input_data[0][swift + 2*i + 1]
  kwh = input_data[1][swift + 2*i]
  output_file.write(reference+";"+kwh+";"+date+" "+hour+"\n")

output_file.close()