使用Python在三个不同的站中读取三组数据

Question

I have a file like this (data.txt):

Each column contains data from 3 different stations (1,2,3..1,2,3..so on), so now I want to read the data from each station 1(line 1, line 4, line 7), station 2 (line 2, line 5, line 8) and station 3 (line 3, line 6, line 9)....

How could I do? My appologies if someone had asked before.

Thanks

Answer 1

If your data is comma delimited this will work:

with open('data.txt') as d:
    data = [list(map(float, line.split(','))) for line in d]
    station1 = data[::3] #from first with step 3
    station2 = data[1::3] #from second with step 3
    station3 = data[2::3] #from third with step 3
    print station1
    print station2
    print station3

However, if you use other delimiter change split() argument to it's value.

EDIT

You must be using Python 3.x so you need to convert map into list. In 3.x map() returns iterator.

Answer 2

with open("myfile.txt") as f:
    lines = [line.rstrip('\n').split(" ") for line in f]


station_1_data = lines[0::3]

station_2_data = lines[1::3]

station_3_data = lines[2::3]