在Python上的.csv文件上获取第一列值

Question

i am newbie at python programming, i have a .csv file containing mac address and signal strength data from an AP consider my csv data is:

i want to get just mac address values which is the 1st row, referring to https://docs.python.org/2/library/csv.html i already tried

import csv
import json

with open('DataFTrainBarucp.csv') as csvfile:
    ader = csv.reader(csvfile)
    for row in ader:
        print row[0]

but it will print the first column from my csv, how to get 1st row data, please help

Answer 1

Do you have to use csv ? The pandas package has easy to use file reading functions with a usecols option. Try something like:

import pandas as pd
my_data = pd.read_csv('my_data_file', sep=',', header=0, usecols=[0])

numpy file reading functions also have a columns option.

Answer 2

Your code works fine for columns. Maybe you meant that you want to print the row (ie the MAC address headers)?

Here is the solution for each:

First Row:

print([x for x in csv.reader(csvfile)][0])

First Column:

print([x[0] for x in csv.reader(csvfile)])