How do I plot after read a csv file

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Python3.6

I have 22 file in different subfolder with same name. I write this code to read the files one after another. Each file has 28800 row and 207 column. I want to plot all read data at once for my choice of column.

What I have tried:

import os, sys


# Specify directory
# In your case, you may want something like the following
my_directory = 'C:/Users/Arijeet/Downloads/Data/IRNSS2018-8-10_23-52-46'


# Define the counter
counter = 1

# Start the loop
for folder, sub_folders, files in os.walk(my_directory):
  for special_file in files:
    if special_file == 'iono_tropo.csv':
      file_path = os.path.join(folder, special_file)

      # Open and read
      with open(file_path, 'r+') as read_file:
        print('Reading iono_tropo csv file ' + str(counter))

        # Print the file
        for line in read_file:
          print(line)

        # Increment the counter
        counter += 1