title: Import CSV File and Doing arithmetic Opertions without importing any Library in PYTHON
body: <p>My CSV file Looks Like this</p>
  
  <pre><code>Time_stamp; Mobile_number; Download; Upload; Connection_start_time; Connection_end_time; location
  1/2/2020 10:43:55;+917777777777;213455;2343;1/2/2020 10:43:55;1/2/2020 10:47:25;09443
  1/3/2020 10:33:10;+919999999999;345656;3568;1/3/2020 10:33:10;1/3/2020 10:37:20;89442
  1/4/2020 11:47:57;+919123456654;345789;7651;1/4/2020 11:11:10;1/4/2020 11:40:22;19441
  1/5/2020 11:47:57;+919123456543;342467;4157;1/5/2020 11:44:10;1/5/2020 11:59:22;29856
  1/6/2020 10:47:57;+917777777777;213455;2343;1/6/2020 10:43:55;1/6/2020 10:47:25;09443
  </code></pre>
  
  <p>MY Question is
  Without importing any Library file
  How i can read a CSV file &amp; user have to enter the Mobile number &amp; Program should show the Data usage of that number. ie: Arithmetic Operation (Adding Uplink &amp; downlink ) &amp; get the result (Total Data Used)of that specific Mobile number. </p>
  
  <p>Here is what my code looks Like. ( i don't want to import any Pandas Library. )</p>
  
  <pre><code>import pandas as pd
  df = pd.read_csv('test.csv', sep=';')
  df.columns = [col.strip() for col in df.columns]
  usage = df[['Download', 'Upload']][df.Mobile_number == +917777777777].sum().sum()
  print(usage)
  </code></pre>