title: filter pytrends data and also get data and country columns
body: <p>I'm pulling data from google trends ,encountering some issues:</p>
  <p>code:</p>
  <pre><code>import pandas as pd
  from pytrends.request import TrensReq
  pytrends=TrendReq()
  kw_list= ['Solar power','Starlink']
  df1=pytrends.build(kw_list,timeframe='today 100-w',geo='US','UK')
  df1=pytrends.interest_by_region(),pytrends.interest_over_time()
  df1.to_excel(r'e:\google trends\putout.xlsx')
  
      i want data for 2 regions- US and UK .but it is not working .
      also i want data for past 100 weeks from today's date.I checked on google to see what is the syntax
      for looking in past weeks but no help.
      Also if i use &quot; pytrends.interest_by_region(),pytrends.interest_over_time()&quot;, i get data like:
       solar power       Starlink
  date
  
  But country column is not included.I have used pytrends.interest_by_region() but it is not coming in my dataframe.
  
  Expected output:
                       solar power       Starlink    
  country date                                   
  US      2021-05-01    5                   4
  UK      2021-05-01    4                   5  
  
  ....so on. Let me know how to get both country and date in the dataset.
  </code></pre>
  <p>and</p>
  <p>And finally export it to csv or excel file.</p>