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Applying Pandas style between two dataframes differences


What is the difference between old style and new style classes in Python?What is the difference between @staticmethod and @classmethod?Difference between append vs. extend list methods in PythonDifference between __str__ and __repr__?Selecting multiple columns in a pandas dataframeAdding new column to existing DataFrame in Python pandasDelete column from pandas DataFrame by column nameHow to iterate over rows in a DataFrame in Pandas?Select rows from a DataFrame based on values in a column in pandasGet list from pandas DataFrame column headers













1















I've seen a lot of questions about finding the differences between two pandas dataframes, however here i'm trying to apply a Pandas.Style difference between two dataframes. Given these two example dataframes i'm hoping to have a formatter applied to right[1, "B"] and right["D"] because they're different that lefts values or new in general:



left = pd.DataFrame([[1,1,1], [2,2,2]], columns=list("ABC"))
right = pd.DataFrame([[1,1,10], [2,5,10]], columns=list("ABD"))


Here's my idea for the formatting method guided by the pandas documentation



def formatter(s, new):
if s.name not in new.columns:
# column doesn't exist strike through entire thing
return "color: red; text-decoration: line-through;"

elif not s.equals(new[s.name]):
# apply per value a comparision of the elements
# for val in s:
# if val != right[val.index??]:
return "color: red; text-decoration: line-through;"

return "color: black;"

left.style.apply(formatter, args=(right))


My thinking is that afterwards I should have something that is html like such:






<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>A</th>
<th>B</th>
<th>C</th>
</tr>
</thead>
<tbody>
<tr>
<th>0</th>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<th>1</th>
<td>2</td>
<td>2</td>
<td>2</td>
</tr>
</tbody>
</table>








<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>A</th>
<th>B</th>
<th>C</th>
</tr>
</thead>
<tbody>
<tr>
<th>0</th>
<td>1</td>
<td>1</td>
<td style="color: red; text-decoration: line-through;">10</td>
</tr>
<tr>
<th>1</th>
<td>2</td>
<td style="color: red; text-decoration: line-through;">5</td>
<td style="color: red; text-decoration: line-through;">10</td>
</tr>
</tbody>
</table>












share|improve this question


























    1















    I've seen a lot of questions about finding the differences between two pandas dataframes, however here i'm trying to apply a Pandas.Style difference between two dataframes. Given these two example dataframes i'm hoping to have a formatter applied to right[1, "B"] and right["D"] because they're different that lefts values or new in general:



    left = pd.DataFrame([[1,1,1], [2,2,2]], columns=list("ABC"))
    right = pd.DataFrame([[1,1,10], [2,5,10]], columns=list("ABD"))


    Here's my idea for the formatting method guided by the pandas documentation



    def formatter(s, new):
    if s.name not in new.columns:
    # column doesn't exist strike through entire thing
    return "color: red; text-decoration: line-through;"

    elif not s.equals(new[s.name]):
    # apply per value a comparision of the elements
    # for val in s:
    # if val != right[val.index??]:
    return "color: red; text-decoration: line-through;"

    return "color: black;"

    left.style.apply(formatter, args=(right))


    My thinking is that afterwards I should have something that is html like such:






    <table border="1" class="dataframe">
    <thead>
    <tr style="text-align: right;">
    <th></th>
    <th>A</th>
    <th>B</th>
    <th>C</th>
    </tr>
    </thead>
    <tbody>
    <tr>
    <th>0</th>
    <td>1</td>
    <td>1</td>
    <td>1</td>
    </tr>
    <tr>
    <th>1</th>
    <td>2</td>
    <td>2</td>
    <td>2</td>
    </tr>
    </tbody>
    </table>








    <table border="1" class="dataframe">
    <thead>
    <tr style="text-align: right;">
    <th></th>
    <th>A</th>
    <th>B</th>
    <th>C</th>
    </tr>
    </thead>
    <tbody>
    <tr>
    <th>0</th>
    <td>1</td>
    <td>1</td>
    <td style="color: red; text-decoration: line-through;">10</td>
    </tr>
    <tr>
    <th>1</th>
    <td>2</td>
    <td style="color: red; text-decoration: line-through;">5</td>
    <td style="color: red; text-decoration: line-through;">10</td>
    </tr>
    </tbody>
    </table>












    share|improve this question
























      1












      1








      1








      I've seen a lot of questions about finding the differences between two pandas dataframes, however here i'm trying to apply a Pandas.Style difference between two dataframes. Given these two example dataframes i'm hoping to have a formatter applied to right[1, "B"] and right["D"] because they're different that lefts values or new in general:



      left = pd.DataFrame([[1,1,1], [2,2,2]], columns=list("ABC"))
      right = pd.DataFrame([[1,1,10], [2,5,10]], columns=list("ABD"))


      Here's my idea for the formatting method guided by the pandas documentation



      def formatter(s, new):
      if s.name not in new.columns:
      # column doesn't exist strike through entire thing
      return "color: red; text-decoration: line-through;"

      elif not s.equals(new[s.name]):
      # apply per value a comparision of the elements
      # for val in s:
      # if val != right[val.index??]:
      return "color: red; text-decoration: line-through;"

      return "color: black;"

      left.style.apply(formatter, args=(right))


      My thinking is that afterwards I should have something that is html like such:






      <table border="1" class="dataframe">
      <thead>
      <tr style="text-align: right;">
      <th></th>
      <th>A</th>
      <th>B</th>
      <th>C</th>
      </tr>
      </thead>
      <tbody>
      <tr>
      <th>0</th>
      <td>1</td>
      <td>1</td>
      <td>1</td>
      </tr>
      <tr>
      <th>1</th>
      <td>2</td>
      <td>2</td>
      <td>2</td>
      </tr>
      </tbody>
      </table>








      <table border="1" class="dataframe">
      <thead>
      <tr style="text-align: right;">
      <th></th>
      <th>A</th>
      <th>B</th>
      <th>C</th>
      </tr>
      </thead>
      <tbody>
      <tr>
      <th>0</th>
      <td>1</td>
      <td>1</td>
      <td style="color: red; text-decoration: line-through;">10</td>
      </tr>
      <tr>
      <th>1</th>
      <td>2</td>
      <td style="color: red; text-decoration: line-through;">5</td>
      <td style="color: red; text-decoration: line-through;">10</td>
      </tr>
      </tbody>
      </table>












      share|improve this question














      I've seen a lot of questions about finding the differences between two pandas dataframes, however here i'm trying to apply a Pandas.Style difference between two dataframes. Given these two example dataframes i'm hoping to have a formatter applied to right[1, "B"] and right["D"] because they're different that lefts values or new in general:



      left = pd.DataFrame([[1,1,1], [2,2,2]], columns=list("ABC"))
      right = pd.DataFrame([[1,1,10], [2,5,10]], columns=list("ABD"))


      Here's my idea for the formatting method guided by the pandas documentation



      def formatter(s, new):
      if s.name not in new.columns:
      # column doesn't exist strike through entire thing
      return "color: red; text-decoration: line-through;"

      elif not s.equals(new[s.name]):
      # apply per value a comparision of the elements
      # for val in s:
      # if val != right[val.index??]:
      return "color: red; text-decoration: line-through;"

      return "color: black;"

      left.style.apply(formatter, args=(right))


      My thinking is that afterwards I should have something that is html like such:






      <table border="1" class="dataframe">
      <thead>
      <tr style="text-align: right;">
      <th></th>
      <th>A</th>
      <th>B</th>
      <th>C</th>
      </tr>
      </thead>
      <tbody>
      <tr>
      <th>0</th>
      <td>1</td>
      <td>1</td>
      <td>1</td>
      </tr>
      <tr>
      <th>1</th>
      <td>2</td>
      <td>2</td>
      <td>2</td>
      </tr>
      </tbody>
      </table>








      <table border="1" class="dataframe">
      <thead>
      <tr style="text-align: right;">
      <th></th>
      <th>A</th>
      <th>B</th>
      <th>C</th>
      </tr>
      </thead>
      <tbody>
      <tr>
      <th>0</th>
      <td>1</td>
      <td>1</td>
      <td style="color: red; text-decoration: line-through;">10</td>
      </tr>
      <tr>
      <th>1</th>
      <td>2</td>
      <td style="color: red; text-decoration: line-through;">5</td>
      <td style="color: red; text-decoration: line-through;">10</td>
      </tr>
      </tbody>
      </table>








      <table border="1" class="dataframe">
      <thead>
      <tr style="text-align: right;">
      <th></th>
      <th>A</th>
      <th>B</th>
      <th>C</th>
      </tr>
      </thead>
      <tbody>
      <tr>
      <th>0</th>
      <td>1</td>
      <td>1</td>
      <td>1</td>
      </tr>
      <tr>
      <th>1</th>
      <td>2</td>
      <td>2</td>
      <td>2</td>
      </tr>
      </tbody>
      </table>





      <table border="1" class="dataframe">
      <thead>
      <tr style="text-align: right;">
      <th></th>
      <th>A</th>
      <th>B</th>
      <th>C</th>
      </tr>
      </thead>
      <tbody>
      <tr>
      <th>0</th>
      <td>1</td>
      <td>1</td>
      <td>1</td>
      </tr>
      <tr>
      <th>1</th>
      <td>2</td>
      <td>2</td>
      <td>2</td>
      </tr>
      </tbody>
      </table>





      <table border="1" class="dataframe">
      <thead>
      <tr style="text-align: right;">
      <th></th>
      <th>A</th>
      <th>B</th>
      <th>C</th>
      </tr>
      </thead>
      <tbody>
      <tr>
      <th>0</th>
      <td>1</td>
      <td>1</td>
      <td style="color: red; text-decoration: line-through;">10</td>
      </tr>
      <tr>
      <th>1</th>
      <td>2</td>
      <td style="color: red; text-decoration: line-through;">5</td>
      <td style="color: red; text-decoration: line-through;">10</td>
      </tr>
      </tbody>
      </table>





      <table border="1" class="dataframe">
      <thead>
      <tr style="text-align: right;">
      <th></th>
      <th>A</th>
      <th>B</th>
      <th>C</th>
      </tr>
      </thead>
      <tbody>
      <tr>
      <th>0</th>
      <td>1</td>
      <td>1</td>
      <td style="color: red; text-decoration: line-through;">10</td>
      </tr>
      <tr>
      <th>1</th>
      <td>2</td>
      <td style="color: red; text-decoration: line-through;">5</td>
      <td style="color: red; text-decoration: line-through;">10</td>
      </tr>
      </tbody>
      </table>






      python html pandas






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Mar 8 at 19:59









      TonyTony

      620526




      620526






















          1 Answer
          1






          active

          oldest

          votes


















          1














          It is a bit unclear exactly where you are a stuck, but the code is not far off.



          This might be what you are after:



          left = pd.DataFrame([[1,1,1], [2,2,2]], columns=list("ABC"))
          right = pd.DataFrame([[1,1,10], [2,5,10]], columns=list("ABD"))
          def formatter(s, new):
          if s.name not in new.columns:
          # column doesn't exist strike through entire thing
          return ["color: red; text-decoration: line-through;"]*len(s)

          elif not s.equals(new[s.name]):
          return ["color: red; text-decoration: line-through;" if v else "" for v in s == new[s.name]]

          return ["color: black;"]*len(s)

          left.style.apply(formatter, args=[right])


          The formatter method now returns data in the same shape as the input (as per the docs).



          The right dataframe is passed as a list and not a tuple.



          Also changed the per value comparison to return color if they differ, otherwise keep default style.






          share|improve this answer

























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            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            1














            It is a bit unclear exactly where you are a stuck, but the code is not far off.



            This might be what you are after:



            left = pd.DataFrame([[1,1,1], [2,2,2]], columns=list("ABC"))
            right = pd.DataFrame([[1,1,10], [2,5,10]], columns=list("ABD"))
            def formatter(s, new):
            if s.name not in new.columns:
            # column doesn't exist strike through entire thing
            return ["color: red; text-decoration: line-through;"]*len(s)

            elif not s.equals(new[s.name]):
            return ["color: red; text-decoration: line-through;" if v else "" for v in s == new[s.name]]

            return ["color: black;"]*len(s)

            left.style.apply(formatter, args=[right])


            The formatter method now returns data in the same shape as the input (as per the docs).



            The right dataframe is passed as a list and not a tuple.



            Also changed the per value comparison to return color if they differ, otherwise keep default style.






            share|improve this answer





























              1














              It is a bit unclear exactly where you are a stuck, but the code is not far off.



              This might be what you are after:



              left = pd.DataFrame([[1,1,1], [2,2,2]], columns=list("ABC"))
              right = pd.DataFrame([[1,1,10], [2,5,10]], columns=list("ABD"))
              def formatter(s, new):
              if s.name not in new.columns:
              # column doesn't exist strike through entire thing
              return ["color: red; text-decoration: line-through;"]*len(s)

              elif not s.equals(new[s.name]):
              return ["color: red; text-decoration: line-through;" if v else "" for v in s == new[s.name]]

              return ["color: black;"]*len(s)

              left.style.apply(formatter, args=[right])


              The formatter method now returns data in the same shape as the input (as per the docs).



              The right dataframe is passed as a list and not a tuple.



              Also changed the per value comparison to return color if they differ, otherwise keep default style.






              share|improve this answer



























                1












                1








                1







                It is a bit unclear exactly where you are a stuck, but the code is not far off.



                This might be what you are after:



                left = pd.DataFrame([[1,1,1], [2,2,2]], columns=list("ABC"))
                right = pd.DataFrame([[1,1,10], [2,5,10]], columns=list("ABD"))
                def formatter(s, new):
                if s.name not in new.columns:
                # column doesn't exist strike through entire thing
                return ["color: red; text-decoration: line-through;"]*len(s)

                elif not s.equals(new[s.name]):
                return ["color: red; text-decoration: line-through;" if v else "" for v in s == new[s.name]]

                return ["color: black;"]*len(s)

                left.style.apply(formatter, args=[right])


                The formatter method now returns data in the same shape as the input (as per the docs).



                The right dataframe is passed as a list and not a tuple.



                Also changed the per value comparison to return color if they differ, otherwise keep default style.






                share|improve this answer















                It is a bit unclear exactly where you are a stuck, but the code is not far off.



                This might be what you are after:



                left = pd.DataFrame([[1,1,1], [2,2,2]], columns=list("ABC"))
                right = pd.DataFrame([[1,1,10], [2,5,10]], columns=list("ABD"))
                def formatter(s, new):
                if s.name not in new.columns:
                # column doesn't exist strike through entire thing
                return ["color: red; text-decoration: line-through;"]*len(s)

                elif not s.equals(new[s.name]):
                return ["color: red; text-decoration: line-through;" if v else "" for v in s == new[s.name]]

                return ["color: black;"]*len(s)

                left.style.apply(formatter, args=[right])


                The formatter method now returns data in the same shape as the input (as per the docs).



                The right dataframe is passed as a list and not a tuple.



                Also changed the per value comparison to return color if they differ, otherwise keep default style.







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Mar 9 at 6:24

























                answered Mar 8 at 20:38









                John SloperJohn Sloper

                1,126713




                1,126713





























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