How to access upper left cell of a pandas dataframe?
Question: Here is my Python's Pandas dataframe. How can I access the upper left cell
where `"gender"` is in and change the text? `"gender"` is not in
`names.columns`. So I thought this might be `names.index.name` but that was
not it.

    
    
    import pandas as pd
    
    names = pd.DataFrame({'births': {0: 7065, 1: 2604, 2: 2003, 3: 1939, 4: 1746},
     'gender': {0: 'F', 1: 'M', 2: 'F', 3: 'M', 4: 'F'},
     'name': {0: 'mary', 1: 'anna', 2: 'emma', 3: 'elizabeth', 4: 'minnie'},
     'year': {0: 1880, 1: 1880, 2: 1880, 3: 1880, 4: 1880}})
    
    names = names.pivot_table(index=['name', 'year'], columns='gender', values='births').reset_index()
    

[![enter image description
here](http://i.stack.imgur.com/oUtWw.jpg)](http://i.stack.imgur.com/oUtWw.jpg)


Answer: `gender` is the name of the columns index:

    
    
    In [16]:
    names.columns.name = 'something'
    names
    
    Out[16]:
    something       name  year     F     M
    0               anna  1880   NaN  2604
    1          elizabeth  1880   NaN  1939
    2               emma  1880  2003   NaN
    3               mary  1880  7065   NaN
    4             minnie  1880  1746   NaN
    

You can see this when you look at the `.columns` object:

    
    
    In [18]:
    names.columns
    
    Out[18]:
    Index(['name', 'year', 'F', 'M'], dtype='object', name='gender')
    

I guess it does confusingly look like the index from the output

