Drop all data in a pandas dataframe

Question

I would like to drop all data in a pandas dataframe, but am getting TypeError: drop() takes at least 2 arguments (3 given). I essentially want a blank dataframe with just my columns headers.

import pandas as pd  web_stats = {'Day': [1, 2, 3, 4, 2, 6],              'Visitors': [43, 43, 34, 23, 43, 23],              'Bounce_Rate': [3, 2, 4, 3, 5, 5]} df = pd.DataFrame(web_stats)  df.drop(axis=0, inplace=True) print df 

Answer 1

You need to pass the labels to be dropped.

df.drop(df.index, inplace=True) 

By default, it operates on axis=0.

You can achieve the same with

df.iloc[0:0] 

which is much more efficient.

Answer 2

My favorite:

df = df.iloc[0:0] 

But be aware df.index.max() will be nan. To add items I use:

df.loc[0 if math.isnan(df.index.max()) else df.index.max() + 1] = data