/Python/Add empty column to dataframe pandas

Add empty column to dataframe pandas

>>> import numpy as np
>>> import pandas as pd
>>> df = pd.DataFrame({"A": [1,2,3], "B": [2,3,4]})
>>> df
   A  B
0  1  2
1  2  3
2  3  4
>>> df["C"] = ""
>>> df["D"] = np.nan
>>> df
   A  B C   D
0  1  2   NaN
1  2  3   NaN
2  3  4   NaN

Source: stackoverflow.com

Add data to empty column pandas

column_names = ["a", "b", "c"]

df = pd.DataFrame(columns = column_names)

df["a"] = [num for num in range(1, 5)]

Similar codes

1 vote258 views1 answer
Python print dict new line
Python
2 votes254 views1 answer
Python convert list to true falsebased on condition
Python
0 vote263 views1 answer
Django redirect to external url
Python Django
1 vote264 views1 answer
Python jwt
Python
0 vote392 views1 answer
Flask request file push request(uploadedfile= request.file) uploadedfile.read()
Python Flask
0 vote274 views1 answer
Python amino acid dictionary
Python
1 vote282 views1 answer
Python define an array with length
Python
0 vote282 views1 answer
Python How To Remove Commas From String
Python
0 vote253 views1 answer
Python select columns names from dataframe
Python
0 vote251 views1 answer
Qlistwidget item clicked event pyqt
Python