/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

0 vote326 views1 answer
Data must be 1-dimensional pd.dataframe
Python
0 vote337 views1 answer
Extract x y coordinates from image in pdf python
Python
1 vote335 views1 answer
Read a function of excel in python
Python
3 votes335 views1 answer
How ot split a string every fourth eter
Python
0 vote308 views1 answer
Python area calculator
Python
7 votes356 views4 answers
Python tkinter button multiple commands
Python
6 votes337 views1 answer
Send data through tcp sockets python
Python
3 votes320 views2 answers
How to get key value in nested dictionary python
Python
23 votes498 views6 answers
Flask getting started
Python Flask
2 votes321 views1 answer
Django.core.exceptions.ImproperlyConfigured
Python