/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

105 votes118 views4 answers
How to get random number python
Python
44 votes112 views6 answers
Python list all files in directory
Python
0 vote113 views1 answer
Python how to align text writen to a file
Python
2 votes105 views1 answer
How to change the color of the cursor in tkinter
Python
0 vote105 views1 answer
Sympy.diff
Python
0 vote66 views0 answer
Python
7 votes109 views3 answers
Stack in python
Python
2 votes100 views1 answer
Importying listviewin django
Python
0 vote107 views1 answer
Give cell format to condition pandas dataframe
Python
60 votes106 views4 answers
Python choose random sample from list
Python