/Python/Python how to add columns to a pandas dataframe

Python how to add columns to a pandas dataframe

How to add a column to a pandas df

#using the insert function:
df.insert(location, column_name, list_of_values) 
#example
df.insert(0, 'new_column', ['a','b','c'])
#explanation:
#put "new_column" as first column of the dataframe
#and puts 'a','b' and 'c' as values

#using array-like access:
df['new_column_name'] = value

#df stands for dataframe

Python how to add columns to a pandas dataframe

# Basic syntax:
pandas_dataframe['new_column_name'] = ['list', 'of', 'column', 'values']

# Note, the list of column values must have length equal to the number
# 	of rows in the pandas dataframe you are adding it to.

# Add column in which all rows will be value:
pandas_dataframe['new_column_name'] = value
# Where value can be a string, an int, a float, and etc

Source: pythonexamples.org

Similar codes

0 vote194 views1 answer
Lista to txt python
Python
0 vote192 views1 answer
Antal riksdagsledamöter
Python
1 vote200 views1 answer
Pip install qrcode python
Python
4 votes176 views1 answer
ModuleNotFoundError: No module named 'exceptions'
Python
0 vote172 views1 answer
Matplotlib remove drawn text
Python
44 votes180 views3 answers
Find sum numbers in a list in python
Python
6 votes195 views3 answers
Download image from url python 3
Python
2 votes254 views2 answers
Get_absolute_url django
Python Django
5 votes176 views2 answers
Check if something is nan python
Python
4 votes193 views2 answers
Python find smallest element in dictionary
Python