Answers for "add columns in a pandas dataframe"

31

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
Posted by: Guest on March-18-2020
0

insert new column to dataframe

group = np.random.randint(10, size=6)
df_new['Group'] = group
Posted by: Guest on May-20-2021

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