Pandas insert method allows the user to insert a column in a dataframe or series(1-D Data frame). A column can also be inserted manually in a data frame by the following method, but there isn’t much freedom here.
For example, even column location can’t be decided and hence the inserted column is always inserted in the last position.
DataFrameName.insert(loc, column, value, allow_duplicates = False)
loc: loc is an integer which is the location of column where we want to insert new column. This will shift the existing column at that position to the right.
column: column is a string which is name of column to be inserted.
value: value is simply the value to be inserted. It can be int, string, float or anything or even series / List of values. Providing only one value will set the same value for all rows.
allow_duplicates : allow_duplicates is a boolean value which checks if column with same name already exists or not.
Find the link to csv file used from here.
Inserting a column with static value:
# importing pandas module
pandas as pd
# reading csv file
# displying dataframe - Output 1
After Inserting column:
Passing series with different value for each row:
In this example, a series is created and some values are passed to the series through a for loop. After that, the series is passed in pandas insert function to append series in the Data frame with values passed.
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