Python | Pandas Series.loc

Python is a great language for doing data analysis, primarily because of the fantastic ecosystem of data-centric python packages. Pandas is one of those packages and makes importing and analyzing data much easier.

Pandas series is a One-dimensional ndarray with axis labels. The labels need not be unique but must be a hashable type. The object supports both integer- and label-based indexing and provides a host of methods for performing operations involving the index.

Pandas Series.loc attribute is used to access a group of rows and columns by label(s) or a boolean array in the given Series object.

Syntax:Series.loc

Parameter : None

Returns : series

Example #1: Use Series.loc attribute to select some values from the given Series object based on the labels.

# importing pandas as pd
import pandas as pd

# Creating the Series
sr = pd.Series(['New York', 'Chicago', 'Toronto', 'Lisbon'])

# Creating the row axis labels
sr.index = ['City 1', 'City 2', 'City 3', 'City 4']

# Print the series
print(sr)

Output :

Now we will use Series.loc attribute to return the values of the selected labels in the given Series object.

# return the selected values.
sr.loc[['City 4', 'City 3', 'City 1']]

Output :

As we can see in the output, the Series.loc attribute has returned the name of the cities whose labels were passed to it.

Example #2 : Use Series.loc attribute to select some values from the given Series object based on the labels.

# importing pandas as pd
import pandas as pd

# Creating the Series
sr = pd.Series(['1/1/2018', '2/1/2018', '3/1/2018', '4/1/2018'])

# Creating the row axis labels
sr.index = ['Day 1', 'Day 2', 'Day 3', 'Day 4']

# Print the series
print(sr)

Output :

Now we will use Series.loc attribute to return the values of the selected labels in the given Series object.

# return the selected values.
sr.loc[['Day 4', 'Day 3', 'Day 1']]

Output :

As we can see in the output, the Series.loc attribute has returned the name of the cities whose labels were passed to it.