Python | Pandas Series.set_value() Last Updated : 05 Feb, 2019 Comments Improve Suggest changes Like Article Like Report 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.set_value() function is used to set value of the given series object using the index labels. Syntax: Series.set_value(label, value, takeable=False) Parameter : label : Partial indexing with MultiIndex not allowed value : Scalar value takeable : interpret the index as indexers, default False Returns : series Example #1: Use Series.set_value() function to set the value in the given series object using the index labels. Python3 # importing pandas as pd import pandas as pd # Creating the Series sr = pd.Series(['New York', 'Chicago', 'Toronto', 'Lisbon', 'Rio', 'Moscow']) # Create the Index index_ = ['City 1', 'City 2', 'City 3', 'City 4', 'City 5', 'City 6'] # set the index sr.index = index_ # Print the series print(sr) Output : Now we will use Series.set_value() function to set the value corresponding to the passed index label. Python3 1== # set the value sr.set_value('City 2', 'Dublin') Output : As we can see in the output, the Series.set_value() function has successfully set the value of the passed index label. Example #2: Use Series.set_value() function to set the value in the given series object using the index labels. Python3 # importing pandas as pd import pandas as pd # Creating the Series sr = pd.Series([100, 25, 32, 118, 24, 65]) # Print the series print(sr) Output : Now we will use Series.set_value() function to set the value in the given series object. Python3 1== # set the value to 1000 of # the passed index label sr.set_value(3, 1000) Output : As we can see in the output, the Series.set_value() function has successfully set the value of the passed index label. 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