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Change the order of index of a series in Pandas

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Suppose we want to change the order of the index of series, then we have to use the Series.reindex() Method of pandas module for performing this task.

Series, which is a 1-D labeled array capable of holding any data.

Syntax: pandas.Series(data, index, dtype, copy)
 

Parameters:

  • data takes ndarrys, list, constants.
  • index values.
  • dtypes for data types.
  • Copy data, default is False.

For knowing more about the pandas Series click here.

Series.reindex() Method is used for changing the data on the basis of indexes.

Syntax: Series.reindex(labels=None, index=None, columns=None, axis=None, method=None, copy=True, level=None, fill_value=nan, limit=None, tolerance=None)
 

For knowing more about the pandas Series.reindex() method click here.

Let’s create a series:

Python3




# import required library
import pandas as pd
import numpy as np
 
# create numpy array
data = np.array(["Android dev",
                 "content writing",
                 "competitive coding"])
#create a series
total_series = pd.Series(data,
                         index = [1, 2, 3])
 
# show the series
total_series


Output:

Series

Series

Example 1: 

Python3




# import required library
import pandas as pd
import numpy as np
 
# create numpy array
data = np.array(["Android dev",
                 "content writing",
                 "competitive coding"])
# create a series
total_series = pd.Series(data,
                         index = [1, 2, 3])
# reindexing of series
total_series = total_series.reindex(index
                                    = [3, 2, 1])
# show the series
total_series


Output:
 

Reindexing on series

Example 2: 

Python3




# import required library
import pandas as pd
import numpy as np
 
# create numpy array
data = np.array(["Android dev",
                 "content writing",
                 "competitive coding"])
# create a series
total_series = pd.Series(data,
                         index = [1, 2, 3])
# reindexing of series
total_series = total_series.reindex([2, 3, 1])
 
# show the series
total_series


Output:

Reindexing on series-2

 



Last Updated : 06 Jan, 2022
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