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Pandas Articles
Page 21 of 42
Python Pandas - Getting values from a specific level in Multiindex
To get values from a specific level in Multiindex, use the multiIndex.get_level_values() method in Pandas.At first, import the required libraries −import pandas as pdCreate a multi-index. The names parameter sets the names for the levels in the indexmultiIndex = pd.MultiIndex.from_arrays([[5, 10], [15, 20], [25, 30], [35, 40]], names=['a', 'b', 'c', 'd'])Get value from specific value. Get 0th level value −print("Get level value (0th level)...", multiIndex.get_level_values(0)) Get 1st level value −print("Get level value (1st level)...", multiIndex.get_level_values(1))ExampleFollowing is the code −import pandas as pd # Create a multi-index # The names parameter sets the names for the levels ...
Read MorePython Pandas - Compute indexer and mask for new index even for non-uniquely valued objects
To compute indexer and mask for new index even for non-uniquely values objects, use the index.get_indexer_non_unique() method.Python Pandas - Compute indexer and mask for new index even for non-uniquely valued objectsAt first, import the required libraries −import pandas as pdCreating Pandas index with some non-unique values −index = pd.Index([10, 20, 30, 40, 40, 50, 60, 60, 60, 70]) Display the Pandas index −print("Pandas Index...", index)Compute indexer and mask. Marked by -1, as it is not in index. This also computes non-unique Index object values −print("Get the indexes...", index.get_indexer_non_unique([30, 40, 90, 100, 50, 60])) ExampleFollowing is the code −import pandas as ...
Read MorePython Pandas - Compute indexer and find the nearest index value if no exact match
To compute indexer and find the nearest index value if no exact match, use the index.get_indexer() method. Also set the method parameter to nearest.At first, import the required libraries −import pandas as pdCreating Pandas index −index = pd.Index([10, 20, 30, 40, 50, 60, 70]) Display the Pandas index −print("Pandas Index...", index)Compute indexer and mask using the "get_indexer. Find the nearest index value if no exact match using the "method" parameter. The value is set "nearest" −print("Get the indexes...", index.get_indexer([30, 25, 58, 50, 69], method="nearest")) ExampleFollowing is the code −import pandas as pd # Creating Pandas index index = pd.Index([10, ...
Read MorePython Pandas - Compute indexer and find the next index value if no exact match
To compute indexer and find the next index value if no exact match, use the index.get_indexer() method. Also set the method parameter to bfill.At first, import the required libraries −import pandas as pdCreating Pandas index −index = pd.Index([10, 20, 30, 40, 50, 60, 70]) Display the Pandas index −print("Pandas Index...", index)Compute indexer and mask using the "get_indexer". Find the next index value if no exact match using the "method" parameter. The value is set "bfill" −print("Get the indexes...", index.get_indexer([30, 25, 58, 50, 55], method="bfill")) ExampleFollowing is the code −import pandas as pd # Creating Pandas index index = pd.Index([10, ...
Read MorePython Pandas - Compute indexer and find the previous index value if no exact match
To compute indexer and find the previous index value if no exact match, use the index.get_indexer() method. Also set the method parameter to ffill.At first, import the required libraries −import pandas as pdCreating Pandas index −index = pd.Index([10, 20, 30, 40, 50, 60, 70]) Display the Pandas index −print("Pandas Index...", index)Compute indexer and mask using the "get_indexer". Find the previous index value if no exact match using the "method" parameter. The value is set "ffill" −print("Get the indexes...", index.get_indexer([30, 20, 75, 80, 50, 59], method="ffill")) ExampleFollowing is the code −import pandas as pd # Creating Pandas index index = ...
Read MorePython Pandas - Determine if two Index objects are equal
To determine if two Index objects are equal, use the equals() method.At first, import the required libraries −import pandas as pdCreating index1 and index2 −index1 = pd.Index([15, 25, 55, 10, 100, 70, 35, 40, 55]) index2 = pd.Index([15, 25, 55, 10, 100, 70, 35, 40, 55])Display the index1 and index2 −print("Pandas Index1...", index1) print("Pandas Index2...", index2)Check whether two index objects are equal −index1.equals(index2) ExampleFollowing is the code −import pandas as pd # Creating index1 and index2 index1 = pd.Index([15, 25, 55, 10, 100, 70, 35, 40, 55]) index2 = pd.Index([15, 25, 55, 10, 100, 70, 35, 40, 55]) ...
Read MorePython Pandas - Get the second component of the Period
To get the second component of the Period, use the period.second property. At first, import the required libraries −import pandas as pdThe pandas.Period represents a period of time. Ccreating two Period objectsperiod1 = pd.Period("2020-09-23 05:55:30") period2 = pd.Period(freq="S", year = 2021, month = 7, day = 16, hour = 2, minute = 35, second = 10)Display the Period objectsprint("Period1...", period1) print("Period2...", period2)Get the seconds from two Period objectsres1 = period1.second res2 = period2.secondExampleFollowing is the code import pandas as pd # The pandas.Period represents a period of time # creating two Period objects period1 = pd.Period("2020-09-23 05:55:30") period2 = ...
Read MorePython Pandas - Get the quarter of the year from Period object
To get the quarter of the year component of the Period, use the period.quarter property. At first, import the required libraries −import pandas as pdThe pandas.Period represents a period of time. Creating two Period objectsperiod1 = pd.Period("2020-02-27 08:32:48") period2 = pd.Period(freq="M", year = 2021, month = 8, day = 16, hour = 2, minute = 35)Display the Period objectsprint("Period1...", period1) print("Period2...", period2)Get the quarter of the year from two Period objectsres1 = period1.quarter res2 = period2.quarterResult is based on the following quarters of an yearQuarter 1 = 1st January to 31st March Quarter 2 = 1st April to 30th June Quarter ...
Read MorePython Pandas - Get the month of the year component of the Period
To get the month of the year component of the Period, use the period.month property. At first, import the required libraries −import pandas as pdThe pandas.Period represents a period of time. Creating two Period objectsperiod1 = pd.Period("2020-09-23 05:55:30") period2 = pd.Period(freq="M", year = 2021, month = 8, day = 16, hour = 2, minute = 35)Display the Period objectsprint("Period1...", period1) print("Period2...", period2)Get the month of the year from two Period objectsres1 = period1.month res2 = period2.monthExampleFollowing is the code import pandas as pd # The pandas.Period represents a period of time # creating two Period objects period1 = pd.Period("2020-09-23 ...
Read MorePython Pandas - Get the minute of the hour component of the Period
To get the minute of the hour component of the Period, use the period.minute property. At first, import the required libraries −import pandas as pdThe pandas.Period represents a period of time. Creating two Period objectsperiod1 = pd.Period("2020-09-23 05:55:30") period2 = pd.Period(freq="T", year = 2021, month = 7, day = 16, hour = 2, minute = 35)Display the Period objectsprint("Period1...", period1) print("Period2...", period2)Get the minute of the hour from two Period objects res1 = period1.minute res2 = period2.minuteExampleFollowing is the code import pandas as pd # The pandas.Period represents a period of time # creating two Period objects period1 = ...
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