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Technical articles with clear explanations and examples
Python Pandas - Convert given Timestamp to Period
To convert a given Timestamp to Period in Pandas, use the timestamp.to_period() method. The freq parameter sets the frequency for the period conversion. Syntax timestamp.to_period(freq=None) Parameters freq − Frequency string (e.g., 'D' for daily, 'M' for monthly, 'Y' for yearly) Basic Example Here's how to convert a timestamp to a monthly period − import pandas as pd # Create a timestamp object timestamp = pd.Timestamp('2021-09-14T15:12:34.261811624') # Display the original timestamp print("Original Timestamp:") print(timestamp) # Convert timestamp to monthly period monthly_period = timestamp.to_period(freq='M') print("Converted to Monthly Period:") print(monthly_period) ...
Read MorePython Pandas - Construct an IntervalArray from an array-like of tuples
The pandas.arrays.IntervalArray is a specialized array for storing intervals. You can construct an IntervalArray from an array-like of tuples using the from_tuples() method. This is useful when working with ranges, bins, or any data that represents intervals. Basic Syntax pandas.arrays.IntervalArray.from_tuples(data, closed='right', copy=False, dtype=None) Creating IntervalArray from Tuples Let's create an IntervalArray from tuples representing different intervals ? import pandas as pd # Construct a new IntervalArray from an array-like of tuples array = pd.arrays.IntervalArray.from_tuples([(10, 25), (15, 70), (30, 50)]) # Display the IntervalArray print("Our IntervalArray...") print(array) Our ...
Read MorePython Pandas - Check if the Intervals in the IntervalArray is empty
To check if the intervals in the IntervalArray are empty, use the is_empty property in Pandas. An interval is considered empty when it has zero length, which occurs when the left and right boundaries are equal in an open interval. What are Empty Intervals? An empty interval occurs when: The left and right boundaries are equal The interval is open (closed='neither') This results in zero length Creating IntervalArray with Empty and Non-Empty Intervals Let's create an IntervalArray containing both empty and non-empty intervals : import pandas as pd # Create intervals ...
Read MorePython Pandas - Return an Index with entries denoting the length of each Interval in the IntervalArray
To return an Index with entries denoting the length of each Interval in the IntervalArray, use the array.length property in Pandas. Understanding IntervalArray An IntervalArray is a Pandas data structure that holds an array of intervals. Each interval has a start point, end point, and closure type (whether endpoints are included). Creating Individual Intervals First, let's create individual Interval objects with closed intervals ? import pandas as pd # Create two Interval objects # Closed intervals set using the "closed" parameter with value "both" interval1 = pd.Interval(50, 75, closed='both') interval2 = pd.Interval(65, 95, ...
Read MorePython Pandas - Return the midpoint of each Interval in the IntervalArray as an Index
To return the midpoint of each Interval in the IntervalArray as an Index, use the array.mid property. This property calculates the center point of each interval by taking the average of the left and right endpoints. Syntax IntervalArray.mid This property returns an Index containing the midpoint values of each interval. Creating IntervalArray First, import the required libraries and create Interval objects ? import pandas as pd # Create two Interval objects # Closed intervals set using the "closed" parameter with value "both" interval1 = pd.Interval(50, 75, closed='both') interval2 = pd.Interval(65, ...
Read MorePython Pandas - Return the right endpoints of each Interval in the IntervalArray as an Index
To return the right endpoints of each Interval in the IntervalArray as an Index, use the array.right property. This property extracts the right boundary values from all intervals in the array. What is an IntervalArray? An IntervalArray is a pandas data structure that holds multiple Interval objects. Each interval represents a range with left and right boundaries, typically in the format (left, right]. Creating IntervalArray and Getting Right Endpoints Let's create an IntervalArray and extract the right endpoints ? import pandas as pd # Create two Interval objects interval1 = pd.Interval(10, 25) interval2 ...
Read Morepython Pandas - Return the left endpoints of each Interval in the IntervalArray as an Index
To return the left endpoints of each Interval in the IntervalArray as an Index, use the array.left property. This property extracts the starting values of each interval and returns them as a pandas Index object. What is an IntervalArray? An IntervalArray is a pandas data structure that holds an array of Interval objects. Each interval represents a range between two values with defined boundaries (open or closed). Creating IntervalArray and Getting Left Endpoints Let's create an IntervalArray and extract the left endpoints using the left property − import pandas as pd # Create ...
Read MorePython - Create a Pandas array for interval data
To create a Pandas array for interval data, use the pandas.arrays.IntervalArray() method. This creates an array structure specifically designed to handle interval data with defined start and end points. Creating Individual Intervals First, let's create individual Interval objects using pd.Interval() ? import pandas as pd # Create two Interval objects interval1 = pd.Interval(10, 30) interval2 = pd.Interval(30, 70) # Display the intervals print("Interval1...") print(interval1) print("Interval2...") print(interval2) Interval1... (10, 30] Interval2... (30, 70] Creating IntervalArray Now we can construct an IntervalArray from these Interval objects and explore its properties ...
Read MorePython Pandas - Get the right bound for the interval
In Pandas, an Interval represents a range between two bounds. To get the right bound of an interval, use the interval.right property. This is useful when working with time ranges or numeric intervals. Syntax interval.right Creating a Time Interval First, let's create a time interval using timestamps ? import pandas as pd # Create a time interval using Timestamps interval = pd.Interval(pd.Timestamp('2020-01-01 00:00:00'), pd.Timestamp('2021-01-01 00:00:00'), ...
Read MoreProgram to count indices pairs for which elements sum is power of 2 in Python
Given a list of numbers, we need to find the number of index pairs (i, j) where i < j such that nums[i] + nums[j] equals a power of 2 (2^k for some k ≥ 0). Problem Understanding For the input nums = [1, 2, 6, 3, 5], we have three valid pairs: (6, 2): sum is 8 = 2^3 (5, 3): sum is 8 = 2^3 (1, 3): sum is 4 = 2^2 Algorithm Approach We use a frequency counter to track elements we've seen. For each element x, we check if ...
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