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Python Articles
Page 374 of 852
Python Pandas - Create an Index based on an underlying Categorical
To create an Index based on an underlying Categorical, use the pandas.CategoricalIndex() method.At first, import the required libraries −import pandas as pdCategoricalIndex is the Index based on an underlying Categorical. CategoricalIndex can only take on a limited, and usually fixed, number of possible values. Set the categories for the categorical using the "categories" parameter. Treat the categorical as ordered using the "ordered" parameter −catIndex = pd.CategoricalIndex( ["p", "q", "r", "s", "p", "q", "r", "s"], ordered=True, categories=["p", "q", "r", "s"] )Display the Categorical Index −print("Categorical Index...", catIndex)Get the categories −print("DisplayingCategories from CategoricalIndex...", catIndex.categories)ExampleFollowing is the code −import pandas as pd ...
Read MoreProgram to find minimum time required to complete tasks with k time gap between same type tasks in Python
Suppose we have a list of integers called tasks where each item represents a different task type, we also have a non-negative integer say k. Each task takes one unit of time to complete and the tasks must be completed in correct order, but we must have k units of time between doing two same type tasks. At any time, either we can do a task or wait. We have to find the amount of time it takes to complete all the tasks.So, if the input is like tasks = [0, 1, 1, 2] k = 2, then the output ...
Read MorePython Pandas - Display the value of the step parameter of RangeIndex
To display the value of the step parameter of RangeIndex, use the index.step property in Pandas.At first, import the required libraries −import pandas as pdRangeIndex is a memory-saving special case of Int64Index limited to representing monotonic ranges. Create a range index with start, stop and step. The name is the name to be stored in the index.index = pd.RangeIndex(start=10, stop=30, step=2, name="data") Display the step parameter value −print("RangeIndex step value...", index.step)ExampleFollowing is the code −import pandas as pd # RangeIndex is a memory-saving special case of Int64Index limited to representing monotonic ranges. # Create a range index with start, ...
Read MorePython Pandas - Display the value of the stop parameter of RangeIndex
To display the value of the stop parameter of RangeIndex, use the index.stop property in Pandas.At first, import the required libraries −import pandas as pdRangeIndex is a memory-saving special case of Int64Index limited to representing monotonic ranges. Create a range index with start, stop and step. The name is the name to be stored in the index.index = pd.RangeIndex(start=5, stop=20, step=2, name="data") Display the RangeIndex −print("RangeIndex...", index)Display the stop parameter value −print("RangeIndex stop value...", index.stop) ExampleFollowing is the code −import pandas as pd # RangeIndex is a memory-saving special case of Int64Index limited to representing monotonic ranges. # Using ...
Read MoreProgram to find array by swapping consecutive index pairs in Python
Suppose we have a list of numbers called nums, we have to return the list by swapping each consecutive even indexes with each other, and swapping each consecutive odd indexes with each other.So, if the input is like nums = [8, 5, 3, 4, 8, 9, 3, 6, 4, 7], then the output will be [3, 4, 8, 5, 3, 6, 8, 9, 4, 7]To solve this, we will follow these steps −for i in range 0 to size of nums - 2, increase by 4, doif i + 2 < size of nums, thenswap nums[i] and nums[i + 2]if ...
Read MorePython Pandas - Display the value of the start parameter of RangeIndex
To display the value of the start parameter of RangeIndex, use the index.start property in Pandas. At first, import the required libraries −import pandas as pdRangeIndex is a memory-saving special case of Int64Index limited to representing monotonic ranges. Using RangeIndex may in some instances improve computing speed. Create a range index with start, stop and step. The name is the name to be stored in the index.index = pd.RangeIndex(start=5, stop=20, step=2, name="data") Display the RangeIndex −print("RangeIndex...", index)Display the start parameter value −print("RangeIndex start value...", index.start) ExampleFollowing is the code −import pandas as pd # Create a range index with ...
Read MorePython Pandas - How to create a RangeIndex
To create a RangeIndex, use the pandas.RangeIndex() method in Pandas. At first, import the required libraries −import pandas as pdRangeIndex is a memory-saving special case of Int64Index limited to representing monotonic ranges. Using RangeIndex may in some instances improve computing speed.Create a range index with start, stop and step. The name is the name to be stored in the index −index = pd.RangeIndex(start=10, stop=30, step=2, name="data") Display the start parameter value −print("RangeIndex start value...", index.start)Display the stop parameter value −print("RangeIndex stop value...", index.stop) Display the step parameter value −print("RangeIndex step value...", index.step)ExampleFollowing is the code −import pandas as pd ...
Read MorePython Pandas - Compute slice locations for input labels
To compute slice locations for input labels, use the index.slice_locs() method. At first, import the required libraries −import pandas as pdCreate Pandas index object −index = pd.Index(list('pqrstuvwxyz')) Display the Pandas index −print("Pandas Index...", index)Get the slice locations. The "start" is the label to begin with. The "end" is the label to end withprint("The slice locations with start and stop...", index.slice_locs(start='q', end='v')) ExampleFollowing is the code −import pandas as pd # Create Pandas index object index = pd.Index(list('pqrstuvwxyz')) # Display the Pandas index print("Pandas Index...", index) # Return the number of elements in the Index print("Number of elements ...
Read MoreProgram to check sum of two numbers is up to k from sorted List or not in Python
Suppose we have a list of numbers called nums and the elements in nums are sorted in ascending order. We also have another value k, we have to check whether any two elements taken from the list add up to k or not. The numbers can also be negative or 0. We have to solve this problem in constant amount of space usage.So, if the input is like nums = [-8, -3, 2, 7, 9] k = 4, then the output will be True, because if we take 7 and -3, then the sum is 7 + (-3) = 4, ...
Read MoreProgram to find sum of two numbers which are less than the target in Python
Suppose we have a list of numbers called nums and also have a target value, we have to find the sum of the largest pair of numbers in nums whose sum is at most (target-1).So, if the input is like nums = [8, 3, 4, 9, 2] target = 8, then the output will be 7, because the sum of the largest pair of numbers less than 8 is 4 + 3 = 7.To solve this, we will follow these steps −sort the list numsp1 := 0p2 := size of nums - 1m := -infwhile p1 < p2, doif nums[p1] ...
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