Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://www.tutorialspoint.com/python/python_itertools_pairwise_function.htm below:

Python itertools.pairwise() Function

The Python itertools.pairwise() function is used to create an iterator that returns consecutive overlapping pairs from an iterable. It is useful for analyzing sequential relationships between elements in a dataset.

This function is equivalent to using the zip function with a slice of the original iterable.

Following is the syntax of the Python itertools.pairwise() function −

itertools.pairwise(iterable)

This function accepts the input iterable as a parameter from which consecutive pairs will be extracted.

This function returns an iterator that yields tuples containing consecutive elements from the input iterable.

Following is an example of the Python itertools.pairwise() function. Here, we extract consecutive pairs from a list of numbers −

import itertools

numbers = [1, 2, 3, 4, 5]
pairs = itertools.pairwise(numbers)
for pair in pairs:
   print(pair)

Following is the output of the above code −

(1, 2)
(2, 3)
(3, 4)
(4, 5)

Here, we use itertools.pairwise() function on a string to generate consecutive character pairs −

import itertools

text = "HELLO"
pairs = itertools.pairwise(text)
for pair in pairs:
   print(pair)

Output of the above code is as follows −

('H', 'E')
('E', 'L')
('L', 'L')
('L', 'O')

Now, we use itertools.pairwise() function to analyze temperature differences between consecutive days −

import itertools

temperatures = [72, 75, 78, 74, 70, 69]
differences = [(b - a) for a, b in itertools.pairwise(temperatures)]
print(differences)

The result obtained is as shown below −

[3, 3, -4, -4, -1]

We can also use the itertools.pairwise() function to check for increasing trends in stock prices −

import itertools

stock_prices = [100, 102, 101, 105, 107, 106]
increasing_trend = [b > a for a, b in itertools.pairwise(stock_prices)]
print(increasing_trend)

The result produced is as follows −

[True, False, True, True, False]

python_modules

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4