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Python: Bigrams of words in a given list of strings

Python List: Exercise - 184 with Solution

Write a Python program to form Bigrams of words in a given list of strings.

From Wikipedia:
A bigram or digram is a sequence of two adjacent elements from a string of tokens, which are typically letters, syllables, or words. A bigram is an n-gram for n=2. The frequency distribution of every bigram in a string is commonly used for simple statistical analysis of text in many applications, including in computational linguistics, cryptography, speech recognition, and so on.

Sample Solution:

Python Code:

def bigram_sequence(text_lst):
    result = [a for ls in text_lst for a in zip(ls.split(" ")[:-1], ls.split(" ")[1:])]
    return result
text = ["Sum all the items in a list", "Find the second smallest number in a list"]
print("Original list:")
print(text)
print("\nBigram sequence of the said list:")
print(bigram_sequence(text))

Sample Output:

Original list:
['Sum all the items in a list', 'Find the second smallest number in a list']

Bigram sequence of the said list:
[('Sum', 'all'), ('all', 'the'), ('the', 'items'), ('items', 'in'), ('in', 'a'), ('a', 'list'), ('Find', 'the'), ('the', 'second'), ('second', 'smallest'), ('smallest', 'number'), ('number', 'in'), ('in', 'a'), ('a', 'list')]

Flowchart:

Flowchart: Bigrams of words in a given list of strings.

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Python Code Editor:

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m