Python: Find the string similarity between two given strings
Python String: Exercise-92 with Solution
Write a Python program to find the string similarity between two given strings.
From Wikipedia:
In computer science, approximate string matching (often colloquially referred to as fuzzy string searching) is the technique of finding strings that match a pattern approximately (rather than exactly).
Sample Solution:-
Python Code:
import difflib
def string_similarity(str1, str2):
result = difflib.SequenceMatcher(a=str1.lower(), b=str2.lower())
return result.ratio()
str1 = 'Python Exercises'
str2 = 'Python Exercises'
print("Original string:")
print(str1)
print(str2)
print("Similarity between two said strings:")
print(string_similarity(str1,str2))
str1 = 'Python Exercises'
str2 = 'Python Exercise'
print("\nOriginal string:")
print(str1)
print(str2)
print("Similarity between two said strings:")
print(string_similarity(str1,str2))
str1 = 'Python Exercises'
str2 = 'Python Ex.'
print("\nOriginal string:")
print(str1)
print(str2)
print("Similarity between two said strings:")
print(string_similarity(str1,str2))
str1 = 'Python Exercises'
str2 = 'Python'
print("\nOriginal string:")
print(str1)
print(str2)
print("Similarity between two said strings:")
print(string_similarity(str1,str2))
str1 = 'Python Exercises'
str1 = 'Java Exercises'
print("\nOriginal string:")
print(str1)
print(str2)
print("Similarity between two said strings:")
print(string_similarity(str1,str2))
Sample Output:
Original string: Python Exercises Python Exercises Similarity between two said strings: 1.0 Original string: Python Exercises Python Exercise Similarity between two said strings: 0.967741935483871 Original string: Python Exercises Python Ex. Similarity between two said strings: 0.6923076923076923 Original string: Python Exercises Python Similarity between two said strings: 0.5454545454545454 Original string: Java Exercises Python Similarity between two said strings: 0.0
Flowchart:

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Previous: Write a Python program to convert a given heterogeneous list of scalars into a string.
Next: Write a Python program to extract numbers from a given string.
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Python: Tips of the Day
Check if a given key already exists in a dictionary:
In is the intended way to test for the existence of a key in a dict.
d = {"key1": 10, "key2": 23} if "key1" in d: print("this will execute") if "nonexistent key" in d: print("this will not")
If you wanted a default, you can always use dict.get():
d = dict() for i in range(100): key = i % 10 d[key] = d.get(key, 0) + 1
and if you wanted to always ensure a default value for any key you can either use dict.setdefault() repeatedly or defaultdict from the collections module, like so:
from collections import defaultdict d = defaultdict(int) for i in range(100): d[i % 10] += 1
but in general, the in keyword is the best way to do it.
Ref: https://bit.ly/2XPMRyz
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