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I would like to know if there is a library that will tell me approximately how similar two strings are
I am not looking for anything specific, but in this case:
a = 'alex is a buff dude'
b = 'a;exx is a buff dud'
we could say that b and a are approximately 90% similar.
Is there a library which can do this?
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Python comparison operators can be used to compare strings in Python. These operators are: equal to ( == ), not equal to ( != ), greater than ( > ), less than ( < ), less than or equal to ( <= ), and greater than or equal to ( >= ).
You should not use == (equality operator) to compare these strings because they compare the reference of the string, i.e. whether they are the same object or not. On the other hand, equals() method compares whether the value of the strings is equal, and not the object itself.
Python sort() method and == operator to compare lists We can club the Python sort() method with the == operator to compare two lists. Python sort() method is used to sort the input lists with a purpose that if the two input lists are equal, then the elements would reside at the same index positions.
Python String Comparison operators In python language, we can compare two strings such as identify whether the two strings are equivalent to each other or not, or even which string is greater or smaller than each other.
import difflib
>>> a = 'alex is a buff dude'
>>> b = 'a;exx is a buff dud'
>>> difflib.SequenceMatcher(None, a, b).ratio()
0.89473684210526316
http://en.wikipedia.org/wiki/Levenshtein_distance
There are a few libraries on pypi, but be aware that this is expensive, especially for longer strings.
You may also want to check out python's difflib: http://docs.python.org/library/difflib.html
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