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I want to find words that appear after a keyword (specified and searched by me) and print out the result. I know that i am suppose to use regex to do it, and i tried it out too, like this:
import re s = "hi my name is ryan, and i am new to python and would like to learn more" m = re.search("^name: (\w+)", s) print m.groups() The output is just:
"is" But I want to get all the words and punctuations that comes after the word "name".
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Method #1 : Using split() Using the split function, we can split the string into a list of words and this is the most generic and recommended method if one wished to accomplish this particular task. But the drawback is that it fails in cases the string contains punctuation marks.
The re.search() and re. match() both are functions of re module in python. These functions are very efficient and fast for searching in strings. The function searches for some substring in a string and returns a match object if found, else it returns none. There is a difference between the use of both functions.
Given List of strings, extract all the words that are keywords. Explanation : All strings in result list is valid Python keyword. Explanation : try is used in try/except block, hence a keyword. This is one of the ways in which this task can be performed. In this, we check for keyword using iskeyword () and convert a string to words using split ().
Explanation : All strings in result list is valid Python keyword. Explanation : try is used in try/except block, hence a keyword. This is one of the ways in which this task can be performed. In this, we check for keyword using iskeyword () and convert a string to words using split ().
Keywords are the terms that represent the most relevant information contained in the document. Methods for automatic keyword extraction can be supervised, semi-supervised, or unsupervised. In research & news articles, keywords form an important component since they provide a concise representation of the article’s content.
Extract word from your text data using Python’s built in Regular Expression Module. Regular expression (RegEx) is an extremely powerful tool for processing and extracting character patterns from text. Regular Expressions are fast and helps you to avoid using unnecessary loops in your program to match and extract desired information.
Instead of using regexes you could just (for example) separate your string with str.partition(separator) like this:
mystring = "hi my name is ryan, and i am new to python and would like to learn more" keyword = 'name' before_keyword, keyword, after_keyword = mystring.partition(keyword) >>> before_keyword 'hi my ' >>> keyword 'name' >>> after_keyword ' is ryan, and i am new to python and would like to learn more' You have to deal with the needless whitespaces separately, though.
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Your example will not work, but as I understand the idea:
regexp = re.compile("name(.*)$") print regexp.search(s).group(1) # prints " is ryan, and i am new to python and would like to learn more" This will print all after "name" and till end of the line.
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