Python Extract words from a given string

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Method # 1: Using split()
Using the split function, we can split a string into a list of words, and this is the most common and recommended method if someone wants to complete this specific task. But the downside is that it doesn’t work in cases where the string contains punctuation marks.

# Python3 code to demonstrate
# to extract words from string
# using split()

# initializing string
test_string = "Python.Engineering is best Computer Science Portal"

# printing original string
print ("The original string is : " + test_string)

# using split()
# to extract words from string
res = test_string.split()

# printing result
print ("The list of words is : " + str(res))

Output:

The original string is: Python.Engineering is best Computer Science Portal
The list of words is: [’Python.Engineering’,’ is’, ’best’, ’Computer’, ’Science’, ’Portal’]

How to extract a word from a string in Python

How to extract a word from a string in Python

Method # 2: Using regex (findall ())
In cases that contain all special characters and punctuation marks, as discussed above, tr The traditional method of searching for words in a string using splitting can fail and therefore requires regular expressions to accomplish this task. The findall function returns a list after filtering the string and extracting words, ignoring punctuation marks.

# Python3 code to demonstrate
# to extract words from string
# using regex( findall() )
import re

# initializing string
test_string = "Python.Engineering, is best @# Computer Science Portal.!!!"

# printing original string
print ("The original string is : " + test_string)

# using regex( findall() )
# to extract words from string
res = re.findall(r’w+’, test_string)

# printing result
print ("The list of words is : " + str(res))

Output:

The original string is: Python.Engineering, is best @ # Computer Science Portal. !!!
The list of words is: [’Python.Engineering’, ’is’, ’best’, ’Co mputer ’,’ Science ’,’ Portal ’]

>Extracting a word from a string in Python

Method # 3: Using regex () + string.punctuation
This method also used regular expressions, but the get all punctuation string function is used to ignore all punctuation and get the filtered result string.

# Python3 code to demonstrate
# to extract words from string
# using regex() + string.punctuation
import re
import string

# initializing string
test_string = "Python.Engineering, is best @# Computer Science Portal.!!!"

# printing original string
print ("The original string is : " + test_string)

# using regex() + string.punctuation
# to extract words from string
res = re.sub(’[’+string.punctuation+’]’, ’’, test_string).split()

# printing result
print ("The list of words is : " + str(res))

Output:

The list of words is: [’Python.Engineering’, ’is’, ’best’, ’Computer’, ’Science’, ’Portal’]

Getting the first word from a string

I study Python, there is a problem - to receive the first word from a line. The string may start with spaces, dots, etc. ("….example, strings"). We need a function that will return the word "example". My code in which I managed to get the word, but I can’t get rid of the comma:

will print "Hello", but if the string is "Hello, world" then it will print "world"

In this approach, all words will be found:

>>> import re
>>> word = ’.... example, string’
>>> pattern = re.compile(r’w+’)
>>> pattern.findall(word)[0]
’example’


In this, only the first match:

>>> pattern.search(word).group()
’example’


Example without regular expressions:

>>> for i in word:
...     if not i.isalpha() and i != ’ ’:
...             word = word.replace(i, ’’)
...
>>> word
’ example string’
>>> word.split()[0].strip()
’example’

👻 Read also: what is the best laptop for engineering students?

We hope this article has helped you to resolve the problem. Apart from Python Extract words from a given string, check other code Python module-related topics.

Want to excel in Python? See our review of the best Python online courses 2023. If you are interested in Data Science, check also how to learn programming in R.

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Davies Krasiko

Warsaw | 2023-01-28

io Python module is always a bit confusing 😭 Python Extract words from a given string is not the only problem I encountered. I am just not quite sure it is the best method

Carlo Nickolson

Munchen | 2023-01-28

Maybe there are another answers? What Python Extract words from a given string exactly means?. Checked yesterday, it works!

Carlo Williams

Tallinn | 2023-01-28

os Python module is always a bit confusing 😭 Python Extract words from a given string is not the only problem I encountered. Will use it in my bachelor thesis

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