Remove special character from set of values in Python

user_13925892 0
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I want to remove a special character from a set of string values in Python.

I apply the below-mentioned logic.

I'm getting the exact output I wanted, but can anyone help me with a short and more convenient approach?

job = {'job', 'entrepreneur', 'student', 'services', 'housemaid', 'management', 'self- 
employed','admin.', 'blue-collar', 'technician'}
#print(job)
job_copy = set()
val = ''
for j in job:
  if j.isalnum():
    job_copy.add(j)
  else:
    for char in j:
        if char.isalnum():
            val = val+char
    job_copy.add(val)
    val = ''
print(job_copy)

OUTPUT

{'technician', 'housemaid', 'selfemployed', 'entrepreneur', 'job', 'services', 'admin', 'management', 'student', 'bluecollar'}
special-characters python
3 Answers

Here is a shorter solution:

{re.sub('[^A-Za-z]+', '', s) for s in job}

For each string s in job we substitute any special character (i.e. not an uppercase or lowercase letter) by an empty character.

user_47215700

Use regex and comprehension:

import re
output = set([re.sub('[^A-ZÜÖÄa-z0-9]+', '', s) for s in job])
user_120181910

To make the code short and easy to follow along, you can simply use regular expression i.e re module in Python.
And if you haven't been introduced to regular expression before, I will suggest you read this tutorial by real python.

To capture any non-alphanumeric character in the string and replace it with an empty string (""), one can simply use "\W" expression which is the same as [^a-zA-Z0-9_] or [^\w] in the re.sub() method which can be used to substitute a regex pattern in a string with something else.

The code can be rewritten to this;

import re

job = {'job', 'entrepreneur', 'student', 'services', 'housemaid', 'management', 'self-employed','admin.', 'blue-collar', 'technician'}

job_copy = {re.sub(r'\W', '', j) for j in job}

print(job_copy)

Output

{'technician', 'student', 'management', 'bluecollar', 'job', 'services', 'selfemployed', 'housemaid', 'entrepreneur', 'admin'}
user_135820840
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