validation « regex « Python Data Type Q&A

1. Regex in python    stackoverflow.com

I'm trying to use regular expression right now and I'm really confuse. I want to make some validation with this regular expression :

^[A-Za-z0-9_.][A-Za-z0-9_ ]*

2. python regular expression to validate types of strings    stackoverflow.com

I want to do the following with python:

1. Validate if a UTF8 string is an integer.
2. Validate if a UTF8 string is a float.
3. Validate if a UTF8 string is of length(1-255).
4. Validate if a ...

3. ssh-rsa public key validation using a regular expression    stackoverflow.com

What regular expression can I use (if any) to validate that a given string is a legal ssh rsa public key? I only need to validate the actual key - I don't ...

4. validate hostname string in Python    stackoverflow.com

Following up to Regular expression to match hostname or IP Address? and using Restrictions on valid host names as a reference, what is the most readable, concise way to ...

5. Regular expression works normally, but fails when placed in an XML schema    stackoverflow.com

I have a simple doc.xml file which contains a single root element with a Timestamp attribute:

<?xml version="1.0" encoding="utf-8"?>
<root Timestamp="04-21-2010 16:00:19.000" />

6. python validate text    stackoverflow.com

I need to check that text contain only small letters a-z and , best way to do it in python?

7. Validate a name in Python    stackoverflow.com

For an internationalised project, I have to validate the global syntax for a name (first, last) with Python. But the lack of unicode classes support is really maling things harder. Is there ...

8. How to remove unsafe characters to save file    stackoverflow.com

I would like to save a file with the name that has the most valid characters remaining intact, f.e. if I get supplied the filename: >This\ ?wesomé_Song?©.mp3 and I want to ...

9. Regular expression for validating year starting from 2020    stackoverflow.com

I am writing a regular expression to validate year starting from 2020. The below is the regular expression I wrote,

^(20-99)(20-99)$