letter « regex « Python Data Type Q&A

1. In python how to I verify that a string only contains letters, numbers, underscores and dashes?    stackoverflow.com

I know how to do this if I iterate through all of the characters in the string but I am looking for a more elegant method. Thanks

2. How can you extract all 6 letter Latin words to a list?    stackoverflow.com

I need to have all 6 letter Latin words in a list. I would also like to have words which follow the pattern Xyzzyx in a list. I have used ...

3. Regex match even number of letters    stackoverflow.com

Sorry if this is redundant. I need to match an expression in python with regular expressions that only matches even number of letter occurances. For example:

# Even number of A's
AAA # no ...

4. Python: Split a string at uppercase letters    stackoverflow.com

What is the pythonic way to split a string before the occurrences of a given set of characters? For example, I want to split 'TheLongAndWindingRoad' at any occurrence of an uppercase letter (possibly ...

5. Regular expression matching anything greater than eight letters in length, in Python    stackoverflow.com

Despite attempts to master grep and related GNU software, I haven't come close to mastering regular expressions. I do like them, but I find them a bit of an eyesore all ...

6. match two strings with letters in random order in python    stackoverflow.com

if I have 2 strings like:

a = "hello"
b = "olhel"

7. match a paragraph starts with some letter    stackoverflow.com

I have a file that contains paragraphs starting with AB, I wanted to get all these paragraphs, I used the following code, but it returns nothing:

import re
paragraphs = re.findall(r'AB[.\n]+AD',text) #AD ...

8. Python regex help, match anything before meet a letter    stackoverflow.com

Test Cases:

22 s    # 22
1.4 I   # 1.4
4.4.5 Apple    # 4.4.5
1993    # 1993

9. How do I write a regex function in Python that checks if a user has only letters and numbers?    stackoverflow.com

I only want my usernames to have letters, numbers, and underscores. No other symbols, spaces, or anything else. How can I write a regex to check if it's only letters/numbers/underscores?

10. Python regex match letter sequences    stackoverflow.com

I want to make a regex to match "AGGH", "TIIK", "6^^?" or whatever but not "AGGA", "ABCD". Basically its the pattern of letters which matters. Is there a way to ask ...

11. Match any unicode letter?    stackoverflow.com

In .net you can use \p{L} to match any letter, how can I do the same in Python? Namely, I want to match any uppercase, lowercase, and accented letters.

12. Python remove anything that is not a letter or number    stackoverflow.com

I'm having a little trouble with Python regular expressions. What is a good way to remove all characters in a string that are not letters or numbers? Thanks!

13. Separate number/letter tokens in Python    stackoverflow.com

I'm using re.split() to separate a string into tokens. Currently the pattern I'm using as the argument is [^\dA-Za-z], which retrieves alphanumeric tokens from the string. However, what I need is ...

14. Regular expression to match 3 capital letters followed by a small letter followed by 3 capital letters?    stackoverflow.com

I need a regular expression in python which matches exactly 3 capital letters followed by a small letter followed by exactly 3 capital letters. For example, it should match ASDfGHJ and not ...

15. Matching string of numbers and letters and of a specific length    stackoverflow.com

So I have this exercise and can't solve it: I can only accept a string, if it's constructed of numbers AND letters, has to contain at least one of both; and it ...

16. Match letter in any language    stackoverflow.com

How can I match a letter from any language using a regex in python 3? re.match([a-zA-Z]) will match the english language characters but I want all languages to be supported simultaneously. I ...