A sample script to parse a url with formatting into a list of urls

pythonSampleURLParse.py

#!/usr/bin/env python3
import re

someURL = 'https://someurl.com/[1-10:2]/id/[11-20]/more/{a,b}'

def parseURLList(url):
    urlList = []
    subString = re.search(r"\[(.*?)\]|\{(.*?)\}", url)
    if subString == None:
        urlList.append(url)
        return urlList
    elif subString.group(0).startswith('['):
        parseStep = re.split(":",subString.group(0).strip('[]'))   
        nth = 1
        if len(parseStep) > 1:
            nth = int(parseStep[1])
        parseRange = re.split("-",parseStep[0])   
        start = int(parseRange[0])
        end = int(parseRange[1])
        for x in range(start,end,nth):
            modifiedUrl = re.sub(r"\[(.*?)\]",str(x),url,1)
            urlList += parseURLList(modifiedUrl) or []
    elif subString.group(0).startswith('{'):
        parseElems = re.split(",",subString.group(0).strip('{}'))   
        for x in parseElems:
            modifiedUrl = re.sub(r"\{(.*?)\}",x,url,1)
            urlList += parseURLList(modifiedUrl) or []
    return urlList

myList = parseURLList(someURL)
print(myList)