') + ')', 'gi'); if (regex.test(text)) { found = true; var frag = document.createDocumentFragment(); var parts = text.split(regex); parts.forEach(function(part, i) { if (i % 2 === 0) { frag.appendChild(document.createTextNode(part)); } else { var span = document.createElement('span'); span.className = 'userscript-highlight'; span.textContent = part; frag.appendChild(span); } }); node.parentNode.replaceChild(frag, node); } }); } else if (node.nodeType === 1 && node.childNodes) { // element var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT']; if (!skipTags.includes(node.tagName)) { Array.from(node.childNodes).forEach(highlight); } } } highlight(document.body); // Re-highlight on dynamic content var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1 || node.nodeType === 3) highlight(node); }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ', 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + ', 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ', 'i'); if (__m === '*' || __re.test(location.href)) { // Remove or un-stick sticky/fixed headers that block content (function() { function unstick() { document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) { if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') { el.style.position = 'static'; el.style.top = 'auto'; el.style.zIndex = 'auto'; } }); } unstick(); var observer = new MutationObserver(unstick); observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] }); })(); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); })(); NotesIndex/PythonChallenge.md at master · wilbeibi/NotesIndex · GitHub
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Python Challenge

Level 0

In [21]: 1<<38
Out[21]: 274877906944

Level 1

# src:http://www.pythonchallenge.com/pc/def/map.html
from string import maketrans
ori = 'abcdefghijklmnopqrstuvwxyz'
des = 'cdefghijklmnopqrstuvwxyzab'
tbl = maketrans(ori, des)
text = "g fmnc wms bgblr rpylqjyrc gr zw fylb. rfyrq ufyr amknsrcpq ypc dmp. \
bmgle gr gl zw fylb gq glcddgagclr ylb rfyr'q ufw rfgq rcvr gq qm jmle. \
sqgle qrpgle.kyicrpylq() gq pcamkkclbcb. lmu ynnjw ml rfc spj."
print text.translate(tbl)
# So, the answer is:
print 'map'.translate(tbl)
# Output: ocr

Level 2

#src http://www.pythonchallenge.com/pc/def/ocr.html
import requests
import re
rep = requests.get("http://www.pythonchallenge.com/pc/def/ocr.html")
html = rep.text
html = ''.join(html.split()) # strip all newline, tab, space
text = re.findall(r'<!--(.*?)-->', html)[1] # get the second comment
wc = {}
for i in text:
wc[i] = 1 if i not in wc else wc[i]+1
l = [i for i in wc if wc[i]==1]
# retrive answer in text in order
print ''.join(i for i in text if i in l)
# Output: equality

Level 3

#src: http://www.pythonchallenge.com/pc/def/equality.html
import requests
import re
rep = requests.get("http://www.pythonchallenge.com/pc/def/equality.html")
html = rep.text
html = ''.join(html.split()) text = re.findall(r'<!--(.*?)-->', html)[0] res = re.findall(r'[^A-Z][A-Z]{3}([a-z])[A-Z]{3}[^A-Z]', text)
print ''.join(res) # Output: linkedlist

Level 4

# src: http://www.pythonchallenge.com/pc/def/linkedlist.php?nothing=12345
import urllib2
import re
link = "http://www.pythonchallenge.com/pc/def/linkedlist.php?nothing=12345"
# link = "http://www.pythonchallenge.com/pc/def/linkedlist.php?nothing=8022"
for i in range(400):
text = urllib2.urlopen(link).read()
num = re.findall(r"and the next nothing is (\d+)", text)[0]
link = re.sub('\d+',num, link)
print num + "\t" + link
# Output: peak.html

Level 5

# src: http://www.pythonchallenge.com/pc/def/peak.html
import cPickle as pickle
import urllib2
import re
link = "http://www.pythonchallenge.com/pc/def/banner.p"
text = urllib2.urlopen(link).read()
data = pickle.loads(text)
for line in data:
print ''.join(i[0]*i[1] for i in line)
# Output: channel