017

017/.gitignore

@@ -0,0 +1 @@
+recently-added.rss

017/safari.py

@@ -0,0 +1,71 @@
+from datetime import datetime, timedelta
+import os
+import socket
+import ssl
+import sys
+from urllib.request import urlopen
+from xml.etree.ElementTree import parse
+
+cwd = os.getcwd()
+project_root = os.path.dirname(cwd)
+sys.path.append(project_root)
+
+from common.twitter_config import tweet_status
+
+GO_BACK = timedelta(days=1)
+NOW = datetime.now()
+RSS = 'https://www.safaribooksonline.com/feeds/recently-added.rss'
+LOCAL = 'MacBook' in socket.gethostname()
+TWEET = 'New on @safari: {} - {}'
+
+
+def get_tweets(greps=['Python']):
+
+    doc = get_rss_feed()
+
+    # Python cookbook 3rd ed
+    for item in doc.iterfind('channel/item'):
+        title = item.findtext('title')
+        date = item.findtext('pubDate')[:-6]
+        dt = datetime.strptime(date, '%a, %d %b %Y %H:%M:%S')
+        link = item.findtext('link')
+        category = item.findtext('category')
+
+        if (NOW - dt) > GO_BACK:
+            continue
+
+        if not any(g.lower() in title.lower()
+                   or g.lower() in category.lower()
+                   for g in greps):
+            continue
+
+        title = ' '.join(gen_hashtags(title, greps))
+        yield TWEET.format(title, link)
+
+
+def get_rss_feed():
+    if LOCAL:
+        with open('recently-added.rss') as f:
+            return parse(f)
+    else:
+        # work around SSL: CERTIFICATE_VERIFY_FAILED
+        context = ssl._create_unverified_context()
+        u = urlopen(RSS, context=context)
+        return parse(u)
+
+
+def gen_hashtags(title, greps):
+    for word in title.split():
+        if any(g.lower() == word.lower() for g in greps):
+            yield '#' + word
+        else:
+            yield word
+
+
+if __name__ == '__main__':
+
+    for tweet in get_tweets():
+        if LOCAL:
+            print(tweet)
+        else:
+            tweet_status(tweet)

LOG.md

@@ -18,7 +18,7 @@
 | 014 | Apr 12, 2017 | [script to automatically tweet out new @lynda (#Python) titles](014) | feedparser is awesome. Want to run it with filter on Python. Abstracted twitter config away in repo's common dir (re-use). |
 | 015 | Apr 13, 2017 | [script to calculate the number of posts on @pybites](015) | small script but some interesting things: urllib.request.urlretrieve (stdlib), test and cache option (using os.start for cache file age), re.findall, dict comprehension. |
 | 016 | Apr 14, 2017 | [TITLE](016) | LEARNING |
-| 017 | Apr 15, 2017 | [TITLE](017) | LEARNING |
+| 017 | Apr 15, 2017 | [script to automatically tweet out new @safari Python titles](017) | like the Lynda one, parsing an RSS feed, but only stdlib, so no feedparser, using xml.etree.ElementTree, no requests, using urllib. Also nice exercise converting and calculating with datetime / timedelta |
 | 018 | Apr 16, 2017 | [TITLE](018) | LEARNING |
 | 019 | Apr 17, 2017 | [TITLE](019) | LEARNING |
 | 020 | Apr 18, 2017 | [TITLE](020) | LEARNING |