036

036/.gitignore

@@ -0,0 +1 @@
+data

036/cache.py

@@ -0,0 +1,45 @@
+from collections import defaultdict
+from datetime import datetime
+import pickle
+from random import choice
+
+CACHE = 'data'
+NAMES = ('bob', 'julian', 'martin', 'dante', 'snake')
+TIMES = range(15, 61, 15)
+
+
+def gen_random_entry():
+    while True:
+        yield datetime.now(), choice(NAMES), choice(TIMES)
+
+
+class Cache:
+
+    def __enter__(self):
+        try:
+            self.cache = pickle.load(open(CACHE, "rb"))
+        except FileNotFoundError:
+            self.cache = defaultdict(list)
+        return self.cache
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        pickle.dump(self.cache, open(CACHE, "wb"))
+
+
+if __name__ == '__main__':
+    it = gen_random_entry()
+
+    with Cache() as wl:
+        for i in range(5):
+            d, n, t = next(it)
+            wl[n].append((d, t))
+
+    print('Cached work so far')
+    print('(this will grow each time program is run)')
+    print()
+    col1, col2 = ('NAME', 'MINUTES')
+    print('{:<10}: {}'.format(col1, col2))
+    with Cache() as wl:
+        for name, work in sorted(wl.items()):
+            total = sum(w[1] for w in work)  # TODO: use namedtuple
+            print('{:<10}: {}'.format(name, total))

LOG.md

@@ -37,7 +37,7 @@
 | 033 | May 01, 2017 | [I need to drink more water at work so I wrote a #Python #script to remind (spam) me every hour](033) | A simple script using MIME and a cron job (read the readme.txt) to remind me to drink more water at work! Doesn't email on the weekends or before/after hours. Over the top? Maybe. Satisfying? Hell yes. |
 | 034 | May 02, 2017 | [Import a #podcast feed into a DB table with #SQLAlchemy](034) | Part of the this week's code challenge solution. Found it useful enough to extract this bit as separate nudget |
 | 035 | May 03, 2017 | [TITLE](035) | LEARNING |
-| 036 | May 04, 2017 | [TITLE](036) | LEARNING |
+| 036 | May 04, 2017 | [Use #Python #pickle to store and retrieve a defaultdict](036) | Nice and easy persistence tool. Using it with context manager to write random log entries. Each time the script is run the data pickle file gets updates. To get random entries I used a generator. |
 | 037 | May 05, 2017 | [TITLE](037) | LEARNING |
 | 038 | May 06, 2017 | [TITLE](038) | LEARNING |
 | 039 | May 07, 2017 | [TITLE](039) | LEARNING |