comprehension

Author: robertstephen

students/robert/Session 9/Comprehension.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python
+
+# Comprehension Lab
+
+#Count Even Numbers
+def count_evens(array):
+
+    updated_array = [x for x in array if x%2 == 0 or x == 0 ]
+    return len(updated_array)
+
+
+# comprehension test for dict and set
+food_prefs = {"name": "Chris",
+              "city": "Seattle",
+              "cake": "chocolate",
+              "fruit": "mango",
+              "salad": "greek",
+              "pasta": "lasagna"}
+
+def comprehension(dict):
+    print("{name} is from {city}, and he likes {cake} cake, {fruit} fruit, {salad} salad, and {pasta} pasta".format(**dict))
+
+
+num = [x for x in range(16)]
+nhex = [hex(x) for x in range(16)]
+
+for x in num:
+    for y in nhex:
+        numhex[x] = y
+
+
+numhex = {x:hex(x) for x in range(16)}
+
+
+#fp_copy = food_prefs
+fp_copy = {}
+
+def countA(v):
+    count = 0
+    for x in v:
+        if x == 'a' or x == 'A':
+            count+=1
+    return count
+
+for k,v in food_prefs.items():
+    fp_copy[k] = countA(v)
+
+
+Nlist = [i for i in range(21)]
+
+Dlist = [2,3,4]
+
+s2 = set(x for x in Nlist if x%2 == 0)
+
+s3 = set(x for x in Nlist if x%3 == 0)
+
+s4 = set(x for x in Nlist if x%4 == 0)
+
+#slist = [s2,s3,s4]
+
+slist = [set(x for x in Nlist if x%t == 0) for t in Dlist ]