initial creation

py3interm/EXAMPLES/custom_sort_keys.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python
+
+fruit = ["pomegranate", "cherry", "apricot", "date", "Apple", "lemon",
+         "Kiwi", "ORANGE", "lime", "Watermelon", "guava", "papaya", "FIG",
+         "pear", "banana", "Tamarind", "persimmon", "elderberry", "peach",
+         "BLUEberry", "lychee", "grape"]
+
+def ignore_case(item):  # <1>
+    return item.lower()  # <2>
+
+fs1 = sorted(fruit, key=ignore_case)  # <3>
+print("Ignoring case:")
+print(" ".join(fs1), end="\n\n")
+
+def by_length_then_name(item):
+    return (len(item), item.lower())  # <4>
+
+fs2 = sorted(fruit, key=by_length_then_name)
+print("By length, then name:")
+print(" ".join(fs2))
+print()
+
+nums = [800, 80, 1000, 32, 255, 400, 5, 5000]
+
+n1 = sorted(nums)  # <5>
+print("Numbers sorted numerically:")
+for n in n1:
+    print(n, end=' ')
+print("\n")
+
+n2 = sorted(nums, key=str)  # <6>
+print("Numbers sorted as strings:")
+for n in n2:
+    print(n, end=' ')
+print()