From 5c417600e79ef462c6f8497e432c7ee48b9e9ce0 Mon Sep 17 00:00:00 2001
From: Alexander Ou <alexou@femtodata.com>
Date: Tue, 8 Aug 2023 18:33:24 -0700
Subject: [PATCH] more exercises

---
 exercises.py | 33 +++++++++++++++++++++++++++++++++
 solutions.py | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+)

diff --git a/exercises.py b/exercises.py
index 931047e..bbf08f6 100644
--- a/exercises.py
+++ b/exercises.py
@@ -23,6 +23,14 @@ def dict_comprehension(l1: list):
     return None
 
 
+def generator(l1: list, l2: list):
+    """For input lists l1 and l2 of integers, return a generator
+    that gives all pairings (e1, e2) of element e1 from l1 and
+    element e2 of l2."""
+
+    raise NotImplementedError("Not implemented")
+
+
 if __name__ == "__main__":
     l1 = [1, 2, 3, 4]
     l2 = [2, 4, 6, 8]
@@ -47,3 +55,28 @@ if __name__ == "__main__":
     print("Desired output: {1: 1, 2: 4, 3: 9, 4: 16}")
     print(f"Output:       : {dict_comprehension(l1)}")
     print("\n-------------------\n")
+
+    print("generator:\n")
+    print("Desired output:")
+    print("  (1, 2)")
+    print("  (1, 4)")
+    print("  (1, 6)")
+    print("  (1, 8)")
+    print("  (2, 2)")
+    print("  (2, 4)")
+    print("  (2, 6)")
+    print("  (2, 8)")
+    print("  (3, 2)")
+    print("  (3, 4)")
+    print("  (3, 6)")
+    print("  (3, 8)")
+    print("  (4, 2)")
+    print("  (4, 4)")
+    print("  (4, 6)")
+    print("  (4, 8)")
+    print("Output:       :")
+    try:
+        for pair in generator(l1, l2):
+            print(f"  {pair}")
+    except NotImplementedError as e:
+        print(e)
diff --git a/solutions.py b/solutions.py
index 971924e..8655b0e 100644
--- a/solutions.py
+++ b/solutions.py
@@ -34,6 +34,16 @@ def dict_comprehension(l1: list):
     return result
 
 
+def generator(l1: list, l2: list):
+    """For input lists l1 and l2 of integers, return a generator
+    that gives all pairings (e1, e2) of element e1 from l1 and
+    element e2 of l2."""
+
+    for e1 in l1:
+        for e2 in l2:
+            yield (e1, e2)
+
+
 if __name__ == "__main__":
     l1 = [1, 2, 3, 4]
     l2 = [2, 4, 6, 8]
@@ -58,3 +68,25 @@ if __name__ == "__main__":
     print("Desired output: {1: 1, 2: 4, 3: 9, 4: 16}")
     print(f"Output:       : {dict_comprehension(l1)}")
     print("\n-------------------\n")
+
+    print("generator:\n")
+    print("Desired output:")
+    print("  (1, 2)")
+    print("  (1, 4)")
+    print("  (1, 6)")
+    print("  (1, 8)")
+    print("  (2, 2)")
+    print("  (2, 4)")
+    print("  (2, 6)")
+    print("  (2, 8)")
+    print("  (3, 2)")
+    print("  (3, 4)")
+    print("  (3, 6)")
+    print("  (3, 8)")
+    print("  (4, 2)")
+    print("  (4, 4)")
+    print("  (4, 6)")
+    print("  (4, 8)")
+    print("Output:       :")
+    for pair in generator(l1, l2):
+        print(f"  {pair}")