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app/main.py

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+import sys
+
+from app.generate import generate_answers, generate_problems
+from config import BEGIN_ANSWERS_TOKEN
+
+
+def main():
+    if len(sys.argv) < 3:
+        print(
+            "please supply the number of bits and the number of exercises you'd like, "
+            "space-separated, like so:\n\n    $ binary 8 100\n"
+        )
+        sys.exit()
+
+    bits = int(sys.argv[1])
+    num_problems = int(sys.argv[2])
+
+    problems = generate_problems(bits, num_problems)
+    answers = generate_answers(problems)
+
+    problems_string = "\n\n".join(problems)
+    answers_string = "\n\n".join(
+        [f"{problem} | {answer} " for problem, answer in zip(problems, answers)]
+    )
+
+    sys.stdout.write(BEGIN_ANSWERS_TOKEN.join((problems_string, answers_string)))
+    return problems_string, answers_string