it's a click cli now, and PDF output is working as an option

app/pdf.py

@@ -0,0 +1,39 @@
+import os
+import subprocess
+import tempfile
+
+
+def make_pdf(
+    problems: str, answers: str, output_path: str, include_answers: bool
+) -> None:
+    if include_answers:
+        pdf_jobs = (("problems", problems), ("answers", answers))
+    else:
+        pdf_jobs = ("problems", problems)
+
+    for job_name, job in pdf_jobs:
+
+        if job_name == "answers":
+            path, filename = os.path.split(output_path)
+            new_filename = f"{filename.split('.pdf')[0]}-answers.pdf"
+            output_path = os.path.join(path, new_filename)
+
+        with tempfile.NamedTemporaryFile(mode="w") as txt_file:
+            txt_file.write(job)
+            txt_file.flush()
+
+            command = (
+                f"enscript --columns=4 --no-header --output=tempfile.ps {txt_file.name}"
+            )
+            print(f"command: '{command}'")
+
+            output = subprocess.check_output(command, shell=True)
+            print(output)
+
+            command = f"ps2pdf tempfile.ps {output_path}"
+            print(f"command: '{command}'")
+
+            output = subprocess.check_output(command, shell=True)
+            print(output)
+        print("made pdf", output_path)
+        os.unlink("tempfile.ps")