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app.py

@@ -50,7 +50,7 @@ def darcy_weisbach_calculation(
 
     # Darcy–Weisbach head loss: h_f = f*(L/D)*(v^2/(2g))
     g = 9.80665  # m/s^2
-    hf = f * (L/D) * (v^2/(2*g))
+    hf = f * (L/D) * (v**2/(2*g))
 
     # Pressure drop: ΔP = rho*g*h_f
     dP = rho * g * hf
@@ -136,27 +136,15 @@ def explain_results(structured_message):
     context = json.dumps(structured_message, indent=2)
 
     prompt = (
-        "You are an engineering tutor. Read the structured calculation JSON and produce a clear, concise explanation for a non-expert.
-"
-        "Goals:
-"
-        "- Briefly restate the problem and assumptions.
-"
-        "- Highlight the formulas and what they mean physically.
-"
-        "- Interpret the Reynolds number and friction factor.
-"
-        "- Explain head loss and pressure drop magnitudes and practical implications.
-"
-        "- If inputs look out of typical ranges, gently flag them.
-"
-        "Stay under 180 words. Avoid equations in LaTeX; use plain words.
-
-"
-        f"JSON:
-{context}
-
-"
+        "You are an engineering tutor. Read the structured calculation JSON and produce a clear, concise explanation for a non-expert.\n"
+        "Goals:\n"
+        "- Briefly restate the problem and assumptions.\n"
+        "- Highlight the formulas and what they mean physically.\n"
+        "- Interpret the Reynolds number and friction factor.\n"
+        "- Explain head loss and pressure drop magnitudes and practical implications.\n"
+        "- If inputs look out of typical ranges, gently flag them.\n"
+        "Stay under 180 words. Avoid equations in LaTeX; use plain words.\n\n"
+        f"JSON:\n{{context}}\n\n"
         "Explanation:"
     )
     out = llm(prompt, max_new_tokens=220)