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Create app.py
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app.py
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| 1 |
+
# -----------------------------------------------------------------------------
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| 2 |
+
# app_fhe.py – Gradio UI that performs audit‑opinion (credit‑risk) prediction
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| 3 |
+
# with a Concrete‑ML FHE‑compiled XGBoost model.
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| 4 |
+
# -----------------------------------------------------------------------------
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| 5 |
+
# Workflow
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| 6 |
+
# --------
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| 7 |
+
# 1. User uploads Excel ⇒ 24 financial ratios are computed.
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| 8 |
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# 2. Feature vector is encrypted with a freshly generated **public key**.
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| 9 |
+
# 3. FHE inference runs server‑side, returns ciphertext + **secret key**.
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| 10 |
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# 4. User pastes secret key → presses **Çöz** → result is decrypted client‑side.
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| 11 |
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# -----------------------------------------------------------------------------
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| 12 |
+
# NOTE: Key exchange is demo‑grade (base64). In production, the secret key
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| 13 |
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# should never leave the client; consider WebAssembly or hybrid encryption.
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| 14 |
+
# -----------------------------------------------------------------------------
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| 15 |
+
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| 16 |
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from __future__ import annotations
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| 17 |
+
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| 18 |
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import base64
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| 19 |
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import io
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| 20 |
+
from pathlib import Path
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| 21 |
+
from typing import Any
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| 22 |
+
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| 23 |
+
import gradio as gr
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| 24 |
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import joblib
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| 25 |
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import numpy as np
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import pandas as pd
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+
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| 28 |
+
# Concrete‑ML – change path if needed
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| 29 |
+
from concrete.ml.sklearn import FHEModel # type: ignore
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| 30 |
+
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+
# -----------------------------------------------------------------------------
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| 32 |
+
# CONSTANTS & PATHS
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| 33 |
+
# -----------------------------------------------------------------------------
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| 34 |
+
SAMPLE_DIR = "Sample Inputs (Excel)"
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| 35 |
+
EXAMPLE_XLSX = [
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f"{SAMPLE_DIR}/ADESE_2021.xlsx",
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f"{SAMPLE_DIR}/YYAPI_2017.xlsx",
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| 38 |
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f"{SAMPLE_DIR}/SRVGY_2022.xlsx",
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f"{SAMPLE_DIR}/THYAO_2023.xlsx",
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| 40 |
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f"{SAMPLE_DIR}/TTRAK_2024.xlsx",
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| 41 |
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]
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| 43 |
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FHE_MODEL_PATH = "fhe_xgb.joblib" # Concrete‑ML‑compiled model
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| 44 |
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ENCODER_PATH = "label_encoder.joblib" # scikit‑learn LabelEncoder
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| 45 |
+
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| 46 |
+
# 24‑FEATURE SET (user‑provided)
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| 47 |
+
SELECTED_FEATS = [
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| 48 |
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"Finansal Kaldıraç", "Zmijewski Skoru", "Cari Oran", "Asit Test Oranı",
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| 49 |
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"Nakit Oranı", "Aktif Devir Hızı", "Duran Varlıklar / Aktif ",
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| 50 |
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"Altman Z-Skoru", "Brüt Kar Marjı (%)", "Özsermaye / Aktif",
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| 51 |
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"Kısa Vade Borç / Aktif", "ROCE Oranı", "L Model Skoru", "Net Kar Marjı",
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| 52 |
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"Dönen Varlıklar Devir Hızı", "Dönen Varlıklar / Aktif (%)",
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| 53 |
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"Esas Faaliyet Karı / Kısa Vadeli Borç", "Kısa Vade Borç / Özsermaye",
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| 54 |
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"Kısa Vade Borç / Toplam Borç", "Finansman Gider / Net Satış",
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| 55 |
+
"Faaliyet Kar Marjı", "Aktif Karlılık (%)", "Stok Devir Hızı",
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| 56 |
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"Özsermaye / Maddi Duran Varlıklar",
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| 57 |
+
]
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| 58 |
+
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| 59 |
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DISPLAY_FEATS = ["Altman Z-Skoru", "L Model Skoru", "Zmijewski Skoru"]
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| 60 |
+
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| 61 |
+
# -----------------------------------------------------------------------------
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| 62 |
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# LOAD FHE MODEL (compile if necessary)
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| 63 |
+
# -----------------------------------------------------------------------------
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| 64 |
+
FHE_MODEL: FHEModel = joblib.load(FHE_MODEL_PATH)
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| 65 |
+
LABEL_ENCODER = joblib.load(ENCODER_PATH)
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| 66 |
+
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| 67 |
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if not getattr(FHE_MODEL, "is_compiled", False):
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| 68 |
+
FHE_MODEL.compile(np.zeros((1, len(SELECTED_FEATS)), dtype=np.float32))
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| 69 |
+
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| 70 |
+
# -----------------------------------------------------------------------------
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| 71 |
+
# FINANCIAL‑RATIO UTILITIES
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| 72 |
+
# -----------------------------------------------------------------------------
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| 73 |
+
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| 74 |
+
def safe_div(num: pd.Series, denom: pd.Series) -> pd.Series:
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| 75 |
+
"""Safe division that returns 0 when denominator is 0."""
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| 76 |
+
denom_replaced = denom.replace(0, np.nan)
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| 77 |
+
return (num / denom_replaced).fillna(0)
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| 78 |
+
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| 79 |
+
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| 80 |
+
def compute_ratios(df: pd.DataFrame) -> pd.DataFrame:
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| 81 |
+
"""Compute the 24 ratios needed for the FHE model and add them to *df*."""
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| 82 |
+
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| 83 |
+
# Totals
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| 84 |
+
total_assets = df["Dönen Varlıklar"] + df["Duran Varlıklar"]
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| 85 |
+
total_liab = df["Kısa Vadeli Yükümlülükler"] + df["Uzun Vadeli Yükümlülükler"]
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| 86 |
+
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| 87 |
+
# 1‑3 Likidite
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| 88 |
+
df["Cari Oran"] = safe_div(df["Dönen Varlıklar"], df["Kısa Vadeli Yükümlülükler"])
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| 89 |
+
df["Asit Test Oranı"] = safe_div(df["Dönen Varlıklar"] - df["Stoklar"] - df["Diğer Dönen Varlıklar"],
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| 90 |
+
df["Kısa Vadeli Yükümlülükler"])
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| 91 |
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df["Nakit Oranı"] = safe_div(df["Nakit ve Nakit Benzerleri"], df["Kısa Vadeli Yükümlülükler"])
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| 92 |
+
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| 93 |
+
# 4‑7 Marj & kârlılık
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| 94 |
+
df["Faaliyet Kar Marjı"] = safe_div(df["FAALİYET KARI (ZARARI)"]*100, df["Satış Gelirleri"])
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| 95 |
+
df["Brüt Kar Marjı (%)"] = safe_div(df["Ticari Faaliyetlerden Brüt Kar (Zarar)"]*100,
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| 96 |
+
df["Satış Gelirleri"])
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| 97 |
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df["Net Kar Marjı"] = safe_div(df["Dönem Net Kar/Zararı"]*100, df["Satış Gelirleri"])
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| 98 |
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df["Aktif Karlılık (%)"] = safe_div(df["Dönem Net Kar/Zararı"]*100, total_assets)
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| 99 |
+
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| 100 |
+
# 8‑10 Verimlilik
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| 101 |
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df["Aktif Devir Hızı"] = safe_div(df["Satış Gelirleri"], total_assets)
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| 102 |
+
df["Dönen Varlıklar Devir Hızı"] = safe_div(df["Dönen Varlıklar"], df["Satış Gelirleri"])
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| 103 |
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df["Stok Devir Hızı"] = -safe_div(df["Satışların Maliyeti (-)"], df["Stoklar"])
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| 104 |
+
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| 105 |
+
# 11‑15 Borç & kaldıraç
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| 106 |
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df["Finansal Kaldıraç"] = safe_div(total_liab, total_assets)*100
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| 107 |
+
df["Kısa Vade Borç / Aktif"] = safe_div(df["Kısa Vadeli Yükümlülükler"], total_assets)
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| 108 |
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df["Kısa Vade Borç / Özsermaye"] = safe_div(df["Kısa Vadeli Yükümlülükler"], df["Özkaynaklar"])
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| 109 |
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df["Kısa Vade Borç / Toplam Borç"] = safe_div(df["Kısa Vadeli Yükümlülükler"], total_liab)
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| 110 |
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df["Özsermaye / Aktif"] = safe_div(df["Özkaynaklar"], total_assets)
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| 111 |
+
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| 112 |
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# 16‑18 Diğer oranlar
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| 113 |
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df["Duran Varlıklar / Aktif "] = safe_div(df["Duran Varlıklar"]*100, total_assets)
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| 114 |
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df["Dönen Varlıklar / Aktif (%)"] = safe_div(df["Dönen Varlıklar"]*100, total_assets)
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| 115 |
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df["Özsermaye / Maddi Duran Varlıklar"] = safe_div(df["Özkaynaklar"], df["Maddi Duran Varlıklar"])
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| 116 |
+
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| 117 |
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# 19‑20 Finansman
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| 118 |
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df["Finansman Gider / Net Satış"] = safe_div(df["Finansman Giderleri"], df["Satış Gelirleri"])
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| 119 |
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df["Esas Faaliyet Karı / Kısa Vadeli Borç"] = safe_div(df["Net Faaliyet Kar/Zararı"],
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| 120 |
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df["Kısa Vadeli Yükümlülükler"])
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| 121 |
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| 122 |
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# ROCE
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| 123 |
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df["ROCE Oranı"] = safe_div(df["FAALİYET KARI (ZARARI)"]*100, total_assets)
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| 124 |
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| 125 |
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# ----- Distress & lifetime scores ---------------------------------------------------------
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| 126 |
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# Altman Z
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| 127 |
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X1 = safe_div(df["Dönen Varlıklar"] - df["Kısa Vadeli Yükümlülükler"], total_assets)
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| 128 |
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X2 = safe_div(df["Geçmiş Yıllar Kar/Zararları"] + df["Dönem Net Kar/Zararı"], total_assets)
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| 129 |
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X3 = safe_div(df["SÜRDÜRÜLEN FAALİYETLER VERGİ ÖNCESİ KARI (ZARARI)"], total_assets)
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| 130 |
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X4 = safe_div(df["Özkaynaklar"], total_liab)
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| 131 |
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X5 = safe_div(df["Satış Gelirleri"], total_assets)
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| 132 |
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| 133 |
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df["Altman Z-Skoru"] = 1.2*X1 + 1.4*X2 + 3.3*X3 + 0.6*X4 + X5
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| 134 |
+
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| 135 |
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# Zmijewski
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| 136 |
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Z1 = safe_div(df["Dönem Net Kar/Zararı"], total_assets)
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| 137 |
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Z2 = safe_div(total_liab, total_assets)
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| 138 |
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Z3 = safe_div(df["Dönen Varlıklar"], df["Kısa Vadeli Yükümlülükler"])
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| 139 |
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df["Zmijewski Skoru"] = -4.3 - 4.5*Z1 + 5.7*Z2 - 0.004*Z3
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| 140 |
+
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| 141 |
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# L‑Model
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| 142 |
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L6 = safe_div(safe_div(df["Nakit ve Nakit Benzerleri"], df["Kısa Vadeli Yükümlülükler"]), total_liab)
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| 143 |
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L7 = safe_div(total_liab, total_assets)
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| 144 |
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df["L Model Skoru"] = -0.113*X1 + 0.238*X2 - 0.052*X3 - 0.051*X4 + 0.011*X5 + 0.729*L6 - 0.639*L7
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| 145 |
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| 146 |
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return df
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# -----------------------------------------------------------------------------
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| 149 |
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# BASE64 HELPERS
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| 150 |
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# -----------------------------------------------------------------------------
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| 151 |
+
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| 152 |
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def _b64_dump(obj: Any) -> str:
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| 153 |
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buff = io.BytesIO()
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| 154 |
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joblib.dump(obj, buff)
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| 155 |
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buff.seek(0)
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| 156 |
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return base64.b64encode(buff.read()).decode()
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| 157 |
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| 158 |
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| 159 |
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def _b64_load(txt: str) -> Any:
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| 160 |
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return joblib.load(io.BytesIO(base64.b64decode(txt.encode())))
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| 161 |
+
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# -----------------------------------------------------------------------------
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| 163 |
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# SESSION STATE
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| 164 |
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# -----------------------------------------------------------------------------
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| 165 |
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| 166 |
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encrypted_pred_state = gr.State(value=None)
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| 167 |
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| 168 |
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# -----------------------------------------------------------------------------
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| 169 |
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# CALLBACKS
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| 170 |
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# -----------------------------------------------------------------------------
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| 171 |
+
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| 172 |
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def encrypt_and_predict(excel_file: gr.File):
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| 173 |
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"""Encrypt features and run FHE inference; return secret key to the user."""
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| 174 |
+
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| 175 |
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if excel_file is None:
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| 176 |
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raise gr.Error("Lütfen analiz edilecek Excel dosyasını yükleyin.")
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| 177 |
+
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| 178 |
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p = gr.Progress(track_tqdm=False)
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| 179 |
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p(0.05, "Excel okunuyor…")
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| 180 |
+
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| 181 |
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# ---- 1. Read + pivot ----------------------------------------------------
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| 182 |
+
raw_vert = pd.read_excel(excel_file.name, header=None, sheet_name=0)
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| 183 |
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raw_df = (
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| 184 |
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raw_vert.set_index(0).T.rename_axis(None).reset_index(drop=True)
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| 185 |
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)
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| 186 |
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raw_df.columns = raw_df.columns.str.strip()
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| 187 |
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raw_df = raw_df.loc[:, ~raw_df.columns.duplicated()]
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| 188 |
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raw_df.rename(columns={"Desc": "Periyot"}, inplace=True)
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| 189 |
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raw_df["Periyot"] = raw_df["Periyot"].astype(str).str.replace(r"\s+", " ", regex=True).str.strip()
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| 190 |
+
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| 191 |
+
# ---- 2. Ratios ----------------------------------------------------------
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| 192 |
+
p(0.30, "Oranlar hesaplanıyor…")
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| 193 |
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enriched = compute_ratios(raw_df.copy())
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| 194 |
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model_input = enriched[SELECTED_FEATS].copy().dropna()
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| 195 |
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if model_input.empty:
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| 196 |
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raise gr.Error("Hiç analiz edilebilir satır kalmadı – oran hesaplanamadı.")
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| 197 |
+
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| 198 |
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# ---- 3. Keygen ----------------------------------------------------------
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| 199 |
+
p(0.55, "Anahtarlar oluşturuluyor…")
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| 200 |
+
public_key, secret_key = FHE_MODEL.keygen()
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| 201 |
+
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| 202 |
+
# ---- 4. Encrypted inference --------------------------------------------
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| 203 |
+
p(0.75, "Şifreli tahmin yapılıyor…")
|
| 204 |
+
x_enc = FHE_MODEL.encrypt(model_input.values.astype(np.float32), public_key)
|
| 205 |
+
y_enc = FHE_MODEL.run(x_enc)
|
| 206 |
+
|
| 207 |
+
encrypted_pred_state.value = y_enc
|
| 208 |
+
|
| 209 |
+
# ---- 5. Small bar chart -------------------------------------------------
|
| 210 |
+
ratio_row = model_input.iloc[0][DISPLAY_FEATS]
|
| 211 |
+
max_abs = ratio_row.abs().max() or 1
|
| 212 |
+
bars_html = "<table style='width:100%;font-size:0.85rem'>"
|
| 213 |
+
for k, v in ratio_row.items():
|
| 214 |
+
pct = abs(v)/max_abs*100
|
| 215 |
+
bars_html += (
|
| 216 |
+
f"<tr><td style='padding:2px 6px;white-space:nowrap'>{k}</td>"
|
| 217 |
+
f"<td style='width:100%'><div style='background:#e5e5e5;height:8px;border-radius:4px'>"
|
| 218 |
+
f"<div style='width:{pct:.1f}%;height:8px;background:#3b82f6;border-radius:4px'></div>"
|
| 219 |
+
f"</div></td><td style='padding-left:6px'>{v:.2f}</td></tr>"
|
| 220 |
+
)
|
| 221 |
+
bars_html += "</table>"
|
| 222 |
+
|
| 223 |
+
secret_key_b64 = _b64_dump(secret_key)
|
| 224 |
+
|
| 225 |
+
return (
|
| 226 |
+
gr.update(value="### Ham Veri", visible=True),
|
| 227 |
+
gr.update(value=raw_df.head(), visible=True),
|
| 228 |
+
gr.update(value="### Finansal Oranlar", visible=True),
|
| 229 |
+
gr.update(value=bars_html, visible=True),
|
| 230 |
+
gr.update(value="### Tahmin (Şifreli)", visible=True),
|
| 231 |
+
gr.update(value="Şifreli tahmin hazır. Aşağıdaki gizli anahtarı kaydedin ve 'Çöz' düğmesine bastığınızda tahmin açığa çıkacaktır.", visible=True),
|
| 232 |
+
gr.update(value=secret_key_b64, visible=True),
|
| 233 |
+
)
|
| 234 |
+
|
| 235 |
+
|
| 236 |
+
def decrypt_prediction(secret_key_b64: str):
|
| 237 |
+
"""Decrypt the FHE ciphertext using the user‑supplied secret key."""
|
| 238 |
+
|
| 239 |
+
if encrypted_pred_state.value is None:
|
| 240 |
+
raise gr.Error("Önce 'Şifrele & Tahmin Et' adımını tamamlayın.")
|
| 241 |
+
if not secret_key_b64:
|
| 242 |
+
raise gr.Error("Gizli anahtarı girin.")
|
| 243 |
+
|
| 244 |
+
secret_key = _b64_load(secret_key_b64)
|
| 245 |
+
y_enc = encrypted_pred_state.value
|
| 246 |
+
y_pred = FHE_MODEL.decrypt(y_enc, secret_key)
|
| 247 |
+
labels = LABEL_ENCODER.inverse_transform(np.array(y_pred, dtype=int))
|
| 248 |
+
|
| 249 |
+
result_df = pd.DataFrame({"Tahmin Görüş Tipi": labels})
|
| 250 |
+
|
| 251 |
+
return (
|
| 252 |
+
gr.update(value="### Tahmin Sonuçları", visible=True),
|
| 253 |
+
gr.update(value=result_df, visible=True),
|
| 254 |
+
)
|
| 255 |
+
|
| 256 |
+
# -----------------------------------------------------------------------------
|
| 257 |
+
# GRADIO UI
|
| 258 |
+
# -----------------------------------------------------------------------------
|
| 259 |
+
with gr.Blocks(theme=gr.themes.Default(primary_hue="blue")) as demo:
|
| 260 |
+
gr.Markdown("# Denetçi Görüşü Tahmini – FHE (24 Oran)")
|
| 261 |
+
|
| 262 |
+
with gr.Row():
|
| 263 |
+
file_input = gr.File(file_types=[".xlsx", ".xls", ".xlsm"], label="Excel Yükleyin")
|
| 264 |
+
predict_btn = gr.Button("Şifrele & Tahmin Et", variant="primary")
|
| 265 |
+
|
| 266 |
+
gr.Examples(EXAMPLE_XLSX, inputs=file_input, label="Örnek Dosyayı Deneyin", cache_examples=False)
|
| 267 |
+
|
| 268 |
+
secret_key_output = gr.Textbox(label="Gizli Anahtar (kopyalayın)", visible=False, interactive=False)
|
| 269 |
+
decrypt_key_input = gr.Textbox(label="Gizli Anahtarı Yapıştırın ve Çözün", visible=False)
|
| 270 |
+
decrypt_btn = gr.Button("Çöz", variant="secondary", visible=False)
|
| 271 |
+
|
| 272 |
+
ham_title = gr.Markdown(visible=False)
|
| 273 |
+
raw_table = gr.Dataframe(visible=False, wrap=True, show_label=False)
|
| 274 |
+
|
| 275 |
+
ratio_title = gr.Markdown(visible=False)
|
| 276 |
+
ratio_html = gr.HTML(visible=False)
|
| 277 |
+
|
| 278 |
+
enc_title = gr.Markdown(visible=False)
|
| 279 |
+
enc_msg = gr.Markdown(visible=False)
|
| 280 |
+
|
| 281 |
+
pred_title = gr.Markdown(visible=False)
|
| 282 |
+
pred_table = gr.Dataframe(visible=False, wrap=True, show_label=False)
|
| 283 |
+
|
| 284 |
+
predict_btn.click(
|
| 285 |
+
encrypt_and_predict,
|
| 286 |
+
inputs=[file_input],
|
| 287 |
+
outputs=[ham_title, raw_table, ratio_title, ratio_html, enc_title, enc_msg, secret_key_output]
|
| 288 |
+
).then(lambda x: gr.update(visible=True), None, decrypt_key_input
|
| 289 |
+
).then(lambda x: gr.update(visible=True), None, decrypt_btn)
|
| 290 |
+
|
| 291 |
+
decrypt_btn.click(
|
| 292 |
+
decrypt_prediction,
|
| 293 |
+
inputs=[decrypt_key
|