move model instantiation inside loop

notebooks/func_effect_shifts.ipynb

@@ -148,11 +148,11 @@
     "n_lasso = len(params[\"lasso_shifts\"])\n",
     "fig, ax = plt.subplots(n_lasso, 2, figsize=[6, n_lasso * 3])\n",
     "\n",
-    "model = multidms.Model(data)\n",
     "mutations_df = []\n",
     "for i, lasso_shift in enumerate(lasso_shifts):\n",
     "    lasso_shift = float(lasso_shift)\n",
     "    print(f\"Fitting model for {lasso_shift=}\")\n",
+    "    model = multidms.Model(data)\n",
     "    model.fit(lasso_shift=lasso_shift)\n",
     "    mutations_df.append(\n",
     "        model.get_mutations_df(phenotype_as_effect=True).assign(lasso_shift=lasso_shift)\n",