优化代码

data[len(data) - 1] 等效于 data[-1]。
wokwong · Mar 15, 2019 · 83c50c4 · 83c50c4
1 parent d5b287f
commit 83c50c4
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/Part.1.A.better.teachyourself.ipynb b/Part.1.A.better.teachyourself.ipynb
@@ -83,7 +83,7 @@
     "                     delimiter=',',\n",
     "                     names=['x', 'y'])\n",
     "da1960  = data[0][1]\n",
-    "da2016  = data[len(data)-1][1]\n",
+    "da2016  = data[-1][1]\n",
     "increase = (da2016 - da1960)/da1960\n",
     "note = 'from {:.2f} in 1960 to {:.2f} in 2016, increased  {:.2%}'\\\n",
     "    .format(da1960, da2016, increase)\n",