2017.3.6 small adds on lesson 3

Yimeng-Zhang · web-flow · commit 259619d2ce74 · 2017-03-06T23:19:18.000+08:00
diff --git a/python_basic/python_basic_lesson_03.ipynb b/python_basic/python_basic_lesson_03.ipynb
@@ -6,7 +6,8 @@
    "source": [
     "# Lesson 3\n",
     "\n",
-    "Python Basic, Lesson 3, v1.0.0, 2016.12 by David.Yi\n",
+    "Python Basic, Lesson 3, v1.0.1, 2016.12 by David.Yi   \n",
+    "Python Basic, Lesson 3, v1.0.2, 2017.03 modified by Yimeng.Zhang   \n",
     "\n",
     "\n",
     "### 上次内容要点\n",
@@ -128,7 +129,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 2,
    "metadata": {
     "collapsed": false
    },
@@ -138,8 +139,7 @@
      "output_type": "stream",
      "text": [
       "[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99]\n",
-      "\n",
-      " [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]\n"
+      "[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]\n"
      ]
     }
    ],
@@ -518,6 +518,9 @@
     }
    ],
    "source": [
+    "# 请注意，函数体内部的语句在执行时，一旦执行到return时，函数就执行完毕，并将结果返回。\n",
+    "# 因此，函数内部通过条件判断和循环可以实现非常复杂的逻辑。\n",
+    "\n",
     "def my_max(a,b):\n",
     "    if a > b:\n",
     "        return a\n",
@@ -544,6 +547,9 @@
     }
    ],
    "source": [
+    "# 函数的不同参数形式--下节课再讲！\n",
+    "# *number理解为可以传入任意数目个参数，包括0个参数\n",
+    "\n",
     "def my_max(*number):\n",
     "    print(number)\n",
     "    return 100\n",
@@ -595,6 +601,8 @@
     }
    ],
    "source": [
+    "# Python的函数返回多值其实就是返回一个tuple，但语法上可以省略括号，写起来更方便\n",
+    "\n",
     "def my_max_min(*number):\n",
     "    a_list = list(number)\n",
     "    a_list.sort()\n",
@@ -925,7 +933,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.5.2"
+   "version": "3.5.1"
   }
  },
  "nbformat": 4,
