minor fixes

exercises/basics/basics-solution.ipynb

@@ -136,7 +136,7 @@
      "output_type": "stream",
      "text": [
       "<class 'int'>\n",
-      "94383670563968\n"
+      "94659737478272\n"
      ]
     }
    ],
@@ -162,8 +162,8 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "value: 4  type: <class 'int'>  id: 94383670563968\n",
-      "value: 5  type: <class 'int'>  id: 94383670564000\n"
+      "value: 4  type: <class 'int'>  id: 94659737478272\n",
+      "value: 5  type: <class 'int'>  id: 94659737478304\n"
      ]
     }
    ],
@@ -194,8 +194,8 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "value: 4  type: <class 'int'>  id: 94383670563968\n",
-      "value: four  type: <class 'str'>  id: 139792032191576\n"
+      "value: 4  type: <class 'int'>  id: 94659737478272\n",
+      "value: four  type: <class 'str'>  id: 140605610986440\n"
      ]
     }
    ],
@@ -234,7 +234,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "#### Exercise: variable names\n",
+    "### Exercise: variable names\n",
     "\n",
     "For each of the following names, try to guess if it is a valid _variable name_ or not, then try to assign it in following cell\n",
     "\n",
@@ -474,7 +474,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "#### Booleans exercise: constants \n",
+    "### Booleans exercise: constants \n",
     "\n",
     "Try to guess the result of these boolean expressions (_first_ guess, and _then_ try it out !!)\n"
    ]
@@ -604,7 +604,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "#### Booleans exercise: what is a boolean?\n",
+    "### Booleans exercise: what is a boolean?\n",
     "\n",
     "Read carefully previous description of booleans, and try to guess the result of following expressions."
    ]

exercises/dictionaries/dictionaries-solution.ipynb

@@ -509,6 +509,36 @@
     "d"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Dictionary methods\n",
+    "\n",
+    "Recall what seen in the lecture, the following methods are available for dictionaries:\n",
+    "\n",
+    "![](img/methods.png)\n",
+    "\n",
+    "These methods are new to dictionaries and can be used to loop through the elements in them.\n",
+    "\n",
+    "<div class=\"alert alert-warning\">\n",
+    "\n",
+    "**ATTENTION:** ```dict.keys()``` returns a ```dict_keys``` object not a list. To cast it to list, we need to call ```list(dict.keys())```.\n",
+    "\n",
+    "</div>\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Functions working on dictionaries\n",
+    "\n",
+    "As for the other data types, python provides several operators that can be applied to dictionaries. The following operators are available and they basically work as in lists. The only exception being that the operator **in** checks whether the specified object is present among the **keys**.\n",
+    "\n",
+    "![](img/operators.png)"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},