Last-minute changes to automation lesson

automation_python.ipynb

@@ -479,27 +479,15 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "For errors we get without directly calling `raise`, both the class of `Error` and the message are predetermined. This is useful in some situations, but less so in others. Suppose you wrote a reverse complement function like the one below:"
+    "For errors we get without directly calling `raise`, both the class of `Error` and the message are predetermined. This is useful in some situations, but less so in others. Suppose you wrote a reverse complement function:"
    ]
   },
   {
    "cell_type": "code",
    "execution_count": null,
    "metadata": {},
    "outputs": [],
-   "source": [
-    "def reverse_complement(dna_sequence):\n",
-    "    \"\"\"Reverses the complement of a dna sequence\"\"\"\n",
-    "    complements = {\"T\":\"A\", \"A\":\"T\", \"C\":\"G\", \"G\":\"C\"}\n",
-    "    reverse = dna_sequence[::-1]\n",
-    "    result = \"\"\n",
-    "    for letter in reverse:\n",
-    "        result = result + complements[letter]\n",
-    "    return(result)\n",
-    "\n",
-    "help(reverse_complement)\n",
-    "print(reverse_complement(\"CAAT\"))"
-   ]
+   "source": []
   },
   {
    "cell_type": "markdown",
@@ -804,14 +792,14 @@
     "gapminder['region'] = gapminder['region'].astype(str)\n",
     "\n",
     "# Method 1 for formatting the 'region' column:\n",
-    "gapminder_copy['region'] = gapminder_copy['region'].str.lstrip() # Strip white space on left\n",
-    "gapminder_copy['region'] = gapminder_copy['region'].str.rstrip() # Strip white space on right\n",
-    "gapminder_copy['region'] = gapminder_copy['region'].str.lower() # Convert to lowercase\n",
+    "gapminder['region'] = gapminder['region'].str.lstrip() # Strip white space on left\n",
+    "gapminder['region'] = gapminder['region'].str.rstrip() # Strip white space on right\n",
+    "gapminder['region'] = gapminder['region'].str.lower() # Convert to lowercase\n",
     "\n",
     "# Method 2 for formatting the 'region' column:\n",
-    "gapminder_copy['region'] = gapminder['region'].str.lstrip().str.rstrip().str.lower() # Strip white space on left and right, and convert to lowercase\n",
+    "gapminder['region'] = gapminder['region'].str.lstrip().str.rstrip().str.lower() # Strip white space on left and right, and convert to lowercase\n",
     "\n",
-    "print(gapminder_copy['region'])"
+    "print(gapminder['region'])"
    ]
   },
   {

automation_python_instructor.ipynb

@@ -556,7 +556,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "For errors we get without directly calling `raise`, both the class of `Error` and the message are predetermined. This is useful in some situations, but less so in others. Suppose you wrote a reverse complement function like the one below:"
+    "For errors we get without directly calling `raise`, both the class of `Error` and the message are predetermined. This is useful in some situations, but less so in others. Suppose you wrote a reverse complement function:"
    ]
   },
   {
@@ -565,6 +565,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
+    "# live demo\n",
     "def reverse_complement(dna_sequence):\n",
     "    \"\"\"Reverses the complement of a dna sequence\"\"\"\n",
     "    complements = {\"T\":\"A\", \"A\":\"T\", \"C\":\"G\", \"G\":\"C\"}\n",
@@ -975,14 +976,14 @@
     "gapminder['region'] = gapminder['region'].astype(str)\n",
     "\n",
     "# Method 1 for formatting the 'region' column:\n",
-    "gapminder_copy['region'] = gapminder_copy['region'].str.lstrip() # Strip white space on left\n",
-    "gapminder_copy['region'] = gapminder_copy['region'].str.rstrip() # Strip white space on right\n",
-    "gapminder_copy['region'] = gapminder_copy['region'].str.lower() # Convert to lowercase\n",
+    "gapminder['region'] = gapminder['region'].str.lstrip() # Strip white space on left\n",
+    "gapminder['region'] = gapminder['region'].str.rstrip() # Strip white space on right\n",
+    "gapminder['region'] = gapminder['region'].str.lower() # Convert to lowercase\n",
     "\n",
     "# Method 2 for formatting the 'region' column:\n",
-    "gapminder_copy['region'] = gapminder['region'].str.lstrip().str.rstrip().str.lower() # Strip white space on left and right, and convert to lowercase\n",
+    "gapminder['region'] = gapminder['region'].str.lstrip().str.rstrip().str.lower() # Strip white space on left and right, and convert to lowercase\n",
     "\n",
-    "print(gapminder_copy['region'])"
+    "print(gapminder['region'])"
    ]
   },
   {