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diff --git a/‎python_basic_1_2.ipynb‎
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diff --git a/‎python_basic_1_intro.ipynb‎
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diff --git a/‎python_basic_2_3.ipynb‎
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@@ -10,7 +10,7 @@
    "source": [
     "# An introduction to solving biological problems with Python\n",
     "\n",
-    "## Day 1 - Session 1: \n",
+    "## Day 1 - Session 1: Variables\n",
     "\n",
     "- [Printing values](#Printing-values)\n",
     "- [Exercises 1.1.1](#Exercises-1.1.1)\n",
 
@@ -10,7 +10,7 @@
    "source": [
     "# An introduction to solving biological problems with Python\n",
     "\n",
-    "## Day 1 - Session 2: \n",
+    "## Day 1 - Session 2: Simple data types\n",
     "\n",
     "- [Simple data types](#Simple-data-types): [Integers](#Integers), [Floats](#Floats), [Strings](#Strings) and [Booleans](#Booleans)\n",
     "- [Comments](#Comments)\n",
@@ -485,6 +485,14 @@
     "\n",
     "As we mentioned earlier, you can also save python code in a file and then execute it later. We typically save python code in a file ending with the extension <tt>.py</tt>. The file, or _script_, can then be executed simply by supplying the name of the file as an argument to the <tt>python</tt> command in the terminal.\n",
     "\n",
+    "The first thing you may want to do, before going any further, is to verify the version of python you are running. To do so, open a terminal window and execute this command:\n",
+    "\n",
+    "```bash\n",
+    "python --version\n",
+    "```\n",
+    "\n",
+    "You should be running Python 3.5.x.\n",
+    "\n",
     "The first file we will be looking at is located in the `scripts` directory and it is called `hello.py`. To execute the script, open a terminal window, navigate to the `scripts` directory and execute the code in the script `hello.py` by running `python hello.py` in your terminal:\n",
     "\n",
     "```bash\n",
 
@@ -85,7 +85,7 @@
    "source": [
     "## Course schedule - day two\n",
     "\n",
-    "- Loops and Files"
+    "- Conditions, Loops and Files"
    ]
   },
   {
@@ -298,15 +298,6 @@
     "\n",
     "- Go to our notebook for the fist session: [python_basic_1_1](python_basic_1_1.ipynb)"
    ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {
-    "collapsed": false
-   },
-   "outputs": [],
-   "source": []
   }
  ],
  "metadata": {
 
@@ -297,7 +297,7 @@
     "# fileObj will be closed when leaving the block\n",
     "with open( \"data/datafile.txt\" ) as fileObj:\n",
     "    for ( i, line ) in enumerate( fileObj, start = 1 ):\n",
-    "        print(\"%s: %r\" % ( i, line ))"
+    "        print( i, line.strip() )"
    ]
   },
   {
Original file line number	Diff line number	Diff line change
`@@ -85,7 +85,7 @@`
`85`	`85`	`"source": [`
`86`	`86`	`"## Course schedule - day two\n",`
`87`	`87`	`"\n",`
`88`		`- "- Loops and Files"`
	`88`	`+ "- Conditions, Loops and Files"`
`89`	`89`	`]`
`90`	`90`	`},`
`91`	`91`	`{`
`@@ -298,15 +298,6 @@`
`298`	`298`	`"\n",`
`299`	`299`	`"- Go to our notebook for the fist session: [python_basic_1_1](python_basic_1_1.ipynb)"`
`300`	`300`	`]`
`301`		`- },`
`302`		`- {`
`303`		`- "cell_type": "code",`
`304`		`- "execution_count": null,`
`305`		`- "metadata": {`
`306`		`- "collapsed": false`
`307`		`- },`
`308`		`- "outputs": [],`
`309`		`- "source": []`
`310`	`301`	`}`
`311`	`302`	`],`
`312`	`303`	`"metadata": {`
Original file line number	Diff line number	Diff line change
`@@ -297,7 +297,7 @@`
`297`	`297`	`"# fileObj will be closed when leaving the block\n",`
`298`	`298`	`"with open( \"data/datafile.txt\" ) as fileObj:\n",`
`299`	`299`	`" for ( i, line ) in enumerate( fileObj, start = 1 ):\n",`
`300`		`- " print(\"%s: %r\" % ( i, line ))"`
	`300`	`+ " print( i, line.strip() )"`
`301`	`301`	`]`
`302`	`302`	`},`
`303`	`303`	`{`