Few adjustments in Chapter 4

Author: Ricardo Duarte

Chapter4/Chapter4_Loops.ipynb

@@ -4,12 +4,12 @@
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       "[Python for Developers](http://ricardoduarte.github.io/python-for-developers/#content)\n",
       "===================================\n",
@@ -25,7 +25,7 @@
       "---\n",
       "It is the repetition structure most often used in the Python. The statement accepts not only static\u00a0sequences, but also sequences generated by iterators. Iterators are structures that allow iterations, ie access to items of a collection of elements, sequentially.\n",
       "\n",
-      "![Loop Example](files/bpypd_diags3.png)\n",
+      "![Loop Example](files/bpyfd_diags3.png)\n",
       "\n",
       "During the execution of a *for* loop , the reference points to an element in the sequence. At each iteration, the reference is updated, in order to the *for* code block to process the corresponding element.\n",
       "\n",
@@ -54,6 +54,7 @@
       "print s"
      ],
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+     "metadata": {},
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        "output_type": "stream",
@@ -67,8 +68,9 @@
     },
     {
      "cell_type": "markdown",
+     "metadata": {},
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-      "The function `range (m, n, p)`, is very useful in loops, as it returns a list of integers starting at `m` through smaller than\u00a0`n` in steps of length `p`, which can be used as the order for the loop.\n",
+      "The function `range(m, n, p)`, is very useful in loops, as it returns a list of integers starting at `m` through smaller than\u00a0`n` in steps of length `p`, which can be used as the order for the loop.\n",
       "\n",
       "While\n",
       "-----\n",
@@ -102,6 +104,7 @@
       "print s"
      ],
      "language": "python",
+     "metadata": {},
      "outputs": [
       {
        "output_type": "stream",
@@ -115,6 +118,7 @@
     },
     {
      "cell_type": "markdown",
+     "metadata": {},
      "source": [
       "The *while* loop is appropriate when there is no way to determine how many iterations will occur and there is a sequence to follow."
      ]
@@ -124,6 +128,7 @@
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+     "metadata": {},
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@@ -200,7 +205,8 @@
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-   ]
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 }