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Merge in "release-0.6.6"

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Merge branch "release-0.6.6" into "develop"

Summary of the merged in commits:
 * 6d1d394: Refurbish chapter 06
 * 3ca88a8: Streamline presentation
 * d9c11c5: Streamline presentation
This commit is contained in:
Alexander Hess 2020-03-16 20:58:21 +01:00
commit d3221be9d6
8 changed files with 5487 additions and 1705 deletions
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26
01_elements_00_lecture.ipynb
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@ -1308,7 +1308,7 @@
}
},
"source": [
"The `c` object is a so-called **string** type (i.e., `str`), which is Python's way of representing \"text.\" Strings also come with peculiar behaviors, for example, to convert a text to lower, upper, or title case."
"The `c` object is a so-called **string** type (i.e., `str`), which is Python's way of representing \"text.\" Strings also come with peculiar behaviors, for example, to make a text lower or upper case."
]
},
{
@ -1383,30 +1383,6 @@
"c.upper()"
]
},
{
"cell_type": "code",
"execution_count": 41,
"metadata": {
"slideshow": {
"slide_type": "skip"
}
},
"outputs": [
{
"data": {
"text/plain": [
"'Python Rocks'"
]
},
"execution_count": 41,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"c.title()"
]
},
{
"cell_type": "markdown",
"metadata": {

4
03_conditionals_02_exercises.ipynb
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@ -19,7 +19,7 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"Read [Chapter 3](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/master/03_conditionals_00_lecture.ipynb) of the book. Then, work through the exercises below."
"Read [Chapter 3](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/master/03_conditionals_00_lecture.ipynb) of the book. Then, work through the exercises below. The `...` indicate where you need to fill in your answers. You should not need to create any additional code cells."
]
},
{
@ -136,7 +136,7 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"**Q1.4**: Looking at the `if`-`else`-logic in the function, why do you think the four example line items in **Q9.2** were chosen as they were?"
"**Q1.4**: Looking at the `if`-`else`-logic in the function, why do you think the four example line items in **Q1.2** were chosen as they were?"
]
},
{

2
04_iteration_00_lecture.ipynb
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@ -52,7 +52,7 @@
"cell_type": "markdown",
"metadata": {
"slideshow": {
"slide_type": "-"
"slide_type": "slide"
}
},
"source": [

3216
05_numbers_00_lecture.ipynb
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22
05_numbers_02_exercises.ipynb
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@ -19,7 +19,7 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"Read [Chapter 5](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/master/05_numbers_00_lecture.ipynb) of the book. Then, work through the exercises below."
"Read [Chapter 5](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/master/05_numbers_00_lecture.ipynb) of the book. Then, work through the exercises below. The `...` indicate where you need to fill in your answers. You should not need to create any additional code cells."
]
},
{
@ -33,20 +33,20 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"**Q1** in [Chapter 2's Exercises](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/master/02_functions_02_exercises.ipynb#Volume-of-a-Sphere) section already revealed that we must consider the effects of the `float` type's imprecision.\n",
"The \"*Volume of a Sphere*\" problem in [Chapter 2's Exercises](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/master/02_functions_02_exercises.ipynb#Volume-of-a-Sphere) section revealed that we must consider the effects of the `float` type's imprecision.\n",
"\n",
"This becomes even more important when we deal with numeric data modeling accounting or finance data (cf., [this comment](https://stackoverflow.com/a/24976426) on \"falsehoods programmers believe about money\").\n",
"\n",
"In addition to the *inherent imprecision* of numbers in general, the topic of **[rounding numbers](https://en.wikipedia.org/wiki/Rounding)** is also not as trivial as we might expect! [This article](https://realpython.com/python-rounding/) summarizes everything the data science practitioner needs to know.\n",
"\n",
"In this exercise, we revisit **Q1** from [Chapter 3's Exercises](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/master/03_conditionals_02_exercises.ipynb#Discounting-Customer-Orders) section, and make the `discounted_price()` function work *correctly* for real-life sales data."
"In this exercise, we revisit the \"*Discounting Customer Orders*\" problem from [Chapter 3's Exercises](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/master/03_conditionals_02_exercises.ipynb#Discounting-Customer-Orders) section and make the `discounted_price()` function work *correctly* for real-life sales data."
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"**Q1.1**: Execute the code cells below! What results would you have *expected*, and why?"
"**Q1**: Execute the code cells below! What results would you have *expected*, and why?"
]
},
{
@ -87,7 +87,7 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"**Q1.2**: The built-in [round()](https://docs.python.org/3/library/functions.html#round) function implements the \"**[round half to even](https://en.wikipedia.org/wiki/Rounding#Round_half_to_even)**\" strategy. Describe in one or two sentences what that means!"
"**Q2**: The built-in [round()](https://docs.python.org/3/library/functions.html#round) function implements the \"**[round half to even](https://en.wikipedia.org/wiki/Rounding#Round_half_to_even)**\" strategy. Describe in one or two sentences what that means!"
]
},
{
@ -101,7 +101,7 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"**Q1.3**: For the revised `discounted_price()` function, we have to tackle *two* issues: First, we have to replace the built-in `float` type with a data type that allows us to control the precision. Second, the discounted price should be rounded according to a more human-friendly rounding strategy, namely \"**[round half away from zero](https://en.wikipedia.org/wiki/Rounding#Round_half_away_from_zero)**.\"\n",
"**Q3**: For the revised `discounted_price()` function, we have to tackle *two* issues: First, we have to replace the built-in `float` type with a data type that allows us to control the precision. Second, the discounted price should be rounded according to a more human-friendly rounding strategy, namely \"**[round half away from zero](https://en.wikipedia.org/wiki/Rounding#Round_half_away_from_zero)**.\"\n",
"\n",
"Describe in one or two sentences how \"**[round half away from zero](https://en.wikipedia.org/wiki/Rounding#Round_half_away_from_zero)**\" is more in line with how humans think of rounding!"
]
@ -117,7 +117,7 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"**Q1.4**: We use the `Decimal` type from the [decimal](https://docs.python.org/3/library/decimal.html) module in the [standard library](https://docs.python.org/3/library/index.html) to tackle *both* issues simultaneously.\n",
"**Q4**: We use the `Decimal` type from the [decimal](https://docs.python.org/3/library/decimal.html) module in the [standard library](https://docs.python.org/3/library/index.html) to tackle *both* issues simultaneously.\n",
"\n",
"Assign `euro` a numeric object such that both `Decimal(\"1.5\")` and `Decimal(\"2.5\")` are rounded to `Decimal(\"2\")` (i.e., no decimal) with the [quantize()](https://docs.python.org/3/library/decimal.html#decimal.Decimal.quantize) method!"
]
@ -162,7 +162,7 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"**Q1.5**: Obviously, the two preceding code cells still [round half to even](https://en.wikipedia.org/wiki/Rounding#Round_half_to_even).\n",
"**Q5**: Obviously, the two preceding code cells still [round half to even](https://en.wikipedia.org/wiki/Rounding#Round_half_to_even).\n",
"\n",
"The [decimal](https://docs.python.org/3/library/decimal.html) module defines a `ROUND_HALF_UP` flag that we can pass as the second argument to the [quantize()](https://docs.python.org/3/library/decimal.html#decimal.Decimal.quantize) method. Then, it [rounds half away from zero](https://en.wikipedia.org/wiki/Rounding#Round_half_away_from_zero).\n",
"\n",
@ -200,7 +200,7 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"**Q1.6**: Instead of `euro`, define `cents` such that rounding occurs to *two* decimals! `Decimal(\"2.675\")` should now be rounded to `Decimal(\"2.68\")`. Do *not* forget to include the `ROUND_HALF_UP` flag!"
"**Q6**: Instead of `euro`, define `cents` such that rounding occurs to *two* decimals! `Decimal(\"2.675\")` should now be rounded to `Decimal(\"2.68\")`. Do *not* forget to include the `ROUND_HALF_UP` flag!"
]
},
{
@ -225,7 +225,7 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"**Q1.7**: Rewrite the function `discounted_price()` from [Chapter 3's Exercises](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/master/03_conditionals_02_exercises.ipynb#Discounting-Customer-Orders) section!\n",
"**Q7**: Rewrite the function `discounted_price()` from [Chapter 3's Exercises](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/master/03_conditionals_02_exercises.ipynb#Discounting-Customer-Orders) section!\n",
"\n",
"It takes the *positional* arguments `unit_price` and `quantity` and implements a discount scheme for a line item in a customer order as follows:\n",
"\n",
@ -264,7 +264,7 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"**Q1.8**: Execute the code cells below and verify the final price for the following four test cases:\n",
"**Q8**: Execute the code cells below and verify the final price for the following four test cases:\n",
"\n",
"- $7$ smartphones @ $99.00$ USD\n",
"- $3$ workstations @ $999.00$ USD\n",

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06_text_00_lecture.ipynb
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full_house.bin Normal file
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🂧🂷🃗🃎🃞

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umlauts.txt Normal file
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Lerchen-Lärchen-Ähnlichkeiten
fehlen. Dieses abzustreiten
mag im Klang der Worte liegen.
Merke, eine Lerch' kann fliegen,
Lärchen nicht, was kaum verwundert,
denn nicht eine unter hundert
ist geflügelt. Auch im Singen
sind die Bäume zu bezwingen.
Die Bätrachtung sollte reichen,
Rächtschreibfählern auszuweichen.
Leicht gälingt's, zu unterscheiden,
wär ist wär nun von dän beiden.