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Update page 'Day 3 Homework - Karen'

Karenzz
2023-04-03 16:11:15 +02:00
parent 0ebbbc79ad
commit 72917a61d6
1 changed files with 64 additions and 10 deletions
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Day 3 Homework - Karen.md
+64 -10
@@ -22,16 +22,70 @@ class BoundedInt():
self.max = max self.max = max
``` ```
​ ​
1. Read this: https://docs.python.org/3/reference/datamodel.html?highlight=__int__#object.__int__ **1. Read this: https://docs.python.org/3/reference/datamodel.html?highlight=__int__#object.__int__**
2. Modify the template to pass test 1, which checks that `int()` called on your class will return the value of `i`.
3. Read this, and the paragraph below it: https://docs.python.org/3/reference/datamodel.html?highlight=__int__#object.__add__ **2. Modify the template to pass test 1, which checks that `int()` called on your class will return the value of `i`.**
4. What do you think the types of x and y are? Guess, without checking first. What are they, actually? You can use the debugger's local window to find out. ```
5. Don't forget that you can access the value of a BoundedInt by using either `.i` on it, or `int()`, now that you've passed test 1. class BoundedInt():
6. Modify the template to pass test 2, which checks that: def __init__(self, i, min, max):
"""
Create a bounded integer.
Args:
i (int): The initial value of the integer.
min (int): The minimum value of the integer.
max (int): The maximum value of the integer.
"""
'''
self.i = max if i > max else min if i < min else i
self.min = min
self.max = max
```
It's the first draft I have made to meet the requirement; however, the result returns to be "❌ Test 2 failed!", so I want to check i to see what happends to this result and the modified `BoundedInt` is shown as:
```
class BoundedInt():
def __init__(self, i, min, max):
"""
Create a bounded integer.
Args:
i (int): The initial value of the integer.
min (int): The minimum value of the integer.
max (int): The maximum value of the integer.
"""
'''
self.i = max if i > max else min if i < min else i
self.min = min
self.max = max
'''
if i < min or i > max:
raise ValueError(f"Initial value {i} is outside the range [{min}, {max}]")
self.i = i
self.min = min
self.max = max
def __int__(self):
return self.i
```
The result after runnning this modified script says "Initial value 3735928559 is outside the range [10, 0]". If we change the range defined in `BoundedIntTester` to be [0, 1000000000000], then it will return "✅ Test 1 passed!".
**3. Read this, and the paragraph below it: https://docs.python.org/3/reference/datamodel.html?highlight=__int__#object.__add__**
**4. What do you think the types of x and y are? Guess, without checking first. What are they, actually? You can use the debugger's local window to find out.**
**5. Don't forget that you can access the value of a BoundedInt by using either `.i` on it, or `int()`, now that you've passed test 1.**
**6. Modify the template to pass test 2, which checks that:**
* Your class implements the + operator. * Your class implements the + operator.
* It throws ValueError when attempting to add another BoundedInt that would exceed `self.max`. * It throws ValueError when attempting to add another BoundedInt that would exceed `self.max`.
7. Do the same as 6, but for subtraction, to pass test 3.
8. Modify the template so it also supports adding a regular integer to a BoundedInt, to pass test 4. Note that you can use `isinstance()` to determine the class of a variable. **7. Do the same as 6, but for subtraction, to pass test 3.**
9. Same as 8, but for subtraction.
10. You don't have to implement the code, but think about how you would change the template so it could allow adding a BoundedInt to an emoji, if there was a hypothetical function sentiment(emoji) which returned a floating point number from -10.0 to 10.0 which indicated whether the emoji was happy or sad. e.g. BoundedInt(1, min = 1, max = 10) + 😁 would raise `ValueError`. **8. Modify the template so it also supports adding a regular integer to a BoundedInt, to pass test 4. Note that you can use `isinstance()` to determine the class of a variable.**
**9. Same as 8, but for subtraction.**
**10. You don't have to implement the code, but think about how you would change the template so it could allow adding a BoundedInt to an emoji, if there was a hypothetical function sentiment(emoji) which returned a floating point number from -10.0 to 10.0 which indicated whether the emoji was happy or sad. e.g. BoundedInt(1, min = 1, max = 10) + 😁 would raise `ValueError`.**
​ ​