Merge remote-tracking branch 'balazs/master'

balazs/python-the-hard-way/ex32/notes_n_drills.org

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+* Drills
+
+** Take a look at how you used range . Look up the range function to understand it.
+
+tldr, a "function" that generates a sequence of numbers:
+
+
+ class range(start, stop[, step]):
+start
+
+    The value of the start parameter (or 0 if the parameter was not supplied)
+
+stop
+
+    The value of the stop parameter
+
+step
+
+    The value of the step parameter (or 1 if the parameter was not supplied)
+
+-------
+
+I found it among python 3.8.3 built-in functions.
+
+but!
+
+Turns out it's not a function after all!
+
+It's an immutable sequence type.
+
+"a range object will always take the same (small) amount of memory" ... "as it only stores the start, stop and step values" and generates numbers on the fly
+
+note: similar in shell is: seq 
+source: https://docs.python.org/3/library/stdtypes.html#range
+
+** Could you have avoided that for-loop entirely on line 22 and just assigned range(0,6) directly to elements?
+Do you mean line 21 book? (typo)
+
+Yes! Because range will generate a list that can be appended added as is.
+** Find the Python documentation on lists and read about them. What other operations can you do to lists besides append?
+
+extend, insert, remove, pop, clear, index, count, sort, reverse, copy
+
+fascinating! programming is cool! you can do so much with it

balazs/python-the-hard-way/ex33/ex33.py

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+#i = 0
+numbers = []
+
+def counter(i2, INC_BY):
+    
+    i = 0
+    
+    while i < i2 :
+        print(f"At the top i is {i}")
+        numbers.append(i)
+
+        i = i + INC_BY
+
+        print("Nums now:", numbers)
+        print(f"At the bottom i is {i}")
+
+print("The numbers: ")
+
+for num in numbers:
+    print(num)
+
+counter(2, 2)

balazs/python-the-hard-way/ex34/notes_n_drills.org

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+* Drills
+
+** With what you know of the difference between these types of numbers, can you explain why the year 2010 in ”January 1, 2010,” really is 2010 and not 2009? (Hint: you can’t pick years at random.)
+
+What is this question? :/
+

balazs/python-the-hard-way/ex35/ex35.py

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+from sys import exit
+import time
+
+def gold_room():
+    print("This room is full of gold. How much do you take?")
+
+    choice = input("> ")
+    if "0" in choice or "1" in choice:
+        how_much = int(choice)
+    else:
+        dead("Man, learn to type a number.")
+
+    if how_much < 50:
+        print("Nice, you're not greedy, you win!")
+        exit(0)
+    else:
+        dead("You greedy bastard!")
+
+
+def bear_room():
+    print("There is bear here.")
+    print("The bear has a bunch of honey.")
+    print("The fat bear is in front of another door.")
+    print("How are you going to move the bear?")
+    bear_moved = False
+
+    while True:
+        choice = input("> ")
+
+        if choice == "take honey":
+            dead("The bear looks at you then slaps your face off.")
+        elif choice == "taunt bear" and not bear_moved:
+            print("The bear has moved from the door.")
+            print("You can go through it now.")
+            bear_moved = True
+        elif choice == "tea" and not bear_moved:
+            print("You have invited the bear for a tea.")
+            time.sleep(1)
+            print("The bear is happy and moved.")
+            bear_moved = True
+        elif choice == "taunt bear" and bear_moved:
+            dead("The bear gets pissed off and chews your leg off.")
+        elif choice == "open door" and bear_moved:
+            gold_room()
+        else:
+            print("I got no idea what that means.")
+
+
+def cthulhu_room():
+    print("Here you see the great evil Cthulhu.")
+    print("He, it, whatever stares at you and you go insane.")
+    print("Do you flee for your life or eat your head?")
+
+    choice = input("> ")
+
+    if "flee" in choice:
+        start()
+    elif "head" in choice:
+        dead("Well that was tasty!")
+    else:
+        cthulhu_room()
+
+
+def dead(why):
+    print(why, "Good job!")
+    exit(0)
+
+
+def start():
+    print("You are in a dark room.")
+    print("There is a door to your right and left.")
+    print("Which one do you take?")
+
+    choice = input("> ")
+
+    if choice == "left":
+        bear_room()
+    elif choice == "right":
+        cthulhu_room()
+    else:
+        dead("You stumble around the room until you starve.")
+
+
+start()

balazs/python-the-hard-way/ex35/notes_n_drills.org

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+*Drills
+
+** The gold_room has a weird way of getting you to type a number. What are all the bugs in this way of doing it? Can you make it better than what I’ve written? Look at how int() works for clues.
+
+Non greedy is less than 50 but only 1 and 0 qualify. 
+
+Nicer ways:
+-> check for numbers
+-> also check for None and All strings
+-> sanitize input for int(), (int can take 2 variables)