Merge branch 'master' of ssh://86thumbs.net:3022/waldek/python_course_doc

.gitignore

@@ -1,3 +1,4 @@
+*.swp
 *.pdf
 *.docx
 .~lock*

examples/string_format.py

@@ -0,0 +1,18 @@
+# Basic placeholders
+
+ingredient = "sugar"
+quantity = "500g"
+
+ingredient_string = "- {}: {}".format(ingredient, quantity)
+
+print(ingredient_string)
+
+
+# Named placeholders
+
+fname = "John"
+lname = "Doe"
+
+bond_string = "My name is {lastname}, {firstname} {lastname}".format(firstname=fname, lastname=lname)
+
+print(bond_string)

learning_python3.md

@@ -420,7 +420,60 @@ else:
 
 # A text based adventure game
 
-TODO mini text based adventure game to point out the complexity of conditional logic and flow control
+We can use conditional logic to create quite elaborate decision processes.
+Let's build a mini text based adventure game.
+Granted it's not a *tripple A* game but it will train your `if` and `else` skills plus it will highlight some issues we'll overcome in the next section.
+Consider the diagram below.
+
+![adventure game](./assets/text_based_adventure_game.png)
+
+```python3
+answer = input("You're at a cross section. Do you go left or right?")
+if answer.startswith("l"):
+    answer = input("Down this hall you encounter a bear. Do you fight it?")
+    if answer.startswith("y"):
+        print("The bear counter attack! He kills you")
+        print("game over!")
+        exit(0)
+    elif answer.startswith("n"):
+        print("It's a friendly bear! He transforms into a wizard!")
+        answer = input("The wizard asks you if you know the meaning of life?")
+        if answer == "42":
+            print("He knods approuvingly and upgrades you to wizard status!")
+            print("You win!")
+            exit(0)
+        else:
+            print("He shakes his head in disbelief. You fool!")
+            print("game over!")
+    else:
+        print("that's not a valid choice...")
+        print("game over!")
+        exit(0)
+elif answer.startswith("r"):
+    answer = input("Down this hall you find some mushrooms. Do you eat them?")
+    if answer.startswith("n"):
+        print("You starve to dead...")
+        print("game over!")
+        exit(0)
+    elif answer.startswith("y"):
+        print("A wizard apprears out of thin air!")
+        answer = input("The wizard asks you if you know the meaning of life?")
+        if answer == "42":
+            print("He knods approuvingly and upgrades you to wizard status!")
+            print("You win!")
+            exit(0)
+        else:
+            print("He shakes his head in disbelief. You fool!")
+            print("game over!")
+    else:
+        print("that's not a valid choice...")
+        print("game over!")
+        exit(0)
+    pass
+else:
+    print("game over!")
+    exit(0)
+```
 
 # Creating your own functions