Adding Lecture 6

cs171/Lect06/counting.py

+
+
+def countUp(low, high, step=1):
+    while low <= high:
+        print(low)
+        low += step
+        
+def countDown(high, low=1, step=1):
+    ''' Good place to define step to be a non-negative int'''
+    while high >= low:
+        print(high)
+        high -= step
+    
+    
+# countUp(1, 10)
+countUp(10, 100, 10)
+
+#countDown(50, 25, 5)
+#countDown(int(input("Count down from what: ")))
+
+myText = "I like the Drexel Dragon, whose name is Mario"
+myWords = myText.split()
+print(myWords)
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cs171/Lect06/hello.py

+print("hello again")
+
+def golfWinner(left, right):
+    print("We have two bad golfers...")
+    if left < right:
+        return "Left"
+    else:
+        return "Right"
+    print("Thank you for playing")
+
+def golf(left=0, right=0):
+    if left < right:
+        print("Left wins")
+    else:
+        print("Right wins")
+        
+def sum(left, right):
+    return left + right
+
+
+            #Parameter
+def sayHello(dayName):						# Begin Definition
+    print("It is a ", dayName)
+    print("This is your lecture")
+    print("microphone")
+    print("Oh, and hello")			# End Definition
+ 
+        #Argument
+todayIs = "Monday"
+sayHello("Tuesday") # Call Function
+
+print(golfWinner(100, 200))
+

cs171/Lect06/import.py

+from scope import doSomething
+
+doSomething("Something")
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cs171/Lect06/nested.py

+
+
+def sum(a, b):
+    return a + b
+
+def mul(a, b):
+    return a * b
+
+print(sum(mul(18, sum(3, 0)), sum(mul(2, 2), 4)))
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cs171/Lect06/scope.py

+
+
+def doSomething(text, endChar=''):
+    print(text.upper() + endChar)
+    print(value)
+ 
+if __name__ == '__main__':
+    value = 10
+    doSomething("hello", '!')
+    print(value)

cs171/Lect06/swap.py

+
+
+def family():
+    ''' Returns a tuple of family member '''
+    return ("Mother", "Father", "Brother")
+
+def swap(myList):
+    temp = myList[1]
+    myList[1] = myList[0]
+    myList[0] = temp
+    return myList
+
+def lazySwap(yourList):
+    ''' Exchanges the values in the first two positions of the list'''
+    yourList[0], yourList[1] = yourList[1], yourList[0]
+
+member1, member2, member3 = family()
+
+print(swap(["Red", "Green"]))
+
+theirList = ["Philadelphia", "Pennsylvania"]
+lazySwap(theirList)
+print(theirList)

cs172/Lect06/PQ.py

+from queue import PriorityQueue
+
+pq = PriorityQueue()
+
+pq.put((1, "One"))
+pq.put((10, "Ten"))
+
+print(pq.get())
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cs172/Lect06/hello.py

+from queue import Queue, LifoQueue
+
+myQueue = Queue()
+myStack = LifoQueue()
+
+myQueue.put(5)
+myQueue.put(10)
+
+myStack.put(5)
+myStack.put(10)
+
+while not myStack.empty():
+    print(myStack.get())
+
+#print(myQueue)
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cs172/Lect06/myqueue.py

+class myQueue:
+    
+    def __init__(self):
+        self.__contents = []
+    
+    def get(self):
+        return self.__contents.pop(0)
+    
+    def put(self, thing):
+        self.__contents.append(thing)
+    
+    def empty(self):
+        return len(self.__contents) == 0
+    
+    def clear(self):
+        self.__contents = []
+    
+    def __str__(self):
+        return str(self.__contents)
+    
+if __name__ == "__main__":
+    testQueue = myQueue()
+    testQueue.put(5)
+    testQueue.put(10)
+    
+    # testQueue.clear()
+    
+    print(testQueue)
+    print(testQueue.empty())
+    
+    print(testQueue.get())
+    print(testQueue)
+

cs172/Lect06/mystack.py

+class MyStack:
+    
+    def __init__(self):
+        self.__contents = []
+    
+    def get(self):
+        return self.__contents.pop()
+    
+    def put(self, thing):
+        self.__contents.append(thing)
+    
+    def empty(self):
+        return len(self.__contents) == 0
+    
+    def clear(self):
+        self.__contents = []
+    
+    def __str__(self):
+        return str(self.__contents)
+    
+if __name__ == "__main__":
+    testStack = MyStack()
+    testStack.put(5)
+    testStack.put(10)
+    
+    # testStack.clear()
+    
+    print(testStack)
+    print(testStack.empty())
+    
+    print(testStack.get())
+    print(testStack)