Add python files

thinkcspy/Chapter-10-Exercises/Python-files/Problem11.py

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+# Runestone.Academy thinkcspy course
+# Chapter 10
+# Problem 11
+
+def sumUntilEven(lst):
+    # your code here
+    sumlist = 0
+    
+    for num in lst:
+        if num % 2 != 0:
+            sumlist += num
+        else:
+            return sumlist
+        
+    return sumlist
+
+mylist = [15, 85, 11, 20, 27, 38, 13]
+oddlist = [13, 11, 29, 37]
+
+print(sumUntilEven(mylist))
+print(sumUntilEven(oddlist))

thinkcspy/Chapter-10-Exercises/Python-files/Problem12.py

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+# Runestone.Academy thinkcspy course
+# Chapter 10
+# Problem 12
+
+def count(lst):
+    # your code here
+    wordCount = 0
+    
+    for item in lst:
+        if type(item) is str:
+            if item != "sam":
+                wordCount += 1
+            else:
+                wordCount += 1
+                return wordCount
+            
+    return wordCount
+
+myList = ["apple", 5, 6, True, "purple", False, "mushroom", 11, "gen-x", "sam", 7, 10, "cause", "interim"]
+
+print(count(myList))

thinkcspy/Chapter-10-Exercises/Python-files/Problem13.py

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+# Runestone.Academy thinkcspy course
+# Chapter 10
+# Problem 13
+
+def count(lst):
+    count = 0
+    
+    for num in lst:
+        count += 1
+        
+    return count
+
+    
+def findIn(item, lst):
+    pos = 0
+    inLst = False
+    
+    while pos < len(lst) and not inLst:
+        if lst[pos] == item:
+            inLst = True
+        else:
+            pos += 1
+            
+    return inLst
+            
+     
+def reverse(lst):
+    newlist = []
+    
+    for num in lst:
+        newlist = [num] + newlist
+        
+    return newlist
+    
+    
+def index(item, lst):
+    pos = 0
+    
+    for num in lst:
+        if num == item:
+            return pos
+        else:
+            pos += 1
+            
+    return "Item not found."
+
+
+def insert(pos, item, lst):
+    
+    newlst = lst[:pos] + [item] + lst[pos:]
+    
+    return newlst
+
+
+myList = ["apple", 5, 6, True, "purple", False, "mushroom", 11, "gen-x", "sam", 7, 10, "cause", "interim"]
+
+print(count(myList))
+print(findIn("purple", myList))
+print(findIn(99, myList))
+print(reverse(myList))
+print(index(False, myList))
+print(index("jello", myList))
+print(insert(5, 7.89, myList))

thinkcspy/Chapter-10-Exercises/Python-files/Problem14.py

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+# Runestone.Academy thinkcspy course
+# Chapter 10
+# Problem 14
+
+def replace(s, old, new):
+    # your code here
+    newStr = s.split(old)
+    newStr = new.join(newStr)
+    
+    return newStr
+
+
+s = 'I love spom!  Spom is my favorite food.  Spom, spom, spom, yum!'
+print(replace('Mississippi', 'i', 'I'))
+print(replace(s, 'om', 'am'))
+print(replace(s, 'o', 'a'))

thinkcspy/Chapter-10-Exercises/Python-files/Problem15.py

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+# Runestone.Academy thinkcspy course
+# Chapter 10
+# Problem 15
+
+import turtle
+
+def createLSystem(numIters,axiom):
+    startString = axiom
+    endString = ""
+    for i in range(numIters):
+        endString = processString(startString)
+        startString = endString
+
+    return endString
+
+def processString(oldStr):
+    newstr = ""
+    for ch in oldStr:
+        newstr = newstr + applyRules(ch)
+
+    return newstr
+
+def applyRules(ch):
+    newstr = ""
+    if ch == 'H':
+        newstr = 'HFX[+H][-H]'   # Rule 1
+    elif ch == 'X':
+        newstr = 'X[-FFF][+FFF]FX'   # Rule 2
+    else:
+        newstr = ch    # no rules apply so keep the character
+
+    return newstr
+
+def drawLsystem(aTurtle, instructions, angle, distance):
+    savedInfoList = []
+    for cmd in instructions:
+        if cmd == 'F':
+            aTurtle.forward(distance)
+        elif cmd == 'B':
+            aTurtle.backward(distance)
+        elif cmd == '+':
+            aTurtle.right(angle)
+        elif cmd == '-':
+            aTurtle.left(angle)
+        elif cmd == '[':
+            savedInfoList.append([aTurtle.heading(), aTurtle.xcor(), aTurtle.ycor()])
+            print(savedInfoList)
+        elif cmd == ']':
+            newInfo = savedInfoList.pop()
+            aTurtle.setheading(newInfo[0])
+            aTurtle.setposition(newInfo[1], newInfo[2])
+
+def main():
+    inst = createLSystem(6, "H")   # create the string
+    print(inst)
+    t = turtle.Turtle()            # create the turtle
+    wn = turtle.Screen()
+    wn.tracer(10)
+
+    t.up()
+    t.back(200)
+    t.down()
+    t.speed(0)
+    drawLsystem(t, inst, 25.7, 5)   # draw the picture
+                                  # angle 2, segment length 5
+    wn.exitonclick()
+
+main()

thinkcspy/Chapter-10-Exercises/Python-files/Problem16.py

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+import turtle
+
+def createLSystem(numIters,axiom):
+    startString = axiom
+    endString = ""
+    for i in range(numIters):
+        endString = processString(startString)
+        startString = endString
+
+    return endString
+
+def processString(oldStr):
+    newstr = ""
+    for ch in oldStr:
+        newstr = newstr + applyRules(ch)
+
+    return newstr
+
+def applyRules(ch):
+    newstr = ""
+    if ch == 'F':
+        newstr = 'F[-F]F[+F]F'   # Rule 1
+    else:
+        newstr = ch    # no rules apply so keep the character
+
+    return newstr
+
+def drawLsystem(aTurtle, instructions, angle, distance):
+    savedInfoList = []
+    for cmd in instructions:
+        if cmd == 'F':
+            aTurtle.forward(distance)
+        elif cmd == 'B':
+            aTurtle.backward(distance)
+        elif cmd == '+':
+            aTurtle.right(angle)
+        elif cmd == '-':
+            aTurtle.left(angle)
+        elif cmd == '[':
+            savedInfoList.append([aTurtle.heading(), aTurtle.xcor(), aTurtle.ycor()])
+            print(savedInfoList)
+        elif cmd == ']':
+            newInfo = savedInfoList.pop()
+            aTurtle.setheading(newInfo[0])
+            aTurtle.setposition(newInfo[1], newInfo[2])
+
+def main():
+    inst = createLSystem(5, "F")   # create the string
+    print(inst)
+    t = turtle.Turtle()            # create the turtle
+    wn = turtle.Screen()
+    wn.tracer(10)
+
+    t.up()
+    t.back(600)
+    t.down()
+    t.speed(0)
+    drawLsystem(t, inst, 25, 5)   # draw the picture
+                                  # angle 25, segment length 5
+    wn.exitonclick()
+
+main()

thinkcspy/Chapter-10-Exercises/Python-files/Problem3.py

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+# Runestone.Academy thinkcspy course
+# Chapter 10
+# Problem 3
+
+myList = [76, 92.3, 'hello', True, 4, 76]
+
+# Your code here
+
+myList += ["apple"]
+myList.insert(3, "cat")
+myList.insert(0, 99)
+print(myList)
+
+print(myList.index("hello"))
+print(myList.count(76))
+
+myList.remove(76)
+myList.pop(myList.index(True))
+
+print(myList)