Remove .md and image files and move python files into main chapter folders

thinkcspy/Chapter-10-Exercises/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))