Merge pull request #35 from code-for-tomorrow/ch11-exercises

Add remove_duplicates.py to Ch.11

Author: abhatia1205

1_beginner/chapter3/solutions/temperature.py

@@ -1,4 +1,4 @@
-  # Temperature
+# Temperature
 # Write a program that converts Celsius to Fahrenheit.
 # It should ask the user for the temperature in
 # degrees Celsius and then print the temperature in degrees Fahrenheit.

1_beginner/chapter5/practice/add_all_the_way.py

@@ -7,6 +7,4 @@
 # write code here
 
 
-
-
-#Try using the other loop and do the same p[roblem again
+# Try using the other loop and do the same p[roblem again

1_beginner/chapter5/practice/alternating.py

@@ -9,9 +9,9 @@
 
 """
 
-#Write code here.
+# Write code here.
 
 number = int(input("Enter Number Here: "))
 
 
-#Now try it with a while loop
+# Now try it with a while loop

1_beginner/chapter5/practice/fibonnaci.py

@@ -1,4 +1,4 @@
-''' CHALLENGE PROBLEM!! NOT FOR THE FAINT OF HEART!
+""" CHALLENGE PROBLEM!! NOT FOR THE FAINT OF HEART!
 
 The Fibonacci numbers, discovered by Leonardo di Fibonacci,
 is a sequence of numbers that often shows up in mathematics and,
@@ -12,9 +12,9 @@
 
 The challenge is to use a for loop (not recursion, if you know what that is),
 to find the 100th Fibonnaci number.
-'''
+"""
 
-#write code here
+# write code here
 
 
-#Can you do it with a while loop?
+# Can you do it with a while loop?

1_beginner/chapter5/practice/prime.py

@@ -9,7 +9,7 @@
 
 """
 
-#write code here
+# write code here
 
 numer = int(input("Enter number here: "))
 
@@ -25,4 +25,4 @@
 
 """
 
-#write code here
+# write code here

1_beginner/chapter5/practice/series.py

@@ -13,4 +13,4 @@
 Also, try adding up 1 -1/3 + 1/5 - 1/7 + 1/9 - 1/11 ... 10 million times. then
 multiply this result by 4. What number is this close to?
 
-"""
+"""

2_intermediate/chapter10/practice/img_avg.py

@@ -37,10 +37,10 @@
 plt.imshow(img)
 plt.show()
 
-#write code to create newimg here
+# write code to create newimg here
 
 plt.imshow(newimg)
 plt.show()
 
 plt.imshow(transpose)
-plt.show()
+plt.show()

2_intermediate/chapter10/solutions/img_avg.py

@@ -35,50 +35,48 @@
 transpose = numpy.transpose(img)
 
 
-#write code to create newimg here
+# write code to create newimg here
 def solution1():
-	"""Iterating over the image here. i is a variable from 0 to the width of the image.
+    """Iterating over the image here. i is a variable from 0 to the width of the image.
 	j is a variable that ranges from 0 to the height of the image. i is associated with
 	values"""
-	for i in range(len(img)):
-		for j in range(len(img[0])):
-			x_n = [0]
-			y_n = [0]
-
-			if(i == 0):
-				x_n.append(1)
-			elif(i ==  len(img)-1):
-				x_n.append(-1)
-			else:
-				x_n.append(1)
-				x_n.append(-1)
-
-			if(j == 0):
-				y_n.append(1)
-			elif(j ==  len(img[0])-1):
-				y_n.append(-1)
-			else:
-				y_n.append(1)
-				y_n.append(-1)
-
-			r_avg = -1*img[i][j][0]
-			g_avg = -1*img[i][j][1]
-			b_avg = -1*img[i][j][2]
-			c = -1
-
-			for x in x_n:
-				for y in y_n:
-					r_avg += img[i+x][j+y][0]
-					g_avg += img[i+x][j+y][1]
-					b_avg += img[i+x][j+y][2]
-					c+=1
-			r_avg = r_avg/c
-			g_avg = g_avg/c
-			b_avg = b_avg/c
-
-			newimg[i][j] = [r_avg, g_avg, b_avg]
-
-
+    for i in range(len(img)):
+        for j in range(len(img[0])):
+            x_n = [0]
+            y_n = [0]
+
+            if i == 0:
+                x_n.append(1)
+            elif i == len(img) - 1:
+                x_n.append(-1)
+            else:
+                x_n.append(1)
+                x_n.append(-1)
+
+            if j == 0:
+                y_n.append(1)
+            elif j == len(img[0]) - 1:
+                y_n.append(-1)
+            else:
+                y_n.append(1)
+                y_n.append(-1)
+
+            r_avg = -1 * img[i][j][0]
+            g_avg = -1 * img[i][j][1]
+            b_avg = -1 * img[i][j][2]
+            c = -1
+
+            for x in x_n:
+                for y in y_n:
+                    r_avg += img[i + x][j + y][0]
+                    g_avg += img[i + x][j + y][1]
+                    b_avg += img[i + x][j + y][2]
+                    c += 1
+            r_avg = r_avg / c
+            g_avg = g_avg / c
+            b_avg = b_avg / c
+
+            newimg[i][j] = [r_avg, g_avg, b_avg]
 
 
 solution1()
@@ -87,4 +85,4 @@ def solution1():
 plt.show()
 
 plt.imshow(transpose)
-plt.show()
+plt.show()

2_intermediate/chapter11/practice/remove_duplicates.py

@@ -0,0 +1,15 @@
+# Write a function called remove_duplicates
+# The sole parameter of the function should be a list
+# The function should look through a list,
+# Find all duplicate elements, and remove them
+# Sort the resulting list
+# YOU MAY NOT USE THE set() function IN PYTHON.
+# Hint: To sort a list, use sorted(list)
+# Another hint: Use dict.removekeys(list)
+# To take the elements from a list,
+# and convert them to keys in a dictionary
+
+# Example: array = [1,1,2,5,4,6,12,3,4,6]
+# Result should print [1,2,3,4,5,6,12]
+
+# Write code here

2_intermediate/chapter11/solutions/remove_duplicates.py

@@ -0,0 +1,32 @@
+# Write a function called remove_duplicates
+# The sole parameter of the function should be a list
+# The function should look through a list,
+# Find all duplicate elements, and remove them
+# Sort the resulting list
+# YOU MAY NOT USE THE set() function IN PYTHON.
+# Hint: To sort a list, use sorted(list)
+# Another hint: Use dict.fromkeys(list)
+# To take the elements from a list,
+# and convert them to keys in a dictionary
+
+# Example: array = [1,1,2,5,4,6,12,3,4,6]
+# Result should print [1,2,3,4,5,6,12]
+
+# Write code here
+
+list1 = [1, 1, 2, 5, 4, 6, 12, 3, 4, 6]  # Define your list
+
+
+# Define your Function
+def remove_duplicates(array):
+    my_list = list(dict.fromkeys(array))
+    # Converts the list into a dictionary.
+    # Fromkeys(array) turns each item into a key
+    # There cannot be multiple keys,
+    # So all the duplicate keys are removed
+    # Convert the keys back into a list
+    return sorted(my_list)
+    # Returns the sorted list of keys that are not duplicate.
+
+
+print(remove_duplicates(list1))  # Call the function