diff --git a/Calculator/Calcy.py b/Calculator/Calcy.py
index a1c0b5183f..6f51c2676b 100644
--- a/Calculator/Calcy.py
+++ b/Calculator/Calcy.py
@@ -13,28 +13,24 @@
 previous = 0
 run = True
 
-
 def performMath():
 global run
 global previous
- equation = ""
- if previous == 0:
- equation = input("Enter Equation:")
- else:
- equation = input(str(previous))
+ equation = input("Enter Equation: ")
 
 if equation == 'quit':
- print("GoodBye, Human..!")
+ print("Goodbye, Human..!")
 run = False
-
 else:
 equation = re.sub('[a-zA-Z,:()"{}"]', '', equation)
 
- if previous == 0:
- previous = eval(equation)
- else:
- previous = eval(str(equation) + equation)
-
+ try:
+ if previous == 0:
+ previous = eval(equation)
+ else:
+ previous = eval(str(previous) + equation)
+ except Exception as e:
+ print("Invalid equation. Please try again.")
 
 while run:
 performMath()
diff --git a/DSA-Python/Algorithms/QuickSort.py b/DSA-Python/Algorithms/QuickSort.py
new file mode 100644
index 0000000000..675a9970aa
--- /dev/null
+++ b/DSA-Python/Algorithms/QuickSort.py
@@ -0,0 +1,54 @@
+# Quick sort in Python
+
+# function to find the partition position
+def partition(array, low, high):
+
+ # choose the rightmost element as pivot
+ pivot = array[high]
+
+ # pointer for greater element
+ i = low - 1
+
+ # traverse through all elements
+ # compare each element with pivot
+ for j in range(low, high):
+ if array[j] <= pivot:
+ # if element smaller than pivot is found
+ # swap it with the greater element pointed by i
+ i = i + 1
+
+ # swapping element at i with element at j
+ (array[i], array[j]) = (array[j], array[i])
+
+ # swap the pivot element with the greater element specified by i
+ (array[i + 1], array[high]) = (array[high], array[i + 1])
+
+ # return the position from where partition is done
+ return i + 1
+
+# function to perform quicksort
+def quickSort(array, low, high):
+ if low < high:
+
+ # find pivot element such that
+ # element smaller than pivot are on the left
+ # element greater than pivot are on the right
+ pi = partition(array, low, high)
+
+ # recursive call on the left of pivot
+ quickSort(array, low, pi - 1)
+
+ # recursive call on the right of pivot
+ quickSort(array, pi + 1, high)
+
+
+data = [8, 7, 2, 1, 0, 9, 6]
+print("Unsorted Array")
+print(data)
+
+size = len(data)
+
+quickSort(data, 0, size - 1)
+
+print('Sorted Array in Ascending Order:')
+print(data)
\ No newline at end of file
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