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26-remove-duplicates-from-sorted-array/26-remove-duplicates-from-sorted-array.py

@@ -0,0 +1,19 @@
+class Solution(object):
+    def removeDuplicates(self, nums):
+        """
+        :type nums: List[int]
+        :rtype: int
+        """
+        oldIndex = 1
+        newIndex = 1
+        lastNum = nums[0]
+        
+        while oldIndex < len(nums):
+            if nums[oldIndex] == lastNum:
+                oldIndex += 1
+            else:
+                nums[newIndex] = nums[oldIndex]
+                newIndex += 1
+                lastNum = nums[oldIndex]
+        
+        return len(nums[:newIndex])