python solutions added

python-solutions/MakeTheStringGreat.py

@@ -0,0 +1,15 @@
+def makeGood(s):
+    stack=[]
+    for char in s:
+        if stack:
+            if (char.isupper() and stack[-1].islower() and stack[-1].upper() == char )or (char.islower() and stack[-1].isupper() and stack[-1].lower() == char):
+                stack.pop()
+                continue
+            else:
+                stack.append(char)
+
+        else:
+            stack.append(char)
+
+
+    return "".join(stack)

python-solutions/PlusOne.py

@@ -0,0 +1,3 @@
+def plusOne(digits):
+    number = int(''.join(map(str, digits)))
+    return [int(digit) for digit in str(number+1)]

python-solutions/RemoveAllAdjacentDuplicatesInString.py

@@ -0,0 +1,9 @@
+def removeDuplicates(s):
+    stack=[]
+    for char in s:
+        if stack and stack[-1] == char:
+            stack.pop()
+        else:
+            stack.append(char)
+
+    return "".join(stack)

python-solutions/RemoveDuplicatesfromSortedArray.py

@@ -0,0 +1,7 @@
+def removeDuplicates(nums):
+    k = 1
+    for i in range(1, len(nums)):
+        if nums[i] != nums[i - 1]:
+            nums[k] = nums[i]
+            k += 1
+    return k

python-solutions/RemoveElement.py

@@ -0,0 +1,8 @@
+def removeElement(nums,val):
+
+    if nums==[]:
+        return 0
+
+    while nums.count(val)!=0:
+        nums.remove(val)
+    return len(nums)

python-solutions/TwoSum.py

@@ -0,0 +1,6 @@
+def twoSum(nums,target):
+    for i in range(len(nums)):
+        complement = target - nums[i]
+        if complement in nums and nums.index(complement) != i:
+            complement_index = nums.index(complement)
+            return [i,complement_index]

python-solutions/ValidParentheses.py

@@ -0,0 +1,7 @@
+def isValid(s):
+    while len(s) > 0:
+        l = len(s)
+        s = s.replace('()','').replace('{}','').replace('[]','')
+        if l==len(s): 
+            return False
+    return True