diff --git a/.github/workflows/run_test.yml b/.github/workflows/run_test.yml
new file mode 100644
index 00000000..e5b2ab35
--- /dev/null
+++ b/.github/workflows/run_test.yml
@@ -0,0 +1,32 @@
+name: simple_calculator unit test
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.10"]
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip  
+          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+      - name: Lint with Ruff
+        run: |
+          pip install ruff  
+          ruff --format=github --target-version=py310 .
+        continue-on-error: true
+      - name: Test with pytest
+        run: |
+          coverage run -m pytest tests/tests_1b.py -v -s
+      - name: Generate Coverage Report
+        run: |
+          coverage report -m
diff --git a/labs/lab_1/bwsi-intro-python.code-workspace b/labs/lab_1/bwsi-intro-python.code-workspace
new file mode 100644
index 00000000..ade0b89a
--- /dev/null
+++ b/labs/lab_1/bwsi-intro-python.code-workspace
@@ -0,0 +1,11 @@
+{
+	"folders": [
+		{
+			"path": "../../../bwsi-intro-python"
+		},
+		{
+			"path": "../.."
+		}
+	],
+	"settings": {}
+}
\ No newline at end of file
diff --git a/labs/lab_1/lab_1a.py b/labs/lab_1/lab_1a.py
index 9d15ec83..1df9055d 100644
--- a/labs/lab_1/lab_1a.py
+++ b/labs/lab_1/lab_1a.py
@@ -1,6 +1,6 @@
 """
 lab_1a.py
-
+aaabbb
 The first lab in the BWSI CSS course. To complete this lab, fill out the variable on line 10
 with your name. Then, save the code, add it to the staging area, and commit it to the Git tree.
 """
@@ -8,7 +8,7 @@
 def main():
     print("Hello World!")
 
-    name = "" # TODO: Insert your name between the double quotes
+    name = "Max Wang" # TODO: Insert your name between the double quotes
 
     print(f"{name}, Welcome to the CSS course!")
 
diff --git a/labs/lab_1/lab_1b.py b/labs/lab_1/lab_1b.py
index e58dd957..4f5cd909 100644
--- a/labs/lab_1/lab_1b.py
+++ b/labs/lab_1/lab_1b.py
@@ -37,18 +37,34 @@ def simple_calculator(operation: str, num1: float, num2: float) -> float:
     else:
         raise ValueError("Invalid operation. Please choose from 'add', 'subtract', 'multiply', or 'divide'.")
 
+def request_sanitized_number(prompt: str) -> float:
+    while True:
+        try:
+            number = float(input(prompt))
+            return number
+        except ValueError:
+            print("Invalid input. Please enter a valid number.")
+            
 def main():
     
     print(f"===== Simple Calculator =====")
 
     # Ask the user for sample input    
-    num1 = float(input("Enter the first number: "))
-    num2 = float(input("Enter the second number: "))
+    num1 = request_sanitized_number("Enter the first number: ")
+    num2 = request_sanitized_number("Enter the second number: ")
     operation = input("Enter the operation (add, subtract, multiply, divide): ").strip().lower()
 
     # Perform the calculation and display the result
-    result = simple_calculator(operation, num1, num2)
-    print(f"The result of {operation}ing {num1} and {num2} is: {result}")
+    while True:
+        try:
+            operation = input("Enter the operation (add, subtract, multiply, divide): ").strip().lower()
+            result = simple_calculator(operation, num1, num2)
+            print(f"The result of {operation}ing {num1} and {num2} is: {result}")
+            break  # Exit only after success
+
+        except ValueError as e:
+            print(f"Error: {e}")
+            print("Please enter a valid operation.\n")
 
 
 if __name__ == "__main__":