input: Write a function to generate an HTML page containing a table with the given employee data. The function should take a list of dictionaries as input, where each dictionary represents an employee with keys 'Name', 'Job Title', 'Department', and 'Salary'. The output should be a string containing the HTML code for the table.
  
  assert generate_employee_table([{'Name': 'John Doe', 'Job Title': 'Senior Developer', 'Department': 'IT', 'Salary': '$120,000'}, {'Name': 'Jane Doe', 'Job Title': 'Manager', 'Department': 'Finance', 'Salary': '$95,000'}, {'Name': 'Tim Smith', 'Job Title': 'Junior Developer', 'Department': 'IT', 'Salary': '$55,000'}])=='''<html>
    <head>
      <title>Employee Data</title>
    </head>
    <body>
      <table>
        <thead>
          <tr>
            <th>Name</th>
            <th>Job Title</th>
            <th>Department</th>
            <th>Salary</th>
          </tr>
        </thead>
        <tbody>
          <tr>
            <td>John Doe</td>
            <td>Senior Developer</td>
            <td>IT</td>
            <td>$120,000</td>
          </tr>
          <tr>
            <td>Jane Doe</td>
            <td>Manager</td>
            <td>Finance</td>
            <td>$95,000</td>
          </tr>
          <tr>
            <td>Tim Smith</td>
            <td>Junior Developer</td>
            <td>IT</td>
            <td>$55,000</td>
          </tr>
        </tbody>
      </table>
    </body>
  </html>'''
output: def generate_employee_table(employees):
      html = '''<html>
    <head>
      <title>Employee Data</title>
    </head>
    <body>
      <table>
        <thead>
          <tr>
            <th>Name</th>
            <th>Job Title</th>
            <th>Department</th>
            <th>Salary</th>
          </tr>
        </thead>
        <tbody>'''
      
      for employee in employees:
          html += f'''
          <tr>
            <td>{employee['Name']}</td>
            <td>{employee['Job Title']}</td>
            <td>{employee['Department']}</td>
            <td>{employee['Salary']}</td>
          </tr>'''
      
      html += '''
        </tbody>
      </table>
    </body>
  </html>'''
      
      return html