input:     from typing import List
  
  
  def sentiment_analysis(tweets: List[str]) -> List[str]:
      """ Analyze the sentiment of a list of tweets, classifying them as 'Positive' or 'Negative'.
      >>> sentiment_analysis(["I love this product!", "This is the worst experience ever."])
      ['Positive', 'Negative']
      >>> sentiment_analysis(["Great day at the beach", "Not happy with the service"])
      ['Positive', 'Negative']
      """
output:     sentiment_labels = []
      for tweet in tweets:
          if "love" in tweet or "great" in tweet or "happy" in tweet:
              sentiment_labels.append("Positive")
          else:
              sentiment_labels.append("Negative")
      return sentiment_labels