Please analyse this python script for me and tell me what it does: def get_tags(tag_source):
    # Simulate fetching tags based on the tag source
    sample_tags = {
        "source1": ["tag1", "tag2", "tag3"],
        "source2": ["tag4", "tag5"],
    }
    return sample_tags.get(tag_source.strip(), [])

def get_complementary_artists():
    print("Enter complementary artists (separated by commas):")
    artists = input().split(",")
    return [artist.strip() for artist in artists if artist.strip()]

def get_negative_prompt():
    print("Enter negative prompt (separated by commas):")
    negative_prompt = input().split(",")
    return [prompt.strip() for prompt in negative_prompt if prompt.strip()]

def get_character_descriptors():
    print("Enter character descriptors (separated by commas):")
    descriptors = input().split(",")
    return [descriptor.strip() for descriptor in descriptors if descriptor.strip()]

def get_physical_details():
    print("Enter physical details (separated by commas):")
    details = input().split(",")
    return [detail.strip() for detail in details if detail.strip()]

def get_clothing():
    print("Enter clothing (separated by commas):")
    clothing = input().split(",")
    return [item.strip() for item in clothing if item.strip()]

def get_pose_action_composition():
    print("Enter pose/action/composition (separated by commas):")
    composition = input().split(",")
    return [item.strip() for item in composition if item.strip()]

def get_environment_setting():
    print("Enter environment setting (separated by commas):")
    setting = input().split(",")
    return [item.strip() for item in setting if item.strip()]

def get_quality_tags():
    print("Enter quality tags (separated by commas):")
    tags = input().split(",")
    return [tag.strip() for tag in tags if tag.strip()]

def generate_prompt():
    # Prompt format
    print("Enter prompt format (≤350 characters):")
    format_input = input().strip()

    # Validate format input
    if len(format_input) > 350:
        print("Error: Input exceeds character limit.")
        return

    # Prompt for tag sources
    print("\nEnter tag sources (separated by commas):")
    tag_sources = input().split(",")

    # Get tags from simulated sources
    tags = []
    for tag_source in tag_sources:
        tags.extend(get_tags(tag_source))

    # Get user input for other parameters
    descriptors = get_character_descriptors()
    details = get_physical_details()
    clothing = get_clothing()
    composition = get_pose_action_composition()
    setting = get_environment_setting()
    quality_tags = get_quality_tags()
    artists = get_complementary_artists()
    negative_prompt = get_negative_prompt()

    # Construct prompt
    prompt = format_input + " " + " ".join(tags + descriptors + details + clothing + composition + setting + quality_tags)

    # Add complementary artists
    if artists:
        prompt += " art by " + ", ".join(artists)

    # Add negative prompt
    if negative_prompt:
        prompt += " $" + ", ".join(negative_prompt)

    return prompt.strip()

# Main function
if __name__ == "__main__":
    prompt = generate_prompt()
    print("\nGenerated Prompt:")
    print(prompt)