Library System

library = []

def find_book(title):
    for b in library:
        if b["title"].lower() == title.lower():
            return b
    return None

print("=== Library System ===")
while True:
    print("\n1. Book add karo")
    print("2. Book issue karo")
    print("3. Book return karo")
    print("4. Book dhundho")
    print("5. Sab books dekho")
    print("6. Baahar jao")
    ch = input("Choice: ")
    if ch == "1":
        title  = input("Title: ")
        author = input("Author: ")
        library.append({
            "title": title, "author": author,
            "issued": False, "issued_to": ""
        })
        print(f"Book add ho gayi: {title}")
    elif ch == "2":
        title = input("Book title: ")
        book  = find_book(title)
        if book:
            if book["issued"]:
                print(f"Book already issued hai: {book['issued_to']} ko")
            else:
                book["issued_to"] = input("Kisko issue karein: ")
                book["issued"] = True
                print(f"Book issue ho gayi: {book['issued_to']} ko")
        else:
            print("Book nahi mili!")
    elif ch == "3":
        title = input("Book title: ")
        book  = find_book(title)
        if book and book["issued"]:
            book["issued"] = False
            book["issued_to"] = ""
            print("Book return ho gayi!")
        else:
            print("Book nahi mili ya issued nahi hai!")
    elif ch == "4":
        q = input("Search karo: ").lower()
        found = [b for b in library if q in b["title"].lower() or q in b["author"].lower()]
        for b in found:
            status = f"Issued: {b['issued_to']}" if b["issued"] else "Available"
            print(f"  {b['title']} - {b['author']} [{status}]")
    elif ch == "5":
        print(f"\n{'Title':20} {'Author':15} {'Status'}")
        print("-" * 50)
        for b in library:
            status = f"Issued: {b['issued_to']}" if b["issued"] else "Available"
            print(f"  {b['title']:18} {b['author']:13} {status}")
    elif ch == "6":
        break