TypeError: finance_tracker.create_widgets..() missing 1 required positional argument: 'col'

I am getting an error in the following code

class finance_tracker:def init(self, root):self.root = rootself.root.geometry("1000x550")self.root.resizable(False, False)self.root.title('Personal Finance Tracker')self.root.iconbitmap(r'C:\Users\USER\Desktop\SD1_Courseworks\COURSEWORK_03\tracker_icon.ico')self.FILE_PATH = 'transaction.json'self.transactions = self.load_transaction()self.create_widgets()self.max_id = max(transaction['id'] for category in self.transactions.values() for transaction incategory) if self.transactions else 0self.search_transactions()

def create_widgets(self):    # create label    display_title = tk.Label(self.root, text="Manage Your Transactions Here!",                             anchor="center", font=TITLE_FONT_STYLE, bg=BLUE_GRAY)    display_title.pack()    # Add Some style    style = ttk.Style()    # pick a theme    style.theme_use('clam')  # themes - defaults, alt, clam, vista    # configure our treeview colors    style.configure('Treeview',                    background='White',                    foreground='Black',                    rowheight=25,                    fieldbackground=ASH_GRAY)    # change selected color    style.map('Treeview',              background=[('selected', BUTTERSCOTCH_ORANGE)])    # create treeview frame    tree_frame = tk.Frame(self.root)    tree_frame.configure(bg=BLUE_GRAY)    tree_frame.pack(fill=tk.BOTH, expand=True, pady=10)    # create treeview scroll bar    tree_scroll = tk.Scrollbar(tree_frame)    tree_scroll.configure(bg=BLUE_GRAY, relief=tk.FLAT)    tree_scroll.pack(side=tk.RIGHT, fill=tk.Y)    # create the tree view    self.my_tree = ttk.Treeview(tree_frame, yscrollcommand=tree_scroll.set, selectmode=tk.EXTENDED)    self.my_tree.pack(fill=tk.BOTH, padx=10)    # defining columns    self.my_tree['columns'] = ('Transaction Type', 'Transaction Category', 'Transaction Amount', 'Transaction Date', 'Transaction ID')    # configure scroll bars    tree_scroll.configure(command=self.my_tree.yview)    # format columns    self.my_tree.column('#0', width=0, stretch=NO)    for col in self.my_tree['columns']:        self.my_tree.column(col, anchor=tk.CENTER, width=120)    # create headings    self.my_tree.heading('#0', text='', anchor=tk.W)    for col in self.my_tree['columns']:        self.my_tree.heading(col, text=col, anchor=tk.CENTER,                             command=lambda col: self.sort_by_column(self.my_tree, col, False))    # create transaction type based striped row tags    self.my_tree.tag_configure('income_row', background=ROBIN_EGG_BLUE)    self.my_tree.tag_configure('expense_row', background=VERDIGRIS_BLUE)    # adding data to the screen    self.count = 0    for item in self.transactions.keys():        for record in self.transactions.get(item):            if record['type'] == 'Income':                self.my_tree.insert(parent='', index='end', iid=self.count, text='',                                    values=(                                    record['type'], item, f'{record['amount']:,.2f}', record['date'], record['id']),                                    tags=('income_row',))            elif record['type'] == 'Expense':                self.my_tree.insert(parent='', index='end', iid=self.count, text='',                                    values=(                                    record['type'], item, f'{record['amount']:,.2f}', record['date'], record['id']),                                    tags=('expense_row',))            self.count += 1  # increment counterdef sort_by_column(self, tree, col, reverse):    for row in tree.get_children():        data = (tree.set(row, col), row)        data.sort(reverse=reverse)        for index in range(len(data)):            val, row = data[index]            tree.move(row, '', index)        tree.heading(col, command=lambda c=col: self.sort_by_column(tree, c, not reverse))

I tried changing the code by changing c=col. But it did not worked