mplfinance default values rise error in plot function

Bắt đầu trong plotting.py tại các trình xác thực cấu hình addplot và alines được nêu trong báo cáo, sau đó theo dõi cách các tùy chọn đó được truyền vào mpf.plot(). Tái hiện lời gọi với cả hai tùy chọn đều trống và so sánh với một biểu đồ nến thông thường. Được xem là hoàn tất khi cấu hình addplot và alines trống được chấp nhận mà không có lỗi từ trình xác thực và biểu đồ vẫn được render.

Hi!
First of all, thank you for such useful library for plotting candles!

I'm trying to process a scenario, when addplot and alines is empty (at the present moment buys and sells lists have only one point in format ['date','price'], but it doesn't matter for question). So my function, that builds a graph is:

def mplfplotcoin(df,title,
                 buys=[],
                 sells=[],
                 rsi=False):
    
    adp = []

    # adding trades
    if buys: 
        buysdf = pd.DataFrame([buys],columns=['Date', 'OpenPrice']) # when buys list consists of one point
        buysdf = df.merge(buysdf,on='Date',how='left')['OpenPrice'] # left join
        addbuys = mpf.make_addplot(buysdf,scatter=True,markersize=300,marker=6,color='forestgreen',alpha=0.75) # buy markers
        adp.append(addbuys)
    if sells:
        sellsdf = pd.DataFrame([sells], columns=['Date', 'ClosePrice']) # when sells list consists of one point
        sellsdf = df.merge(sellsdf,on='Date',how='left')['ClosePrice'] # left join
        addsells = mpf.make_addplot(sellsdf,scatter=True,markersize=300,marker=7,color='firebrick',alpha=0.75) # sell markers
        adp.append(addsells)
    
    # adding line between trades https://github.com/matplotlib/mplfinance/blob/master/examples/using_lines.ipynb
    if len(buys) == len(sells) and buys: # I know it's awful))) I'll change it later
        tradeline = dict(alines=[tuple(buys),tuple(sells)],colors='lightslategray',linestyle='--',linewidths=2,alpha=0.5)
    else: tradeline = None

    # adding rsi
    if rsi:
        addrsi = mpf.make_addplot((df['rsi']),panel=1,type='line',color='orange',width=1,ylabel='rsi',ylim=(-5,105))
        adp.append(addrsi)

    # checking adp list
    if not adp: adp = None

    # drawing
    mpf.plot(df,
             type='candle',
             style='tradingview',
             volume=True,
             show_nontrading=True,
             addplot=adp,
             alines=tradeline,
             figscale=1.3,
             title=title,
             ylabel='USDT')

so, lines else: tradeline = None and if not adp: adp = None are like this, because I found it in your library file plottin.py:

#211 line:
        'addplot'                   : { 'Default'     : None, 
                                        'Description' : 'addplot object or sequence of addplot objects (from `mpf.make_addplot()`)',
                                        'Validator'   : lambda value: isinstance(value,dict) or (isinstance(value,list) and all([isinstance(d,dict) for d in value])) },

# 267 line:
        'alines'                    : { 'Default'     : None, 
                                        'Description' : 'Draw one or more ARBITRARY LINES anywhere on the plot, by'+
                                                        ' specifying a sequence of two or more date/price pairs, or by'+
                                                        ' specifying a sequence of sequences of two or more date/price pairs.'+
                                                        ' May also be a dict with key `alines` (as date/price pairs described above),'+
                                                        ' plus one or more of the following keys:'+
                                                        ' `colors`, `linestyle`, `linewidths`, `alpha`.',

however I get errors for mpf.plot(..., addplot=adp, alines=tradeline, ...):

TypeError: kwarg "addplot" validator returned False for value: "None"
    'Validator'   : lambda value: isinstance(value,dict) or (isinstance(value,list) and all([isinstance(d,dict) for d in value])) },

and the same for alines parameter:

TypeError: kwarg "alines" validator returned False for value: "None"
    'Validator'   : lambda value: _alines_validator(value) },

If I go to plotting.py, I can't understand why error is rised, because there is only one if about addplot is None:

# 739 line
    addplot = config['addplot']
    if addplot is not None and ptype not in VALID_PMOVE_TYPES:
        ...

# and then 816 line is new condition:
    # fill_between is NOT supported for external_axes_mode
    # (caller can easily call ax.fill_between() themselves).
    if config['fill_between'] is not None and not external_axes_mode:
        ...

Ok, I tried to define ptype in my code:

# checking adp list
if not adp: adp = [mpf.make_addplot(None,type='line')]

But again error:

    raise TypeError('Wrong type for data, in make_addplot()')
TypeError: Wrong type for data, in make_addplot()

Please, help me to understand how to draw plot if addplot and alines (and other kwards) are empty?