Can you help me this tradingview pine script code convert to Python code. CVD is one of the things that helps me to create an algo trading system. Please help to complete my project.

//@version=5



indicator("Cumulative Volume Delta", "CVD", format=format.volume)







anchorInput = input.timeframe("1D", "Anchor period")



lowerTimeframeTooltip = "The indicator scans lower timeframe data to approximate up and down volume used in the delta calculation. By default, the timeframe is chosen automatically. These inputs override this with a custom timeframe.



 nnHigher timeframes provide more historical data, but the data will be less precise."



useCustomTimeframeInput = input.bool(false, "Use custom timeframe", tooltip = lowerTimeframeTooltip)



lowerTimeframeInput = input.timeframe("1", "Timeframe")







upAndDownVolume() =>



    posVol = 0.0



    negVol = 0.0



    



    var isBuyVolume = true    







    switch



        close > open     => isBuyVolume := true



        close < open     => isBuyVolume := false



        close > close[1] => isBuyVolume := true



        close < close[1] => isBuyVolume := false







    if isBuyVolume



        posVol += volume



    else



        negVol -= volume







    posVol + negVol







var lowerTimeframe = switch



    useCustomTimeframeInput => lowerTimeframeInput



    timeframe.isseconds     => "1S"



    timeframe.isintraday    => "1"



    timeframe.isdaily       => "5"



    => "60"







diffVolArray = request.security_lower_tf(syminfo.tickerid, lowerTimeframe, upAndDownVolume())







getHighLow(arr) =>



    float cumVolume = na



    float maxVolume = na



    float minVolume = na







    for item in arr



        cumVolume := nz(cumVolume) + item



        maxVolume := math.max(nz(maxVolume), cumVolume)



        minVolume := math.min(nz(minVolume), cumVolume)







    [maxVolume, minVolume, cumVolume]







[maxVolume, minVolume, lastVolume] = getHighLow(diffVolArray)







var cumulLastVolume = 0.0



anchorChange = timeframe.change(anchorInput) or barstate.isfirst



cumulOpenVolume = anchorChange and not na(lastVolume) ? 0.0 : cumulLastVolume[1]



cumulMaxVolume = cumulOpenVolume + maxVolume



cumulMinVolume = cumulOpenVolume + minVolume



cumulLastVolume := cumulOpenVolume + lastVolume







col = cumulLastVolume >= cumulOpenVolume ? color.teal : color.red



hline(0)



plotcandle(cumulOpenVolume, cumulMaxVolume, cumulMinVolume, cumulLastVolume, "CVD", color = col, bordercolor = col, wickcolor = col)







var cumVol = 0.



cumVol += nz(volume)



if barstate.islast and cumVol == 0



    runtime.error("The data vendor doesn't provide volume data for this symbol.")

As I am new to Pine Script, some things are not clear to me, so I hope you can help me to convert this code to python.