[Python] How to rewrite my Pinescript code to Python

I am trying to rewrite this code to Python:

src = input.source(close, "Source")
volStop(src) =>
var max = src
var min = src
max := math.max(max, src)
min := math.min(min, src)
[max, min]

[max, min] = volStop(src)
plot(max, "Max", style=plot.style_cross)


Precisely I have a problem with these lines:

max := math.max(max, src)
min := math.min(min, src)


In Python I have a function, leta call it func1, and I want to get the same result the Pinescript is returning.

I have only tried for loop since from what I understand calling a function in Pinescript works kind of like for loop. And I tried to replicate the calculation but I couldn't achieve the expected results.

This is the line that is being plotted on Tradingview:



And this is the line that is being plotted in Python: the area that is framed with red square is the approximate area that is visible on Tradingview screenshot.



My current code:

maxmin = pd.DataFrame()
maxmin["max"] = price_df[f"{name_var}"]
maxmin["min"] = price_df[f"{name_var}"]
for i in range(price_df.shape[0]):
maxmin["max"].iloc = max(maxmin["max"].shift(1).fillna(0).iloc, price_df[f"{name_var}"].iloc)
maxmin["min"].iloc = min(maxmin["min"].shift(1).fillna(0).iloc, price_df[f"{name_var}"].iloc)


The name_var variable is set to 'Close' column.

How can I rewrite the Pinescript code to Python to get the same results?

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