Traceback (most recent call last):


 "<input>", line 22, in <module>


 "<input>", line 15, in percentrank


 "C:\Users\dd\PycharmProjects\rolling\venv\lib\site-packages\pandas\core\generic.py", line 10769, in rolling

closed=closed,


 "C:\Users\dd\PycharmProjects\rolling\venv\lib\site-packages\pandas\core\window.py", line 2849, in rolling

return Rolling(obj, **kwds)


 "C:\Users\dd\PycharmProjects\rolling\venv\lib\site-packages\pandas\core\window.py", line 93, in __init__

self.validate()


 "C:\Users\dd\PycharmProjects\rolling\venv\lib\site-packages\pandas\core\window.py", line 1738, in validate

raise ValueError("window must be an integer")
ValueError: window must be an integer

Traceback (most recent call last):


 "site.py", line 101, in main


 "site.py", line 78, in run_entry_point


 "site-packages\calibre\utils\ipc\worker.py", line 195, in main


 "site-packages\calibre\gui2\convert\gui_conversion.py", line 33, in gui_convert_override


 "site-packages\calibre\gui2\convert\gui_conversion.py", line 26, in gui_convert


 "site-packages\calibre\ebooks\conversion\plumber.py", line 1074, in run


 "site-packages\calibre\ebooks\azw4\reader.py", line 24, in unwrap
ValueError: No embedded PDF found in AZW4 file
