Python tqdm TypeError： <lambda> （）接受1个位置参数，但给出了2个

Question

I tried to create a progress bar to view progress of file transferring by using the below code.

from tqdm import tqdm
import pysftp
cnopts = pysftp.CnOpts()
cnopts.hostkeys = None
srv = pysftp.Connection(host=host,username=username,password=password,cnopts=cnopts)
with tqdm(unit = 'blocks', unit_scale = True, leave = False, miniters = 1, desc = 'Uploading......', total = filesize) as tqdm_instance:
    srv.put("D:\\wp-deploy.jpg","/var/www/html/wp-deploy.jpg",callback=lambda sent:tqdm_instance.update(len(sent)))

and I got this error:

TypeError: <lambda>() takes 1 positional argument but 2 were given

Answer 1

From the docs :

• callback ( callable ) – optional callback function (form: func(int, int) ) that accepts the bytes transferred so far and the total bytes to be transferred