[英]"TypeError: <lambda>() takes 1 positional argument but 2 were given" using reduce()
[英]Python tqdm TypeError: <lambda>() takes 1 positional argument but 2 were given
我试图创建一个进度条,以使用以下代码查看文件传输的进度。
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)))
我得到这个错误:
TypeError: <lambda>() takes 1 positional argument but 2 were given
从文档 :
- callback ( callable )–可选的回调函数(形式:
func(int, int)
),它接受到目前为止已传输的字节以及要传输的总字节
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