更改日志记录“打印"功能来"tqdm.write"；因此记录不会干扰进度条 [英] Change logging "print" function to "tqdm.write" so logging doesn't interfere with progress bars

问题描述

我有一个简单的问题:如何将内置的Python记录器的print函数更改为tqdm.write，以使记录消息不会干扰tqdm的进度条?谢谢！

I have a simple question: How do I change the built-in Python logger's print function to tqdm.write such that logging messages do not interfere with tqdm's progress bars? Thanks!

推荐答案

您需要自定义日志记录处理程序:

You need a custom logging handler:

import logging
import tqdm

class TqdmLoggingHandler(logging.Handler):
    def __init__(self, level=logging.NOTSET):
        super().__init__(level)

    def emit(self, record):
        try:
            msg = self.format(record)
            tqdm.tqdm.write(msg)
            self.flush()
        except (KeyboardInterrupt, SystemExit):
            raise
        except:
            self.handleError(record)  

，然后将其添加到日志链:

and then add this to the logging chain:

import time

log = logging.getLogger (__name__)
log.setLevel (logging.INFO)
log.addHandler (TqdmLoggingHandler ())
for i in tqdm.tqdm (range (100)):
    if i == 50:
        log.info ("Half-way there!")
    time.sleep (0.1)

修复了对超级TqdmLoggingHandler的init方法的调用中的一个错误，该错误已由勤奋的读者@BlaineRogers在评论中指出. (如果有人想进一步了解Python的这个阴暗区域，我建议 https://fuhm.net/super-有害/)

Fixed a bug in the call to super TqdmLoggingHandler's init method, that was pointed out by diligent reader @BlaineRogers in the comments. (If anyone wants to read further about this murky area of Python, I recommend https://fuhm.net/super-harmful/)

这篇关于更改日志记录“打印"功能来"tqdm.write"；因此记录不会干扰进度条的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！