我有一个简单的问题:如何将内置Python记录器的print
函数更改为tqdm.write
,以便日志消息不会干扰tqdm的进度条?谢谢!
答案 0 :(得分:17)
您需要一个自定义日志记录处理程序:
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:
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)
编辑:修复了对超级TqdmLoggingHandler的init方法的调用中的错误,这是由努力的读者@BlaineRogers在评论中指出的。 (如果有人想进一步阅读有关Python这个阴暗区域的内容,我建议https://fuhm.net/super-harmful/)
答案 1 :(得分:2)
最简单的方法是更改 StreamHandler
对象的流,例如:
import logging
from tqdm import tqdm, trange
import time
log = logging.getLogger(__name__)
log.setLevel(logging.INFO)
handler = logging.StreamHandler()
handler.setStream(tqdm) # <-- important
handler = log.addHandler(handler)
for i in trange(100):
if i == 50:
log.info("Half-way there!")
time.sleep(0.1)
答案 2 :(得分:1)
一个不那么优雅的简单解决方案是将tqdm对象转换为字符串。之后,您可以记录该消息(或根据需要进行处理)。 “ format_dict”属性也可能有用:
Option::<T>::None
输出:
from tqdm import tqdm
import time
#loop with progressbar:
it=tqdm(total=10)
for i in range(10):
time.sleep(0.1)
it.update(1)
it.close()
print("\n","--"*10)
# Convert tdqm object last output to sting
str_bar_msg = str(it)
print(str_bar_msg)
# See attributes:
print(it.format_dict)
最诚挚的问候
答案 3 :(得分:1)
基于上面 RolKau 的回答,简化了:
import logging
from tqdm import tqdm
class TqdmLoggingHandler(logging.StreamHandler):
"""Avoid tqdm progress bar interruption by logger's output to console"""
# see logging.StreamHandler.eval method:
# https://github.com/python/cpython/blob/d2e2534751fd675c4d5d3adc208bf4fc984da7bf/Lib/logging/__init__.py#L1082-L1091
# and tqdm.write method:
# https://github.com/tqdm/tqdm/blob/f86104a1f30c38e6f80bfd8fb16d5fcde1e7749f/tqdm/std.py#L614-L620
def emit(self, record):
try:
msg = self.format(record)
tqdm.write(msg, end=self.terminator)
except RecursionError:
raise
except Exception:
self.handleError(record)
测试:
import time
log = logging.getLogger(__name__)
log.setLevel(logging.INFO)
log.addHandler(TqdmLoggingHandler())
# ^-- Assumes this will be the unique handler emitting messages to sys.stdout.
# If other handlers output to sys.stdout (without tqdm.write),
# progress bar will be interrupted by those outputs
for i in tqdm(range(20)):
log.info(f"Looping {i}")
time.sleep(0.1)
警告:如果您在 Jupyter 笔记本上工作,进度条将被中断,AFAIK 无法避免。
答案 4 :(得分:0)
假设您的大多数日志都以logging.info
打印,请将Logger Level设置为WARN
/ ERROR
(在PyCharm终端中进行了测试)。
这将禁止打印logging.info()
。
我用来获取主要日志记录语句和tqdm
打印件的一种技术是更改Logger's level
(注意:在PyCharm的终端中经过测试)。
我将代码中的大多数日志设置为logging.info()
和logging.debug()
。因此,当我在logging level
文件中将__main__
设置为:
import logging
logging.getLogger().setLevel(logging.ERROR)
我的日志如下:
Plotting chunk 8 (reweighted=False)
100%|██████████| 150/150 [09:33<00:00, 3.83s/it]
否则,如果我有:
import logging
logging.getLogger().setLevel(logging.INFO)
我的日志看起来像,tqdm
甚至没有显示:
Plotting chunk 8 (reweighted=False)
INFO:root:Paired 231/231 trigger results.
INFO:root:Paired 3032/3244 trigger results.
...
INFO:root:>>>>>>>>>> STAT GIF <<<<<<<<<<
0%| | 0/150 [00:00<?, ?it/s]INFO:root:Before adding missing triggers, #trig=3032
INFO:root:After adding missing triggers, #trig=4423032
INFO:bcr_pipeline.utils:_add_missing_background_data: 0:00:00.473584
INFO:root:Background datapoints 4423032
INFO:root:Injection datapoints 231
INFO:root:Foreground datapoints 2
INFO:bcr_pipeline.utils:get_plotting_data: 0:00:00.627285
INFO:root:FAP obtained 0.07 at x=6.8337292336858795
1%| | 1/150 [00:03<09:40, 3.90s/it]INFO:root:Before adding missing triggers, #trig=3032
INFO:root:After adding missing triggers, #trig=4423032
INFO:bcr_pipeline.utils:_add_missing_background_data: 0:00:00.567175
INFO:root:Background datapoints 4423032
INFO:root:Injection datapoints 231
INFO:root:Foreground datapoints 2
INFO:bcr_pipeline.utils:get_plotting_data: 0:00:00.732627
INFO:root:FAP obtained 0.07 at x=6.932632217545759
1%|▏ | 2/150 [00:08<09:48, 3.98s/it]INFO:root:Before adding missing triggers, #trig=3032
...