使用 Loguru 登錄時如何限制小數位數？

Question

我想知道如何在使用loguru時指定一些日志記錄 output 中的小數點數，請考慮以下不起作用：

from loguru import logger
l1 = [0.123456]
# example from documentation
logger.info("If you're using Python {}, prefer {feature} of course!", 3.6, feature="f-strings")
# my try
logger.info("Eval {0:.3f}".format(l1))

Answer 1

問題是l1是列表，您將其視為標量值

使用索引，它會工作

from loguru import logger

l1 = [0.123456]
# example from documentation
logger.info("If you're using Python {}, prefer {feature} of course!", 3.6, feature="f-strings")

logger.info("Eval {0:.3f}".format(l1[0]))

Output：

2021-02-12 06:02:23.680 | INFO     | __main__:<module>:5 - If you're using Python 3.6, prefer f-strings of course!
2021-02-12 06:02:23.682 | INFO     | __main__:<module>:7 - Eval 0.123