我的脚本有问题，我正在尝试为此函数的每次调用创建日志文件：
@begin.subcommand
def sample_mode(sample, folder = None, reference = None, dbsnp = None):
""" creates a config file for 1 sample
- setup logging system: {folder}/logs/{sample}_init.log
- takes in a sample name
- creates a file: {folder}/{sample}_config.yaml
"""
# get the current folder if none is given
if folder == None:
folder = os.getcwd()
# create logs folder if necessary
if not os.path.isdir("{}/logs".format(folder)):
os.mkdir("{}/logs".format(folder))
log_file = setup_log(sample, folder)
for i in range(1,3):
try:
os.path.getsize("{}/{}.{}.fq.gz".format(folder, sample, i))
except FileNotFoundError:
log_file.error("{}/{}.{}.fq.gz doesn't exist".format(folder, sample, i))
return -1
if os.path.getsize("{}/{}.{}.fq.gz".format(folder, sample, i)) == 0:
log_file.error("\"{}/{}.{}.fq.gz\" is empty\n".format(folder, sample, i))
return -1
# set up logging system
# logging.basicConfig(filename = "{}/logs/{}_init.log".format(folder, sample), level=logging.DEBUG, format='%(asctime)s - %(levelname)s - %(message)s')
# create the config file
with open("{}/{}_config.yaml".format(folder, sample), "w") as config:
config.write("sample: \"{}\"\n\n".format(sample))
log_file.info("Sample name: {}".format(sample))
作为参考，setup_log函数：
def setup_log(sample, folder):
logger = logging.getLogger(__name__)
log_format = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
filename = "{}/logs/{}_init.log".format(folder, sample)
log_handler = logging.FileHandler(filename)
log_handler.setLevel(logging.DEBUG)
log_handler.setFormatter(log_format)
logger.addHandler(log_handler)
return logger
日志文件已创建，但为空。但是，如果我输入了错误的样品名称，则会创建日志文件并写入错误消息。
我做错了什么？
您的代码中存在一些错误，这应该可以解决：
import logging
def setup_log(name):
logger = logging.getLogger(name) # > set up a new name for a new logger
logger.setLevel(logging.DEBUG) # here is the missing line
log_format = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
filename = f"./test_{name}.log"
log_handler = logging.FileHandler(filename)
log_handler.setLevel(logging.DEBUG)
log_handler.setFormatter(log_format)
logger.addHandler(log_handler)
return logger
def test_log(name):
logger = setup_log(name)
logger.info("Just logged from %s", name) # > old formatting syntax is advised by the logging cookbook
test_log("log1")
test_log("log2")
test_log("log3")
未写入日志文件，因为必须先设置记录器的级别，然后再设置处理程序的级别。
另外，您必须知道logging.getLogger(name)返回单例。如果您getLogger使用以前使用的相同名称调用该mfunction，这将返回现有的记录器，这可能会导致您在这里遇到一种非常奇怪的情况。为了说明这一点：
def test_log(name):
logger = setup_log(name)
相当于
def test_log(name):
setup_log(name)
logger = logging.getLogger(name)
此处更多内容：https : //docs.python.org/3/howto/logging-cookbook.html
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