Python如何将控制台输出另存为日志文件

import sys
import os
import time
# 控制台输出记录到文件
class Logger(object):
    def __init__(self, file_name="Default.log", stream=sys.stdout):
        self.terminal = stream
        self.log = open(file_name, "a")
    def write(self, message):
        self.terminal.write(message)
        self.log.write(message)
    def flush(self):
        pass
if __name__ == '__main__':
    # 自定义目录存放日志文件
    log_path = './Logs/'
    if not os.path.exists(log_path):
        os.makedirs(log_path)
    # 日志文件名按照程序运行时间设置
    log_file_name = log_path + 'log-' + time.strftime("%Y%m%d-%H%M%S", time.localtime()) + '.log'
    # 记录正常的 print 信息
    sys.stdout = Logger(log_file_name)
    # 记录 traceback 异常信息
    sys.stderr = Logger(log_file_name)
    print(5555)
    print(2/0)

import sys
log_print = open('Defalust.log', 'w')
sys.stdout = log_print
sys.stderr = log_print
if __name__ == '__main__':
    print(555)
    print(2/0)

import logging
import os
import time
import traceback
import sys
# 创建一个 logger
logger = logging.getLogger(__name__)
# logger 的等级
logger.setLevel(level=logging.INFO)
# 创建一个 handler，写入日志文件
log_path = './Logs/'
if not os.path.exists(log_path):
    os.makedirs(log_path)
log_file_name = log_path + 'log-' + time.strftime("%Y%m%d-%H%M%S", time.localtime()) + '.log'
logfile = log_file_name
handler = logging.FileHandler(logfile, mode='a+')
# 输入到日志文件中的日志等级
handler.setLevel(logging.DEBUG)
# 设置 handler 中日志记录格式
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
handler.setFormatter(formatter)
# 将 handler 添加到 logger 里面
logger.addHandler(handler)
# 将日志输出到控制台，默认 sys.stderr
logger.addHandler(logging.StreamHandler(sys.stdout))
logger.info("Start print log")
if __name__ == '__main__':
    try:
        print(5555555555)
        print(5/0)
    except Exception as e:
        logger.error(str(traceback.format_exc()))

class Logger(object):
    def __init__(self, filename='default.log', stream=sys.stdout):
        self.terminal = stream
        self.log = open(filename, 'a')
    def write(self, message):
        self.terminal.write(message)
        self.log.write(message)
        self.terminal.flush()  # 不启动缓冲,实时输出
        self.log.flush()
    def flush(self):
        pass

sys.stdout = Logger('./log.log', sys.stdout)
sys.stderr = Logger('./log.log', sys.stderr)

import tensorflow as tf
import os, sys
os.environ['TF_CPP_MIN_LOG_LEVEL'] = '3'
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
os.environ["CUDA_VISIBLE_DEVICES"] = "2"
class Logger(object):
    def __init__(self, filename='default.log', stream=sys.stdout):
        self.terminal = stream
        self.log = open(filename, 'a')
    def write(self, message):
        self.terminal.write(message)
        self.log.write(message)
        self.terminal.flush()  # 不启动缓冲,实时输出
        self.log.flush()
    def flush(self):
        pass
sys.stdout = Logger('./log.log', sys.stdout)
sys.stderr = Logger('./log.log', sys.stderr)
logit = tf.constant(1)
tf_config = tf.ConfigProto(log_device_placement=True)
sess = tf.Session(config=tf_config)
print(sess.run(logit))

# 控制台重定向
import tensorflow as tf
import os, time
os.environ['TF_CPP_MIN_LOG_LEVEL'] = '3'
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
os.environ["CUDA_VISIBLE_DEVICES"] = "-1"
logit = tf.constant(1)
tf_config = tf.ConfigProto(log_device_placement=True)
sess = tf.Session(config=tf_config)
print(sess.run(logit))