LOG_F和LOG_IF_F的区别
时间: 2023-08-03 20:03:10 浏览: 218
LOG_F和LOG_IF_F都是Google的日志库glog中的宏定义,用于输出日志。它们的区别在于:
1. LOG_F是一个普通的宏定义,可以在任何时候使用,无论条件是否成立,都会输出日志信息;
2. LOG_IF_F是一个带条件的宏定义,只有在条件成立时才会输出日志信息,否则不会输出。
例如,以下代码使用LOG_F宏定义:
```
LOG_F(INFO, "This is a log message.");
```
无论什么条件,都会输出"This is a log message."信息。而以下代码使用LOG_IF_F宏定义:
```
int x = 10;
LOG_IF_F(INFO, x > 5, "The value of x is %d.", x);
```
只有当x的值大于5时,才会输出"The value of x is 10."信息。
因此,LOG_IF_F更加灵活和智能,可以根据条件来控制输出的日志信息,而LOG_F则更加简单直接,无需考虑条件。
相关问题
将这段代码改为C++:import os from logging import getLogger, DEBUG, handlers, Formatter from src.config import temp, basic base_dir = basic.temp_root_dir + "/ahsg/" def log_record(log_name=None, file_name=None, file_size=None, file_bat=None): if not isinstance(log_name, str): log_name = 'logg' if not (isinstance(file_name, str) and file_name.endswith('.log')): file_name = f'{log_name}.log' if not isinstance(file_size, int): file_size = 5000000 if not isinstance(file_bat, int): file_bat = 1 __loggg = getLogger(log_name) if not __loggg.handlers: __loggg.setLevel(DEBUG) file_log = handlers.RotatingFileHandler(file_name, maxBytes=file_size, backupCount=file_bat) file_log.setFormatter(Formatter(f"%(asctime)s-['{log_name}']-%(levelname)s:%(message)s")) __loggg.addHandler(file_log) return __loggg log_report_station_behaviour = log_record('station_behaviour', base_dir + 'station_behaviour.log') log_report_timing_violation_placement = log_record('timing_violation_placement', base_dir + 'timing_violation_placement.log') log_report_region_detection = log_record('region_detection', base_dir + 'region_detection.log')
#include <iostream>
#include <string>
#include <fstream>
#include <ctime>
#include <iomanip>
#include "src/config.h"
using namespace std;
string base_dir = basic.temp_root_dir + "/ahsg/";
logger log_record(string log_name = "", string file_name = "", int file_size = 0, int file_bat = 0) {
if (log_name.empty()) {
log_name = "logg";
}
if (file_name.empty() || file_name.substr(file_name.length() - 4) != ".log") {
file_name = log_name + ".log";
}
if (file_size == 0) {
file_size = 5000000;
}
if (file_bat == 0) {
file_bat = 1;
}
logger __loggg = getLogger(log_name);
if (__loggg.handlers().empty()) {
__loggg.setLevel(DEBUG);
handlers::RotatingFileHandler file_log(file_name, maxBytes=file_size, backupCount=file_bat);
file_log.setFormatter(Formatter("%(asctime)s-['" + log_name + "']-%(levelname)s:%(message)s"));
__loggg.addHandler(file_log);
}
return __loggg;
}
logger log_report_station_behaviour = log_record("station_behaviour", base_dir + "station_behaviour.log");
logger log_report_timing_violation_placement = log_record("timing_violation_placement", base_dir + "timing_violation_placement.log");
logger log_report_region_detection = log_record("region_detection", base_dir + "region_detection.log");
int main() {
// your code here
return 0;
}
帮我优化一下这段python代码 import datetime class error: def __init__(self, log_path): pass self.log_path = log_path self.port = port self.end_time = end_time self.start_time = start_time def network_error(self, log_path: str, port: str, end_time: float, start_time: float = 0): with open(log_path, 'r') as f: for line in f.readlines(): log_time_str = line.split()[0] # 就看第一个是不是时间,如何是是时间戳的话看下要不要转 datetime_object = datetime.datetime.strptime( log_time_str, '%Y-%m-%d %H:%M:%S') log_time = datetime_object.timestamp() if start_time <= log_time <= end_time: if port in line: return True def no_finf_element(self, log_path: str, end_time: float, start_time: float = 0): with open(log_path, 'r') as f: for line in f.readlines(): log_time_str = line.split()[0] # 就看第一个是不是时间,如何是是时间戳的话看下要不要转 datetime_object = datetime.datetime.strptime( log_time_str, '%Y-%m-%d %H:%M:%S') log_time = datetime_object.timestamp() if start_time <= log_time <= end_time: if 'no such element' in line: return True def error_judge(self): if network_error(self.log_path, self.port, self.end_time, self.start_time) == True and no_finf_elemen(self.log_path, self.end_time, self.start_time) == True: pass # 不执行重跑 else: pass # 执行重跑
以下是对代码的优化建议:
1. class error 中的 __init__ 方法中有一个无用的 pass,可以删除。
2. class error 中的 network_error 和 no_finf_element 方法中有相同的代码,可以将重复代码提取出来,写成一个私有方法,然后在这两个方法中调用。
3. network_error 和 no_finf_element 方法中的循环读取文件的方式不够高效,可以使用 readline() 方法替换 readlines() 方法,每次只读取一行,这样可以减少内存占用。
4. network_error 和 no_finf_element 方法中可以使用 with open(log_path, 'r') as f: 的方式打开文件,这样可以自动关闭文件,避免忘记关闭导致的资源泄漏。
5. 在 error_judge 方法中,if network_error(...) == True 可以简写成 if network_error(...):
6. 在 error_judge 方法中,if no_finf_elemen(...) == True 应该是 if no_finf_element(...) == True:
下面是优化后的代码:
```python
import datetime
class error:
def __init__(self, log_path, port, end_time, start_time=0):
self.log_path = log_path
self.port = port
self.end_time = end_time
self.start_time = start_time
def _check_error(self, log_path, end_time, start_time, error_str):
with open(log_path, 'r') as f:
line = f.readline()
while line:
log_time_str = line.split()[0]
datetime_object = datetime.datetime.strptime(log_time_str, '%Y-%m-%d %H:%M:%S')
log_time = datetime_object.timestamp()
if start_time <= log_time <= end_time:
if error_str in line:
return True
line = f.readline()
return False
def network_error(self):
return self._check_error(self.log_path, self.end_time, self.start_time, self.port)
def no_finf_element(self):
return self._check_error(self.log_path, self.end_time, self.start_time, 'no such element')
def error_judge(self):
if self.network_error() and self.no_finf_element():
pass # 不执行重跑
else:
pass # 执行重跑
```
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