1. 使用print("string", file="")来实现 withopen('./hello','wt')asf:foriinrange(4979):print("chr{0}\t{1}\t{2}".format(1,i*50000,(i+1)*50000),file=f) 2. 使用sys来实现 importsys savedStdout=sys.stdout#保存标准输出流withopen('./hello','wt')asfile:sys.stdout=file#标准输出...
一. 利用sys.stdout将print行导向到你定义的日志文件中,例如:importsys# make a copy of original stdout routestdout_backup = sys.stdout# define the log file that receives your log infolog_file =open("message.log","w")# redirect print output to log filesys.stdout = log_fileprint"Now all pr...
一. 利用sys.stdout将print行导向到你定义的日志文件中,例如:importsys# make a copy of original stdout routestdout_backup = sys.stdout# define the log file that receives your log infolog_file =open("message.log","w")# redirect print output to log filesys.stdout = log_fileprint"Now all pr...
# redirect print output to log file sys.stdout = log_file # 将系统输出切换至log_file print ("Now all print info will be written to message.log") # any command line that you will execute log_file.close() # restore the output to initial pattern sys.stdout = stdout_backup #将系统输出...
FILE *fp = fopen("log.txt","w+"); if(NULL == fp) { printf("open failed "); return -1; } int a = 10; fprintf(fp,"test content %d ",a); fclose(fp); return 0; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.
sys.stdout = Logger(fileName + '.log', path=path)在主函数之前设置，之后调用系统的print 即可...
“printchevron.” In this form, the first expression after the >> must evaluate to a “file-...
withLogger(<file_name>):print(...) 在with 内部运行的代码中,print将不仅会输出到终端,还会写到指定的日志文件进行保存。 另外,也可以像一般的类那样去调用Logger类。 下面是一个例子,使用Python备份文件 # backup.py## Copyright (c) 2021-2022 叶芝秋## Permission is hereby granted, free of charge, ...
filename='log.txt', filemode='w') filename指定了日志的文件名。filemode是日志文件的打开方式。我们这里用的是w,意思是每次都产生一个新的日志。也可以使用a,也就是append。意思是如果log.txt不存在就新建一个,如果已经存在就在就末尾增加新内容。这和普通打开文件时用的open函数是一样的。
log_file=open("message.log","w")# redirect print output to log file sys.stdout=log_fileprint("Now all print info will be written to message.log")# any command line that you will execute...log_file.close()# restore the output to initial pattern ...