When i start mongo db on macOS console by run command mongod, i got below error message. {“t”:{“$date”:”2020-09-09T10:45:30.049+08:00″},”s”:”E”,  “c”:”NETWORK”,  “id”:23024,   “ctx”:”initandlisten”,”msg”:”Failed to unlink socket file”,”attr”:{“path”:”/tmp/mongodb-27017.sock”,”error”:”Permission denied”}}

In this article, I will tell you how to pass command-line arguments to python script programs in eclipse with PyDev. To develop a python program with eclipse, you should first install the PyDev Eclipse plugin, you can read the article How To Run Python In Eclipse With PyDev.

In this article i will show you an example about how to implement progress bar in python console. It is useful when you write some python console program.

When you run print(‘ hello python ‘) in python code, it always print the text on screen, this is because python standard output is screen console. But we always want to print the text to a file instead of screen console, especially print exception error messages when exception occurred in python source code.

When we run python program, we are creating and running a process to execute the program. Like Linux process, a python process can fork a child process and let the child process to execute another program. In Python, we fork a child process through the subprocess module in the standard library and run an external