When i develop a python program in eclipse pydev project, i need to import a package pymongo into this python program like below source code. import pymongo if __name__ == ‘__main__’: pass But it shows an error message Unresolved import: pymongo in the source code, you can see this error message when you move your mouse …
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 3 methods to find where a python module stores as below. Find python module in sys.path. The python sys module’s path attribute save all python module stored path. Then you can find your python module in the output path directory. >>> import sys >>> >>> sys.path [”, ‘C:\\Users\\zhaosong\\anaconda3\\envs\\python_example\\python38.zip’, …
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 …
When i execute a system program use python subprocess module’s run method in windows, i meet an error message like below. >>> import subprocess >>> subprocess.run([“dir”, “/p”]) Traceback (most recent call last): File “<stdin>”, line 1, in <module> File “C:\Users\zhaosong\anaconda3\envs\env_python_37\lib\subprocess.py”, line 488, in run with Popen(*popenargs, **kwargs) as process: File “C:\Users\zhaosong\anaconda3\envs\env_python_37\lib\subprocess.py”, line 800, in __init__ …
