-u，-m参数有什么作用？

Question

What do parameters -u , -m mean and what do they do?

for example:

python -u my_script.py 

or

python -m my_script.py

Where can I read about them?

Answer 1

-u is used to force stdin , stdout and stderr to be totally unbuffered, which otherwise is line buffered on the terminal

-m searches sys.path for the named module and runs the corresponding .py file as a script. An example would be timeit module. The command python -m timeit "python script" would return the time taken for the script to execute.

Quoting from the docs

-u

Force stdin , stdout and stderr to be totally unbuffered. On systems where it matters, also put stdin , stdout and stderr in binary mode.

-m <module-name>

Search sys.path for the named module and execute its contents as the __main__ module.

You can read more about them and other options here