'py.test' 不是内部或外部命令，也不是可运行的程序或批处理文件

Question

I started learning python recently and I know my problem may not be sth complicated. I issued below command from my Windows cmd to install pytest framework and its required dependencies

py -3 -m pip install pytest

and then issued: py -3 -m pip install pytest-pep8

to install pep8 plug-in and required dependencies. Both commands were done successfully.

But when I want to run pytest by py.test --pep8 exp1.py command; I get mentioned error.

any ideas?

Answer 1

i am learning python with head first python book, i have been trying to use pytest module but was, not working and even search online everywhere but i could not find the solution the problem but some how, i manage to figure it out. so here's the solution the current version of pytest is version 6.2.2 unfortunately if use it with py.test --pep8 it will not work because it has been deprecated the simple solution is to use this version pip install pytest==2.9.1 and when it's successfully installed when you tried with the py.test --pep8 it will work.

Answer 2

The error you got seems to be due to improper installation of pytest or due to use of py.test in your command.

First, check whether you have pytest installed in your environment. Open command prompt and use the below command,

pytest --version 

You must get an output like,

pytest 6.0.2

If you get an output similar to the above result that means you have installed pytest successfully.

Now, navigate to the folder where your script exp1.py is using cd command in cmd and try running your script as follows,

pytest --pep8 exp1.py

Answer 3

遇到同样的问题，但已通过以下命令解决

python -m pytest

Answer 4

to run pytest along with geting output status in terminal run this in terminal:

pytest -v -s filename.py

if the file is not present, run this in the current directory:

pytest -v -s <filepath>/filename.py