After installing pipdeptree it is not in my path

Question

To view dependencies of a pip package the utility pipdeptree has been recommended. I installed it via instructions on the pypi site . It should be possible simply to type pipdeptree .. but it's not found.

I do have the conda init code in my ~/.bash_profile that changes the $PATH - but that's common so would seem unlikely to be the issue. What else should I look for? Here's my path

/Users/steve/opt/miniconda3/envs/py38/bin:/Users/steve/opt/miniconda3/condabin:/opt/homebrew/bin:/Users/steve/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/homebrew/bin:/opt/brew/bin:.:/Users/steve/bin