[andybak]

In case this scares any new users, I've used nothing more than pip and virtualenv for several years with no issues of note.

[peterkelly]

Seconded. I read this article and thought "nope, not touching any of those tools". I'd rather spend my time building products than spending a week researching the landscape of 10 different package management approaches.

[SSilver2k2]

Same. pip + virtualenv just works.

[philosopherlawr]

There are lots of errors when it comes to reproducing the build on other machines. Pip install -r requirements.txt does not guarantee that you will install the same version of packages on a new machine, and in fact, you will typically not.

[jabwork]

I've never had problems with this when requirements.txt contains package versions

Have you, or are you not using explicit versions supplied by eg pip freeze?

[wepower_ico]

Totally agree. And why not just invest time into pip than invent again.

[linuxftw]

Same. I feel people invent problems in order to not use these tools.