Installation issues (requires numpy)

[jason-neal]

Hi, I tried cloning this to work on it in a new conda environment.
Running the command
pip install -r requirements.txt
results in ...

Collecting PyAstronomy (from -r requirements.txt (line 5))
Using cached PyAstronomy-0.10.1.tar.gz
Complete output from command python setup.py egg_info:
Please install 'numpy' first.
Traceback (most recent call last):
File "", line 1, in
File "/tmp/pip-build-wM5T99/PyAstronomy/setup.py", line 153, in
class WithExtCommand(Command):
NameError: name 'Command' is not defined

It seems PyAstronomy needs numpy to be installed properly. I tried reordering the requirements.txt file so PyAstronomy was last but that did not solve the issue. It downloads them all first before installing.

I don't know if there is an automatic fix to this solution to this other than running
pip install numpy first. (which works).

[j-faria]

Does this work?

conda create -n new_environment_name --file requirement.txt

[jason-neal]

No because PyAstronomy is not in conda I think.

conda create  -n new_env --file requirements.txt  
Fetching package metadata .......
Solving package specifications: .
Error: Package missing in current linux-64 channels: 
  - pyastronomy

You can search for packages on anaconda.org with

    anaconda search -t conda pyastronomy

[DanielAndreasen]

Maybe I do something wrong, but when I run conda create -n name; source activate name this enviroment has all the packages installed from my root enviroment...

I don't think this is a big concern as most people who might use this will have numpy installed. But let's fix it anyway.

[jason-neal]

I did a quick google search and this thread has some solutions.

Basically you need to download/build/install one at a time using something like
xargs -L 1 pip install < requirements.txt
-L1 specifies that it only reads( and installs) one line at a time from requirements.

Maybe this can be added to the README.

[DanielAndreasen]

Better to just make a Makefile for this.

[jason-neal]

Yea I checked and I don't have PyAstronomy in my root conda. The installation did work if there was already built/cached versions of the packages known to pip.

[DanielAndreasen]

Maybe this can be a solution: https://github.com/pypa/pipfile

[jason-neal]

This is the result of pypa/pip#25 which is a common issue.
I have opened sczesla/PyAstronomy#22 to fix pyastronomy's setup.py file.

[j-faria]

Wondering if https://github.com/sdispater/poet would solve this...

[jason-neal]

I tested it and it still gives the same error. Neat project though. Yet another way to package python....

Simplified the problem is the pyastronomy setup.py file has a bare import numpy.... call. This is run by pip when searching all the requirements to find all the dependencies to install. Since it has not installed numpy yet it fails. Hopefully it can be changed on pyastronomy's side and the problem will disappear.

[jason-neal]

I have added a version dependence in the requirements.txt file for version pyastronomy>=0.11. The recent 0.11 release resolved the issue discussed here.