#Module gamale.py
#The gamale (GAlactic MAgnetic LEns) module is a tool for handling galactic magnetic field lenses. The lenses can be created with the lens-factory: https://git.rwth-aachen.de/astro/lens-factory . Lenses provide information of the deflection of cosmic rays, consisting of matrices mapping a cosmic ray's extragalactic origin to the observed direction on Earth. They are healpy based (https://healpy.readthedocs.io) and typically given in the nside=64 resolution to have an angular resolution of about 0.5 degrees. Thus, the matrices are of shape 49152 x 49152, and because of their size saved in scipy sparse format. Individual matrices ('lens parts') represent the deflection of particles in a specific rigidity range. One lens consists of multiple .npz-files (the lens parts) and a .cfg-file including information about the simulation and the rigidity range of the lens parts.
#The following code requires a galactic field lens on your hard drive. First, we load the lens and a lens part.
# Loading a lens
lens_path = '/path/to/config/file.cfg'
lens = gamale.Lens(lens_path)
# Loading the lens part corresponding to a particle of energy log10e and charge z
log10e = 19 # Make sure that the rigidity is covered in your lens
z = 1
lens_part = lens.get_lens_part(loog10e=log10e, z=z)
# Alternatively, a lens part can be loaded directly
lens_part_path = '/path/to/lens/part.npz'
lens_part = gamale.load_lens_part(lens_part_path)
Here how can i defined gamble
It seems like you haven't added gamale into your environment before trying to load the lens. You will get the same error by trying to call gamale in a clean Python environment.
Can you show the earlier code blocks in your notebook?
I think you still need to import gamale into the Python environment by using "import gamale".
ileNotFoundError Traceback (most recent call last) in 8 from astrotools import gamale as gamale 9 lens_path = '/path/to/config/file.cfg' ---> 10 lens = gamale.Lens(lens_path) 11 12 # Loading the lens part corresponding to a particle of energy log10e and charge z ~/anaconda3/lib/python3.7/site-packages/astrotools/gamale.py in __init__(self, cfname) 187 self.max_column_sum = None # maximum of column sums of all matrices 188 self.cfname = cfname --> 189 self.load(cfname) 190 191 def load(self, cfname): ~/anaconda3/lib/python3.7/site-packages/astrotools/gamale.py in load(self, cfname) 203 204 # read cfg header, to find nside and stat --> 205 with open(cfname) as f: 206 for line in f: 207 if 'nside' in line: FileNotFoundError: [Errno 2] No such file or directory: '/path/to/config/file.cfg'
The '/path/to/config/file.cfg' (block 34 line 8) and 'path/to/lens/part.npz' (block 34 line 17) need to be changed to the locations of the files on your system. The paths provided in the code are just placeholders.
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