lhapdf dependency #65
Description
I am having some problems running the example code in the README:
In [1]: from pdfflow import mkPDFs
...: import tensorflow as tf
...:
...: pdf = mkPDFs("NNPDF31_nnlo_as_0118", [0,2])
...: x = tf.random.uniform([10], dtype=tf.float64)
...: q2 = tf.random.uniform([10], dtype=tf.float64)*20 + 10
...: pid = tf.cast([-1,21,1], dtype=tf.int32)
...:
...: result = pdf.xfxQ2(pid, x, q2)
[ERROR] Data directory for LHAPDF not found, you can use the LHAPDF_DATA_PATH environ variable
---------------------------------------------------------------------------
ModuleNotFoundError Traceback (most recent call last)
File ~/python_envs/qibo/lib/python3.12/site-packages/lhapdf_management/configuration.py:117, in _get_lhapdf_datapath(best_guess)
116 try:
--> 117 import lhapdf
119 return Path(lhapdf.paths()[0])
ModuleNotFoundError: No module named 'lhapdf'
During handling of the above exception, another exception occurred:
FileNotFoundError Traceback (most recent call last)
Cell In[1], line 4
1 from pdfflow import mkPDFs
2 import tensorflow as tf
----> 4 pdf = mkPDFs("NNPDF31_nnlo_as_0118", [0,2])
5 x = tf.random.uniform([10], dtype=tf.float64)
6 q2 = tf.random.uniform([10], dtype=tf.float64)*20 + 10
File ~/python_envs/qibo/lib/python3.12/site-packages/pdfflow/pflow.py:97, in mkPDFs(fname, members, dirname)
95 if dirname is None:
96 try:
---> 97 dirname = find_pdf_path(fname)
98 except ValueError as e:
99 raise ValueError(f"mkPDFs need a directory") from e
File ~/python_envs/qibo/lib/python3.12/site-packages/pdfflow/configflow.py:109, in find_pdf_path(pdfname)
107 if _data_path:
108 all_paths.append(_data_path)
--> 109 all_paths.append(lhapdf_environment.datapath)
111 # Return whatever path has the pdf inside
112 for path in all_paths:
File ~/python_envs/qibo/lib/python3.12/site-packages/lhapdf_management/configuration.py:52, in _Environment.datapath(self)
50 """Return the lhapdf datapath, don't populate until first used"""
51 if self._datapath is None:
---> 52 self._datapath = _get_lhapdf_datapath()
53 return self._datapath
File ~/python_envs/qibo/lib/python3.12/site-packages/lhapdf_management/configuration.py:127, in _get_lhapdf_datapath(best_guess)
123 return Path(sys.prefix) / "share" / "LHAPDF"
124 logger.error(
125 "Data directory for LHAPDF not found, you can use the LHAPDF_DATA_PATH environ variable"
126 )
--> 127 raise FileNotFoundError(
128 "No LHAPDF data directory found, you can create it with `lhapdf-management update --init`"
129 )
FileNotFoundError: No LHAPDF data directory found, you can create it with `lhapdf-management update --init`I am running on mac under python3.12.8, is lhapdf needed to run this?