Inconsistent results of materials query #964
Description
Python version
3.12.8
Pymatgen version
2025.1.24
Operating system version
macOS 15.2
Current behavior
The following code:
with MPRester(apikey) as mpr:
mp_data = mpr.materials.summary.search(
fields=["material_id", "deprecated", "formula_pretty", "nelements", "structure", "theoretical", "symmetry"]
)
print("Number of materials found:", len(mp_data))
print("Database version", mpr.get_database_version())
returns
Number of materials found: 178580
Database version 2024.12.18
Of these, there are 169385 non deprecated materials, as returned by:
> sum(1 for x in mp_data if not x.deprecated)
This is consistent with the number of the web portal. Good. But now, consider this:
with MPRester(apikey) as mpr:
mp_data = mpr.materials.summary.search(
deprecated=False,
fields=["material_id", "deprecated", "formula_pretty", "nelements", "structure", "theoretical", "symmetry"]
)
print("Number of materials found:", len(mp_data))
print("Database version", mpr.get_database_version())
It is exactly the same query, except I ask for all non deprecated by passing deprecated=False. But it now returns:
Number of materials found: 153902
Database version 2024.12.18
Expected Behavior
I expect the two routes to return the same number (and same list) of non deprecated materials.
Minimal example
Relevant files to reproduce this bug
No response