'MPRester' object has no attribute 'search'

[binaynayak]

I am getting the below error while running MPrester from pymatgen. I have updated pymatgen as well. Help me.

from pymatgen.ext.matproj import MPRester
import numpy as np
import pandas as pd

# Load SAXS data
data = load_data('SCOOH_Au10_1to4_NH2_Au5_HCl_1mM_20.0C_00133.avg') # replace with your own data file name and path

# Extract scattering vector and intensity data
q = data['q'] # scattering vector in 1/Angstroms
I = data['Intensity'] # intensity

def load_data(filename):
    """Load the original data into a dataframe"""
    df=pd.read_csv(filename, skiprows=9, sep='\t',
                   names=['q', 'Intensity', 'Error'])
    return df

# Calculate interplanar spacing from peak positions
lambda_ = 1.5418 # X-ray wavelength in Angstroms (replace with your own wavelength)
theta = 2*np.arcsin(q*lambda_/(4*np.pi))
d = lambda_/(2*np.sin(theta/2))

# Set up Materials Project API key
api_key = 'WJykuMzHXfCduDr3pp7ol7O5Y6EZBPe9' # replace with your own Materials Project API key

# Search the Materials Project for potential matches
with MPRester(api_key) as mpr:
    results = mpr.search({'d_hkl': {'$in': [d]}}, ['material_id'])

# Display results
print('Potential matches found in the Materials Project:')
for result in results:
    print('- {}'.format(result['material_id']))

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_18132/291635017.py in <module>
      9 # Search the Materials Project for potential matches
     10 with MPRester(api_key) as mpr:
---> 11     results = mpr.search({'d_hkl': {'$in': [d]}}, ['material_id'])
     12 
     13 # Display results

~\Anaconda3\lib\site-packages\mp_api\client\mprester.py in __getattr__(self, attr)
    204             )
    205         else:
--> 206             raise AttributeError(f"{self.__class__.__name__!r} object has no attribute {attr!r}")
    207 
    208     def get_task_ids_associated_with_material_id(

AttributeError: 'MPRester' object has no attribute 'search'

[janosh]

The filter syntax you're using is Mongo-style which is only supported by the old MPRester in which case the method you want to use is query, not search. However, you're using a new API key which is not compatible with the old MPRester. If you have an old API key, use that and change search to query.

[binaynayak]

I don't have a old API key. how can I convert this program for a new API key.

[janosh]

I don't think the new API supports filtering by d_hkl but I could be wrong there. You can get an old API key at https://legacy.materialsproject.org/open.