MP doesn't allow me to query anymore

Materials Project Materials Project Data/API
,
1

I am qerying a lot from MP by using the following commands :

a = MPRester(‘xxxMY_API_KEYxxx’)
halides = a.get_entries({“elements”:{“$in”:[“Cl”,“Br”,“I”,“F”],“$all”:[“Li”]}}) #2654 materials found in MP
for i in halides:
band_gap = a.get_bandstructure_by_material_id(str(‘'’+halides[12].entry_id+‘'’)).get_band_gap()

And I get the following error:

MPRestError: REST query returned with error status code 404. Content: b’\n\n\n\n\n Materials Project :: 404 \n \n\n \n \n \n \n <link rel=“search”\n type=“application/opensearchdescription+xml”\n title=“Search Materials Project”\n href='/static/opensearch.25669ffdaab0.xml'>\n <link rel=“shortcut icon” href='/static/images/favicon.00f51d402f3d.png' />\n <link rel=“stylesheet” href='/static/stylesheets/less/compiled/nucleus.5db1710fde48.css' charset=“utf-8”>\n <link rel=“stylesheet” href='/static/stylesheets/less/compiled/app.b2b36524052e.css' charset=“utf-8”>\n \n\n\n\n\n \n \n \n \n\n\n

I know that I have been using the MPRester intensively, but now this error comes up everytime I try to query one material. How can I resume querying (not extensively)?

Thank you in advance !

2

Hi @Yasmine_Benabed, it looks like you’re connecting to our legacy API. Please make sure to use our new client/API with the new API key from your dashboard. See here and here for more information.

3

Hi Patrick, thank you for replying to my message and email ! So I followed the steps as explained on (Getting Started - Materials Project Documentation):

  1. installing mp-api :

python -m pip install mp_api

  1. The installation was successful, I proceeded with a simple code :

import pymatgen
from mp_api.client import MPRester

with MPRester(“my_new_key_from_the_dashboard”) as mpr:
halides = mpr.get_entries({“elements”:{“$in”:[“Cl”,“Br”,“I”,“F”],“$all”:[“Li”]}})
print (len(halides))

  1. I got the following error:

MPRestError: REST query returned with error status code 404 on URL https://api.materialsproject.org/thermo/?formula=elements&limit=1000&fields=entries with message:
Response {“message”:“no Route matched with those values”}

4

Thanks, @Yasmine_Benabed! Could you double-check your mp-api version and make sure it’s the latest (0.33.3)? Your client connecting to /thermo instead of /materials/thermo indicates that it might be outdated.

5

I tried to find the version (mp_api --version) but oddly enough I am returned the following error:

mp_api: command not found

I tried to install mp-api using the git clone procedure and when I get to the step ‘‘python setup.py’’ I am returned the following error:

usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] …]
or: setup.py --help [cmd1 cmd2 …]
or: setup.py --help-commands
or: setup.py cmd --help

I also tried to install this particular version using the command:

python -m pip install mp_api==0.33.3

and I get the following error:

ERROR: Ignored the following versions that require a different python version: 0.19.0 Requires-Python >=3.8; 0.20.0 Requires-Python >=3.8; 0.20.1 Requires-Python >=3.8; 0.20.2 Requires-Python >=3.8; 0.20.4 Requires-Python >=3.8; 0.20.5 Requires-Python >=3.8; 0.20.6 Requires-Python >=3.8; 0.21.0 Requires-Python >=3.8; 0.21.1 Requires-Python >=3.8; 0.21.2 Requires-Python >=3.8; 0.21.3 Requires-Python >=3.8; 0.21.4 Requires-Python >=3.8; 0.21.5 Requires-Python >=3.8; 0.21.6 Requires-Python >=3.8; 0.22.0 Requires-Python >=3.8; 0.22.1 Requires-Python >=3.8; 0.22.2 Requires-Python >=3.8; 0.23.0 Requires-Python >=3.8; 0.23.1 Requires-Python >=3.8; 0.23.2 Requires-Python >=3.8; 0.23.3 Requires-Python >=3.8; 0.23.4 Requires-Python >=3.8; 0.23.5 Requires-Python >=3.8; 0.23.6 Requires-Python >=3.8; 0.24.0 Requires-Python >=3.8; 0.24.1 Requires-Python >=3.8; 0.24.2 Requires-Python >=3.8; 0.24.3 Requires-Python >=3.8; 0.24.4 Requires-Python >=3.8; 0.24.5 Requires-Python >=3.8; 0.24.6 Requires-Python >=3.8; 0.24.7 Requires-Python >=3.8; 0.24.8 Requires-Python >=3.8; 0.25.0 Requires-Python >=3.8; 0.25.1 Requires-Python >=3.8; 0.25.2 Requires-Python >=3.8; 0.26.0 Requires-Python >=3.8; 0.26.1 Requires-Python >=3.8; 0.26.2 Requires-Python >=3.8; 0.26.3 Requires-Python >=3.8; 0.26.4 Requires-Python >=3.8; 0.27.0 Requires-Python >=3.8; 0.27.1 Requires-Python >=3.8; 0.27.2 Requires-Python >=3.8; 0.27.3 Requires-Python >=3.8; 0.27.4 Requires-Python >=3.8; 0.27.5 Requires-Python >=3.8; 0.28.1 Requires-Python >=3.8; 0.29.0 Requires-Python >=3.8; 0.29.1 Requires-Python >=3.8; 0.29.2 Requires-Python >=3.8; 0.29.3 Requires-Python >=3.8; 0.29.4 Requires-Python >=3.8; 0.29.5 Requires-Python >=3.8; 0.29.6 Requires-Python >=3.8; 0.29.7 Requires-Python >=3.8; 0.29.8 Requires-Python >=3.8; 0.30.0 Requires-Python >=3.8; 0.30.1 Requires-Python >=3.8; 0.30.10 Requires-Python >=3.8; 0.30.11 Requires-Python >=3.8; 0.30.2 Requires-Python >=3.8; 0.30.3 Requires-Python >=3.8; 0.30.4 Requires-Python >=3.8; 0.30.5 Requires-Python >=3.8; 0.30.6 Requires-Python >=3.8; 0.30.7 Requires-Python >=3.8; 0.30.8 Requires-Python >=3.8; 0.30.9 Requires-Python >=3.8; 0.31.0 Requires-Python >=3.8; 0.31.1 Requires-Python >=3.8; 0.31.2 Requires-Python >=3.8; 0.32.0 Requires-Python >=3.8; 0.32.1 Requires-Python >=3.8; 0.33.0 Requires-Python >=3.8; 0.33.0rc1 Requires-Python >=3.8; 0.33.0rc2 Requires-Python >=3.8; 0.33.0rc3 Requires-Python >=3.8; 0.33.0rc4 Requires-Python >=3.8; 0.33.0rc5 Requires-Python >=3.8; 0.33.0rc6 Requires-Python >=3.8; 0.33.1 Requires-Python >=3.8; 0.33.2 Requires-Python >=3.8; 0.33.3 Requires-Python >=3.8
ERROR: Could not find a version that satisfies the requirement mp_api==0.33.3 (from versions: 0.2.1, 0.2.2, 0.2.3, 0.3.0, 0.4.0, 0.4.1, 0.5.0, 0.5.1, 0.6.0, 0.6.1, 0.7.0, 0.7.1, 0.8.0, 0.9.0, 0.9.1, 0.10.0, 0.10.1, 0.10.2, 0.11.0, 0.11.1, 0.11.2, 0.11.3, 0.11.4, 0.12.0, 0.12.1, 0.12.2, 0.13.0, 0.14.0, 0.14.1, 0.15.0, 0.15.1, 0.16.0, 0.16.1, 0.16.2, 0.16.3, 0.16.4, 0.16.5, 0.17.0, 0.18.0)
ERROR: No matching distribution found for mp_api==0.33.3

I have python 3.7.16, is it not compatible ?

6

Yes, 3.7 is too old. You need at least 3.8.

1 Like
8

@Yasmine_Benabed Following up on how to translate your query to the new API client. It looks like you’re trying to retrieve band gaps for all the materials that contain Li (mandatory) and AT LEAST ANY of the halide elements (one or several simultaneously). The strategy would be to retrieve all materials containing Li and then filter the results for compositions containing one of Cl, Br, I, or F:

from mp_api.client import MPRester

with MPRester("your-api-key-here") as mpr:
    docs = mpr.summary.search(
        elements=["Li"],
        fields=[
            "material_id", "formula_pretty", "chemsys",
            "band_gap", "composition"
        ]
    )

filtered_docs = [
    doc for doc in docs
    if any(h in doc.composition for h in ["Cl", "Br", "I", "F"])
]

filtered_docs contains 3102 materials which seems to be close enough to what you’re getting for the (outdated) data on legacy. HTH.

1 Like
9

This is very helpful, thank you Patrick !

10