Update max values in settings (#875)

* Set max value for api client settings

* Add upper bound on ID list queries

* Linting

* Spelling

mp_api/client/core/settings.py

@@ -9,10 +9,11 @@
 from mp_api.client import __file__ as root_dir
 
 PMG_SETTINGS = _load_pmg_settings()
-_NUM_PARALLEL_REQUESTS = PMG_SETTINGS.get("MPRESTER_NUM_PARALLEL_REQUESTS", 8)
-_MAX_RETRIES = PMG_SETTINGS.get("MPRESTER_MAX_RETRIES", 3)
+_NUM_PARALLEL_REQUESTS = min(PMG_SETTINGS.get("MPRESTER_NUM_PARALLEL_REQUESTS", 8), 8)
+_MAX_RETRIES = min(PMG_SETTINGS.get("MPRESTER_MAX_RETRIES", 3), 3)
 _MUTE_PROGRESS_BAR = PMG_SETTINGS.get("MPRESTER_MUTE_PROGRESS_BARS", False)
 _MAX_HTTP_URL_LENGTH = PMG_SETTINGS.get("MPRESTER_MAX_HTTP_URL_LENGTH", 2000)
+_MAX_LIST_LENGTH = min(PMG_SETTINGS.get("MPRESTER_MAX_LIST_LENGTH", 40000), 40000)
 
 try:
     CPU_COUNT = cpu_count()
@@ -82,5 +83,9 @@ class MAPIClientSettings(BaseSettings):
         "0.54.0", description="Minimum compatible version of emmet-core for the client."
     )
 
+    MAX_LIST_LENGTH: int = Field(
+        _MAX_LIST_LENGTH, description="Maximum length of query parameter list"
+    )
+
     class Config:
         env_prefix = "MPRESTER_"

mp_api/client/core/utils.py

@@ -10,6 +10,8 @@
 from pydantic._internal._utils import lenient_issubclass
 from pydantic.fields import FieldInfo
 
+from mp_api.client.core.settings import MAPIClientSettings
+
 
 def validate_ids(id_list: list[str]):
     """Function to validate material and task IDs.
@@ -23,6 +25,12 @@ def validate_ids(id_list: list[str]):
     Returns:
         id_list: Returns original ID list if everything is formatted correctly.
     """
+    if len(id_list) >= MAPIClientSettings().MAX_LIST_LENGTH:
+        raise ValueError(
+            "List of material/molecule IDs provided is too long. Consider removing the ID filter to automatically pull"
+            " data for all IDs and filter locally."
+        )
+
     pattern = "(mp|mvc|mol|mpcule)-.*"
 
     for entry in id_list: