Readd fhirpath as optional import

fhir_pyrate/pirate.py

@@ -11,7 +11,6 @@
 from types import TracebackType
 from typing import Any, Callable, Dict, Generator, List, Optional, Tuple, Type, Union
 
-import fhirpathpy
 import pandas as pd
 import requests
 from dateutil.parser import parse
@@ -23,6 +22,10 @@
 from fhir_pyrate import Ahoy
 from fhir_pyrate.util import FHIRObj, string_from_column
 from fhir_pyrate.util.bundle_processing_templates import flatten_data, parse_fhir_path
+from fhir_pyrate.util.imports import optional_import
+
+# Note to people from the future. This actually should be an optional import to avoid that, if people want to use another version of antlr, this creates crazy errors that the version does not match. In such cases, it is not possible to use fhirpathpy, but the processing functions can still be used.
+fhirpathpy, _ = optional_import(module="fhirpathpy")
 
 logger = logging.getLogger(__name__)