lazy import of evaluate (#1957)

Signed-off-by: Assaf Toledo <assaf.toledo@ibm.com>

Author: assaftibm

src/unitxt/metrics.py

@@ -28,7 +28,6 @@
     Union,
 )
 
-import evaluate
 import numpy
 import numpy as np
 import pandas as pd
@@ -82,6 +81,8 @@
 
 @retry_connection_with_exponential_backoff(backoff_factor=2)
 def hf_evaluate_load(path: str, *args, **kwargs):
+    import evaluate
+
     if settings.hf_offline_metrics_path is not None:
         path = os.path.join(settings.hf_offline_metrics_path, path)
     return evaluate.load(