clean up imports in example docs

Author: haileyajohnson

.gitignore

@@ -9,4 +9,5 @@ uv.lock
 # build files
 **/*.egg-info
 **/__pycache__
-**/build
+**/build
+**/.ipynb_checkpoints/

cdippy/nchashes.py

@@ -10,12 +10,8 @@ class NcHashes:
     hashes_url = "http://cdip.ucsd.edu/data_access/metadata/wavecdf_by_datemod.txt"
     new_hashes = {}
 
-    def __init__(self):
-        """
-        Args:
-            hash_file_location (str, optional): A path to the location to store the local copy of HASH.pkl. Defaults to the current directory.
-        """
-        self.load_hash_table()
+    def __init__(self, hash_file_location=""):
+        self.hash_pkl = hash_file_location + "/HASH.pkl"
 
     def load_hash_table(self):
         """