Fix when reading np.int64 integers (#60)

* Fix when reading np.int64 integers

* Update changelog

* Fix no station within selected dist with new pygeogrids version

CHANGELOG.rst

@@ -12,6 +12,8 @@ Version 1.3.1
 
 - Added functionality to provide fill values with predefined custom metadata readers.
 - Documentation and constants updated.
+- ``ISMN_Interface.read_ts`` raised an error when np.int64 was passed.
+- Fixed for `pygeogrids>=0.4.2` where dist=np.inf can be returned if
 
 Version 1.3.0
 =============
@@ -21,7 +23,6 @@ Version 1.3.0
 - RTD build uses a separate, smaller environment.yml now (and mamba)
 - ISMN_Interface now has a method to create an instance of itself for a selection of  (`ISMN_Interface.subset_from_ids`)
 
-
 Version 1.2.0
 =============
 

src/ismn/interface.py

@@ -24,14 +24,11 @@
 from pathlib import Path
 from tempfile import gettempdir
 import platform
-import os
 import sys
-from typing import Optional, Union
-
-import numpy as np
 import pandas as pd
 
-from ismn.filecollection import IsmnFileCollection, _load_metadata_df
+from ismn.filecollection import IsmnFileCollection
+from collections.abc import Iterable
 from ismn.components import *
 from ismn.const import *
 from ismn.base import IsmnRoot
@@ -542,8 +539,7 @@ def read_ts(self, idx, return_meta=False):
             `return_meta=False`. If multiple indices were passed, this is a
             DataFrame with the index as columns, otherwise a Series.
         """
-
-        if isinstance(idx, int):
+        if not isinstance(idx, Iterable):
             filehandler = self.__file_collection.get_filehandler(idx)
             if return_meta:
                 return filehandler.read_data(), filehandler.metadata.to_pd()
@@ -608,7 +604,7 @@ def find_nearest_station(self,
         gpi, d = self.collection.grid.find_nearest_gpi(
             lon, lat, max_dist=max_dist)
 
-        if len(np.atleast_1d(gpi)) == 0:
+        if (len(np.atleast_1d(gpi)) == 0) or (d == np.inf):
             stat = None
             d = None
         else: