pybids: layout.get doesn't find any entities when passed a numpy.int64 value for run

When doing a layout.get(), if the type of the run argument is np.int64, it fails to find any entities. Here’s a minimal reproduction using pybids test data:

In [1]: from os.path import join 
   ...: from bids.analysis import Analysis 
   ...: from bids.analysis.analysis import ContrastInfo, DesignMatrixInfo 
   ...: from bids.layout import BIDSLayout 
   ...: from bids.tests import get_test_data_path 
   ...: import numpy as np 
   ...:  
   ...: def analysis(): 
   ...:     layout_path = join(get_test_data_path(), 'ds005') 
   ...:     layout = BIDSLayout(layout_path) 
   ...:     json_file = join(layout_path, 'models', 'ds-005_type-test_model.json') 
   ...:     analysis = Analysis(layout, json_file) 
   ...:     analysis.setup(scan_length=480, subject=['01', '02']) 
   ...:     return analysis 
   ...: foo = analysis()                                                                                                                                                          

In [2]: layout_path = join(get_test_data_path(), 'ds005') 
   ...: layout = BIDSLayout(layout_path) 
   ...: layout.get_runs()                                                                                                                                                         
Out[2]: [1, 2, 3]

In [3]: layout.get(suffix="bold",subject='01', run=1)                                                                                                                             
Out[3]: [<BIDSImageFile filename='/gpfs/gsfs11/users/MBDU/midla/notebooks/code/pybids/bids/tests/data/ds005/sub-01/func/sub-01_task-mixedgamblestask_run-01_bold.nii.gz'>]

In [4]: layout.get(suffix="bold",subject='01', run=np.int64(1)) 
   ...:                                                                                                                                                                           
Out[4]: []

In [5]: # Now just to show that pybids itself is generating numpy.int64 run values, here's the output from get design matrix                                                      

In [6]: for _, _, ents in foo.steps[0].get_design_matrix(): 
   ...:     break 
   ...: ents                                                                                                                                                                      
Out[6]: 
{'task': 'mixedgamblestask',
 'run': 1,
 'suffix': 'bold',
 'datatype': 'func',
 'subject': '01'}

In [7]: type(ents['run'])                                                                                                                                                         
Out[7]: numpy.int64

In [8]: layout.get(**ents)                                                                                                                                                        
Out[8]: []

In [9]: ents['run']=1 
   ...: layout.get(**ents)                                                                                                                                                        
Out[9]: [<BIDSImageFile filename='/gpfs/gsfs11/users/MBDU/midla/notebooks/code/pybids/bids/tests/data/ds005/sub-01/func/sub-01_task-mixedgamblestask_run-01_bold.nii.gz'>]

And before anyone suggests that the solution is to avoid passing int64s as run numbers, notice that get_design_matrix returns an int64. I’ve reproduced the above results with both 0.9.2 and 0.9.3.