Cannot instantiate libJHTDB()

[tmatsuzawa]

Hi I have installed pyJHTDB on my Mac.
For the first-time uesrs, README suggests running the following lines.

from pyJHTDB import test_plain
test_plain()

However, this raises an error as it cannot instantiate pyJHTDB.libJHTDB(). What is causing this behavior?

To reproduce, run

import numpy as np
import pyJHTDB
from pyJHTDB import libJHTDB

lTDB = pyJHTDB.libJHTDB()

Error message:

OSError                                   Traceback (most recent call last)
<ipython-input-5-16a1b3452a7b> in <module>
      1 from pyJHTDB import test_plain
----> 2 test_plain()

~/Documents/git/takumi/pyJHTDB/pyJHTDB/test.py in test_plain(N)
     65 
     66     # load shared library
---> 67     lTDB = pyJHTDB.libJHTDB()
     68     #initialize webservices
     69     lTDB.initialize()

~/Documents/git/pyJHTDB/pyJHTDB/libJHTDB.py in __init__(self, auth_token)
     45         self.lib = np.ctypeslib.load_library(
     46             self.libname,
---> 47             os.path.abspath(os.path.join(lib_location, os.path.pardir)))
     48         self.authToken = ctypes.c_char_p(auth_token.encode('ascii'))
     49         self.connection_on = False

~/anaconda3/lib/python3.7/site-packages/numpy/ctypeslib.py in load_library(libname, loader_path)
    152                     raise
    153         ## if no successful return in the libname_ext loop:
--> 154         raise OSError("no file with expected extension")
    155 
    156 

OSError: no file with expected extension