fix to make hyperconvo output json-serializable

convokit/hyperconvo/hyperconvo.py

@@ -7,12 +7,13 @@
 from .hypergraph import Hypergraph
 
 def degree_stat_funcs(nan_val):
+    # int wrapping is to convert from np.int64 to int, since np.int64 is not JSON-serializable
     return {
-    "max": np.max,
-    "argmax": np.argmax,
+    "max": lambda l: int(np.max(l)),
+    "argmax": lambda l: int(np.argmax(l)),
     "norm.max": lambda l: np.max(l) / np.sum(l) if np.sum(l) > 0 else 0,
-    "2nd-largest": lambda l: np.partition(l, -2)[-2] if len(l) > 1 else nan_val,
-    "2nd-argmax": lambda l: (-l).argsort()[1] if len(l) > 1 else nan_val,
+    "2nd-largest": lambda l: int(np.partition(l, -2)[-2]) if len(l) > 1 else nan_val,
+    "2nd-argmax": lambda l: int((-l).argsort()[1]) if len(l) > 1 else nan_val,
     "norm.2nd-largest": lambda l: np.partition(l, -2)[-2] / np.sum(l) if (len(l) > 1 and np.sum(l) > 0) else nan_val,
     "mean": np.mean,
     "mean-nonzero": lambda l: np.mean(l[l != 0]) if len(l[l != 0]) > 0 else 0,