IDA_Xref.py

from idautils import Segments, Functions, XrefsTo, XrefTypeName
from idc import get_segm_name, get_segm_end

class Dictionary(dict):
    def add(self, key, value):
        self[key] = value

xref_dict = Dictionary()

for segea in Segments():
    if get_segm_name(segea) == ".text":
       for funcea in Functions(segea, get_segm_end(segea)):
            count = 0
            for xrefs in XrefsTo(funcea, flags=0):
                if str(XrefTypeName(xrefs.type)) == "Code_Near_Call":
                    count += 1
            if count != 0:
                xref_dict.add(hex(funcea), count)            

for func, count in sorted(xref_dict.items(), key=lambda x: x[1]):
    print(f"{func}: {count} references")