エラー文見ろとかいうクソなことは言うなよ
見てるに決まってるググって調べてるに決まってるからな分かったな
実行文↓　コードは次に貼る

C:\Users\riku1\OneDrive\ドキュメント\RESEARCH\PL>py test.py
Module is called
Classes and Functions are imiported
My name is bob
Human()
I’m tom. My stupid experience is suicide
Stupid
My name is mike and charge is cheaf
Human()
I’m innocense
Stupid
Traceback (most recent call last):
File “test.py”, line 31, in <module>
mp.Human.printcnt()
AttributeError: type object ‘Human’ has no attribute ‘printcnt’

test.py↓

import mypackage.module as mp
#from module import *

#exe
bob=mp.Human(“bob”)
bob.introduce()
bob.sayFuncName()
tom=mp.Stupid(“tom”,”suicide”)
tom.introduce()
tom.sayFuncName()
mike=mp.Criminal(“mike”,”cheaf”)
mike.introduce()
mike.sayFuncName()
maria=mp.Innocent(“maria”)
maria.introduce()
maria.sayFuncName()
”’
bob=Human(“bob”)
bob.introduce()
bob.sayFuncName()
tom=Stupid(“tom”,”suicide”)
tom.introduce()
tom.sayFuncName()
mike=Criminal(“mike”,”cheaf”)
mike.introduce()
mike.sayFuncName()
maria=Innocent(“maria”)
maria.introduce()
maria.sayFuncName()
”’
mp.Human.printcnt()

package\module.py↓

class Human():
count=0

def __init__(a,name=”none”):
a.name=name
Human.count+=1

def introduce(self):
print(“My name is {0}”.format(self.name))

def sayFuncName(self):
print(“Human()”)

@classmethod
def printcnt(cls):
print(cls.count)

class Stupid():
def __init__(self,name=”none”,experience=”A stupid thing”):
self.name=name
self.exp=experience

def introduce(self):
print(“I’m {0}. My stupid experience is {1}”.format(self.name,self.exp))

def sayFuncName(self):
print(“Stupid”)

class Criminal(Human,Stupid):
def __init__(self,name=”None”,charges=”None”):
super().__init__(name)
self.charges=charges

def introduce(self):
print(“My name is {0} and charge is {1}”.format(self.name,self.charges))

class Innocent(Stupid,Human):
def __init__(self,name=”name”):
super().__init__(name)

def introduce(self):
print(“I’m innocense”)

print(“Module is called”)
print(“Classes and Functions are imiported”)

Humanの定義
class Human():
count=0

def __init__(a,name=”none”):
a.name=name
Human.count+=1

def introduce(self):
print(“My name is {0}”.format(self.name))

def sayFuncName(self):
print(“Human()”)

@classmethod
def printcnt(cls):
print(cls.count)

test.pyの呼び出し文
mp.Human.printcnt()

エラー文
Traceback (most recent call last):
File “test.py”, line 31, in <module>
mp.Human.printcnt()
AttributeError: type object ‘Human’ has no attribute ‘printcnt’

https://wandbox.org/permlink/pu3VfKFJhvI6UAi8

mypackage/module.py をまとめて mp. 取るようにしたコード
これで実行できるからたぶんそっちのコードの何かが間違ってる

まるっとコピって実行して動かないなら処理系かOS 依存な気がする

Mac とWandbox では動くからソースは問題ない気がする