Same jupyter notebook, runs fine, imports correctly

from __future__ import print_function
from calc import calc
from calc import oper2
from calc import calcerr


print("calc")
calc =calc1()
calc.add_custom("operators.json")
calc.print_oper()
while True:
    user = input("")
    if user == 'q':
        break
    try:
        calc.addto_q(user)
    except calcerr as Error:
        print('error', Error)
    calc.print_q()