def show_options():
Option.show_options(_options)
optionNum = int(input("Choose option: "))
if 1 <= optionNum <= len(_options):
_options[optionNum - 1].fun()
else:
clearScr()
print("Error!!")
print("Enter the number of an option.")
show_options()
def show_calculations():
Option.show_options(_calculations)
calcNum = int(input("Choose calculation: "))
clearScr()
if 1 <= calcNum < len(_calculations):
_calculations[calcNum - 1].fun()
print("---------------------------------------")
back()
elif calcNum == len(_calculations):
back()
else:
print("Error!!")
print("Enter the number of a calculation.")
show_calculations()
