从包中导入所有模块

Question

I have setup the following structure: Python 201: Creating Modules and Packages . The mymath package is available at that link.

When you run the code below:

import sys
sys.path.append('G:\MyPython\Package')
import mymath
print (mymath.add(4,5))
print (mymath.division(4, 2))
print (mymath.multiply(10, 5))
print (mymath.fibonacci(8))
print (mymath.squareroot(48))

Python Version: 3.4

outer __init__.py contents:

from add import add
from divide import division
from multiply import multiply
from subtract import subtract
from adv.fib import fibonacci
from adv.sqrt import squareroot

My goal is to call division , add , subtract , etc, but if I try to call the module I get:

Traceback (most recent call last):
File "G:\MyPython\Package\myscript.py", line 1, in <module>
import mymath
File "G:\MyPython\Package\mymath\__init__.py", line 1, in <module>
from add import add
ImportError: No module named 'add'

Answer 1

Python 3.x has changed import resolution. You must now specify a full relative import if you want to perform a relative import.

from .add import add