Python Module issues

Question

Im pretty new to python, and have been having a rough time learning it. I have a main file

import Tests
from Tests import CashAMDSale

CashAMDSale.AMDSale()

and CashAMDSale

import pyodbc
import DataFunctions
import automa
from DataFunctions import *
from automa.api import *

def AMDSale():
    AMDInstance = DataFunctions.GetValidAMD()

And here is GetValidAMD

import pyodbc

def ValidAMD(GetValidAMD):
     (short method talking to a database)

My error comes up on the line that has AMDInstance = DataFunctions.GetValidAMD()

I get the error AttributeError: 'module' object has no attribute 'GetValidAMD'

I have looked and looked for an answer, and nothing has worked. Any ideas? Thanks!

Can you post the source code of the ``DataFunctions`` module? — Dan Gittik, Jun 26 '15 at 16:45

Dan Gittik · Answer 1 · 2015-06-26T17:37:16.283

When you create the file foo.py, you create a python module. When you do import foo, Python evaluates that file and places any variables, functions and classes it defines into a module object, which it assigns to the name foo.

# foo.py
x = 1
def foo():
    print 'foo'

>>> import foo
>>> type(foo)
<type 'module'>
>>> foo.x
1
>>> foo.foo()
foo

When you create the directory bar with an __init__.py file, you create a python package. When you do import bar, Python evaluates the __init__.py file and places any variables, functions and classes it defines into a module object, which it assigns to the name bar.

# bar/__init__.py
y = 2
def bar():
    print 'bar'

>>> import bar
>>> type(bar)
<type 'module'>
>>> bar.y
2
>>> bar.bar()
bar

When you create python modules inside a python package (that is, files ending with .py inside directory containing __init__.py), you must import these modules via this package:

>>> # place foo.py in bar/
>>> import foo
Traceback (most recent call last):
    ...
ImportError: No module named foo
>>> import bar.foo
>>> bar.foo.x
1
>>> bar.foo.foo()
foo

Now, assuming your project structure is:

main.py
DataFunctions/
    __init__.py
    CashAMDSale.py
        def AMDSale(): ...
    GetValidAMD.py
        def ValidAMD(GetValidAMD): ...

your main script can import DataFunctions.CashAMDSale and use DataFunctions.CashAMDSale.AMDSale(), and import DataFunctions.GetValidAMD and use DataFunctions.GetValidAMD.ValidAMD().

I should have clarified my folder structure, sorry! Its `main.py DataFunctions/ __init__.py GetValidAMD.py Tests/ __init__.py CashAMDSale.py` — Shikumaru, Jun 26 '15 at 17:05

devhallo · Accepted Answer · 2015-06-26T17:20:48.480

1

DataFunctions is a folder, which means it is a package and must contain an __init__.py file for python to recognise it as such.

when you import * from a package, you do not automatically import all it's modules. This is documented in the docs

so for your code to work, you either need to explicitly import the modules you need:

import DataFunctions.GetValidAMD

or you need to add the following to the __init__.py of DataFunctions:

__all__ = ["GetValidAMD"]

then you can import * from the package and everything listen in __all__ will be imported

edited Jun 26 '15 at 17:20

answered Jun 26 '15 at 17:02

devhallo

337
3
13

that worked, thanks for the help, i didnt know that! :) – Shikumaru Jun 26 '15 at 17:18

score 0 · Answer 3 · edited May 23 '17 at 12:22

0

Check out this.

It's the same problem. You are importing DataFunctions which is a module. I expct there to be a class called DataFunctions in that module which needs to be imported with

from DataFunctions import DataFunctions
...
AMDInstance = DataFunctions.GetValidAMD()

edited May 23 '17 at 12:22

Community

1
1

answered Jun 26 '15 at 16:58

Lawrence Benson

1,398
1
16
33

Python Module issues

3 Answers3