Hi all
My project comprises a number of modules, split into packages. Modules
frequently need to access the contents of other modules, in the same or in a
different package. I am getting better at it, but I still occasionally bump
my head against circular imports, and have to fiddle around until it settles
down again. Not ideal, I know.
I have just noticed something odd, and I wondered if it might provide a
solution, or if it is a dangerous sidetrack. Here is a simple example -
/test
| start.py
/a
| aa.py
/b
| bb.py
start.py
import a.aa
import b.bb
a.aa.aaa()
b.bb.bbb()
aa.py
import b
def aaa():
print('in aaa')
b.bb.bbbb()
def aaaa():
print('in aaaa')
bb.py
import a
def bbb():
print('in bbb')
a.aa.aaaa()
def bbbb():
print('in bbbb')
c:\test>start.py
in aaa
in bbbb
in bbb
in aaaa
The surprising thing is that, within aa.py, I just have to say 'import b',
and I can access 'b.bb.bbbb', and the same applies to 'bb.py'.
That makes me wonder if, in my project, I can import all modules inside
'start.py', and then just use 'import package_name' inside each module?
Another question - I thought that, because aa.py and bb.py are in different
sub-directories, I would have to set them up as packages by adding
'__init__.py' to each one, but it works fine without that. What am I
missing?
I am using python 3.4.
Any comments appreciated.
Frank Millman
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