__init.py__ is not recognized in module-CodePudding

I am trying to understand python packages, to eventually generate my own packages.

I read some tutorial and try to code some examples, but I am not stuck with some understanding of the init.py file.

I try to follow this tutorial, https://timothybramlett.com/How_to_create_a_Python_Package_with___init__py.html

but I get the following error at example3.py

AttributeError: module 'string_func' has no attribute 'stringLength'

This is the tree of files:

.
├── example2.py
├── example3.py
└── string_func
    ├── __init.py__
    ├── stringLength.py
    ├── stringToLower.py
    └── stringToUpper.py

and here the init file

$ cat string_func/__init.py__
from .stringLength import stringLength
from .stringToLower import stringToLower
from .stringToUpper import stringToUpper

and the two shortened examples: example2:

import string_func.stringLength
some_string = "Hello, Universe!"
print(string_func.stringLength.stringLength(some_string))

Returns 16 as expected.

And example3:

import string_func
some_string = "Hello, Universe!"
print(string_func.stringLength(some_string))

I am using:

python3 --version
Python 3.9.9

But got the same error on a python 3.6.x

It feels like the init file is ignored, but I cannot understand why.

CodePudding user response：

it should be

__init__.py

not

__init.py__

CodePudding user response：

Your file name in init.py is not correct. You should rename it as __init__.py The reason for this is after the last "dot" then it should be the file extension, hence your init fill would be a file with "__" extension. Therefore file should be renamed as "__init__.py"