Setting Pythonpath programmatic

[Barry Scott]

> On 14 Dec 2019, at 16:00, Prasad Rajassekaran <prasadautomationtesting at gmail.com> wrote:
> 
> 0
> 
> 
> Aim:-
> 
> I would want to set python path programmatic in my project. So that, all other directories files can be imported without any issues.
> 
> Problem statement:-
> 
> I used to add all the folders & sub-folders in environment variables under PYTHONPATH but this has two constrains.
> 
> 1, Any new folders created need to be added in environment variables all the times. After certain limit, environment variables will not be accepted new path reference due to characters limitaion.
> 
> - Error: This environment variable is too large. This dialog allows setting values up to 2047 characters long.
> 
> 2, Secondly, all the team members in my team need to perform the same activity manually all the times.
> 
> Tried self solution:-
> 
> Created a sample folder and added the below code before main import files and ran from command prompt which worked perfectly fine.
> 
> **FilePath: foo/Python/Learning&Development/Pratice/Directory1/File1.py**
> 
> class File1():
> 
>    def parent(self):
>        return "I am from File1"
> 
> **FilePath: foo/Python/Learning&Development/Pratice/Directory2/File2.py**
> 
>    import sys
> try:
>    sys.path.index('foo/Python/Learning&Development')
>    sys.path.index('foo/Python/Learning&Development/Pratice')
>    sys.path.index('foo/Python/Learning&Development/Pratice/Directory1')
>    sys.path.index('foo/Python/Learning&Development/Pratice/Directory2')
> except ValueError:
>    sys.path.append('foo/Python/Learning&Development')

That's your top folder.

>     sys.path.append('foo/Python/Learning&Development/Pratice')
>    sys.path.append('foo/Python/Learning&Development/Pratice/Directory1')
>    sys.path.append('foo/Python/Learning&Development/Pratice/Directory2')

But what are these? Do you have modules so can access from the top folder?

> 
> from Pratice.Directory1.File1 import File1 as f

Only works if you have created modules on the disk.

Do you have __init__.py in Pratice, Practice/Directot1 etc?

Barry


> 
> 
> class File2():
> 
>    def child(self):
>        return f.parent(self)
> Results:
> 
> I am from File1
> 
> Now I wish to convert the sys.path as a single method and call automatically before running any .py file in the project folder.
> 
> So, on trail basis, I created 'init.py' file added the same piece (sys.path) of code, commented the same code in File2.py and run it but ended up with file import error.
> 
> **FilePath: foo/Python/Learning&Development/Pratice/Directory2/__init__.py**
> 
> import sys
> try:
>    sys.path.index('foo/Automation/Python/Learning&Development')
>    sys.path.index('foo/Automation/Python/Learning&Development/Pratice')
>    sys.path.index('foo/Automation/Python/Learning&Development/Pratice/Directory1')
>    sys.path.index('foo/Automation/Python/Learning&Development/Pratice/Directory2')
> except ValueError:
>    sys.path.append('foo/Automation/Python/Learning&Development')
>    sys.path.append('foo/Automation/Python/Learning&Development/Pratice')
> sys.path.append('foo/Automation/Python/Learning&Development/Pratice/Directory1') sys.path.append('foo/Automation/Python/Learning&Development/Pratice/Directory2')
> 
> **FilePath: foo/Python/Learning&Development/Pratice/Directory1/File1.py**
> 
> class File1():
> 
>    def parent(self):
>        return "I am from File1"
> 
> **FilePath: foo/Python/Learning&Development/Pratice/Directory2/File2.py**
> 
> # import sys
> # try:
>    # sys.path.index('foo/Python/Learning&Development')
>    # sys.path.index('foo/Python/Learning&Development/Pratice')
>    # sys.path.index('foo/Python/Learning&Development/Pratice/Directory1')
>    # sys.path.index('foo/Python/Learning&Development/Pratice/Directory2')
> # except ValueError:
>    # sys.path.append('foo/Python/Learning&Development')
>    # sys.path.append('foo/Python/Learning&Development/Pratice')
>    # sys.path.append('foo/Python/Learning&Development/Pratice/Directory1')
>    # sys.path.append('foo/Python/Learning&Development/Pratice/Directory2')
> 
> from Pratice.Directory1.File1 import File1 as f
> 
> 
> class File2():
> 
>    def child(self):
>        return f.parent(self)
> Results:
> 
> Traceback (most recent call last):
>  File "File2.py", line 13, in <module>
>    from Pratice.Directory1.File1 import File1 as f
> ModuleNotFoundError: No module named 'Pratice
> 
> Could someone help me on this problem? I would want the same piece of code to be executed before running any of the .py file in my project folder. So that, import error would not come into picture.
> 
> Expected: Python path should be set automatically by default and import error should not occur while running any python file in the project.
> -- 
> https://mail.python.org/mailman/listinfo/python-list
>