check imports

[Viesturs]

I have an import statement

1	from Jets.Analysis.Plot import *

I suspect the imports did not run well as when I call

1

Plot()

a loop has an unexpected jump to beginning and the same happens if I write

1

Pllott()

How can I test if the import was successful and diagnose problems?

[Vysero]

Might be easier for people to diagnose your problem if you post a bit more code. However, in general if you import something and it doesn't error than the import is working properly. That being said I could not find any modules called jet; is this a module that you wrote?

[Viesturs]

yes, that is a custom made module.
But the problem was found in not invoking Plot() with the proper arguments. Python did not supply any error statements.

[perfringo]

Regarding 'star import'. Documentation >>> The Python Tutorial >>> 6. Modules

There is even a variant to import all names that a module defines:

1 2 3

>>> from fibo import * >>> fib(500) 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377

This imports all names except those beginning with an underscore (_). In most cases Python programmers do not use this facility since it introduces an unknown set of names into the interpreter, possibly hiding some things you have already defined.

Note that in general the practice of importing * from a module or package is frowned upon, since it often causes poorly readable code. However, it is okay to use it to save typing in interactive sessions.

[buran]

yes, that is a custom made module.
But the problem was found in not invoking Plot() with the proper arguments. Python did not supply any error statements.

It's a problem with your custom made module, not python. Probably there is poor error handling - i.e. it looks like it catch and ignore/pass all/most exceptions.

[Viesturs]

When I call:

1	from Jets.Analysis.Plot import *

how can I check the path to the module Plot.py

I need this to set a gdb breakpoint in Plot.py.

What environment variables does python use to search for the module Plot.py? How can I check this variable?

The source in Plot.py is imported via a link, which makes matters somewhat more complicated.

[perfringo]

how can I check the path to the module Plot.py

What environment variables does python use to search for the module Plot.py? How can I check this variable?

I would like to point out following pieces of Python documentation:

Documentation >>> The Python Language Reference >>> 7. Simple statements >>> 7.11. The Import statement

Documentation >>> The Python Language Reference >>> 5. The import system

Documentation >>> Python Frequently Asked Questions >>> Programming FAQ >>> Core language >>> What are the "best practices" of using import in a module

Documentation >>> The Python Tutorial >>> Modules

With high probability you can find answers to your questions there and plenty of information how import works in Python.