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How to run a module before install?


I had download a module which has the following directory structure:

[XL-Sudoku-Solver_master]
  |__[tests]
  |__[xl_sudoku_solver]
  |__setup.py       |__ __init__.py
  |__problem1.txt   |__ __main__.py
  |__README.md      |__ ...
  |__ ...

The setup.py file has something like this:
---------------------
...
setup(
    name="xl-sudoku-solver",
    version="0.0.1.post3",
    packages=['xl_sudoku_solver'],
    entry_points={
        "console_scripts": [
            "xl-sudoku-solver = xl_sudoku_solver.__main__:main"
        ]
    },
...
----------------

and the __main__.py has:
----------------
...
from . import Solver, load_from_file, load_from_input, load_from_string

def main():
    ...

if __name__ == '__main__':
    main()
----------------

The README.md suggest the way of running it:

pip install xl-sudoku-solver
$ xl-sudoku-solver --time -f problem1.txt 

But I like to run it before install. Is it possible? and how? I had try two ways below but niether works:

1) h:\Temp\XL-Sudoku-Solver-master>py xl_sudoku_solver --time -f problem1.txt
Traceback (most recent call last):
  File "C:\Python34\lib\runpy.py", line 170, in _run_module_as_main
    "__main__", mod_spec)
  File "C:\Python34\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "xl_sudoku_solver\__main__.py", line 5, in <module>
    from . import Solver, load_from_file, load_from_input, load_from_string
SystemError: Parent module '' not loaded, cannot perform relative import

2) h:\Temp\XL-Sudoku-Solver-master>py
Python 3.4.4 (v3.4.4:737efcadf5a6, Dec 20 2015, 19:28:18) [MSC v.1600 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import xl_sudoku_solver
>>>

Can't find the name "main", What to do?


--Jach