On Friday, 6 July 2018 09:32:08 UTC+5:30, Cameron Simpson wrote: > On 05Jul2018 19:56, Sharan Basappa <sharan.basa...@gmail.com> wrote: > >I have implemented my first program in python that uses ML to do some > >classification task. The whole code is in a single file currently. > >It contains executable code as well as functions. > > I presume when you write "executable code" you mean some kind of "main > program" > that just runs when you run the .py file? > > >At the end of the program, I have series of calls that is used to test my > >code. > >Now, I would like to re-structure this to separate test code from the > >program. > >As I have not done this in Python, I am a bit lost. > > > >Please let me know if the following understanding of mine is correct. > >I need to put the program code in a separate file and organize every > >executable code in some form of function. If any code exists outside of > >function then it is not executable by importing. > > This is not quite right. Because Python is a dynamic language, importing a > file > actually runs it. That is how the functions etc get defined. > > So what you need to do is arrange that your "series of calls that is used to > test my code" live in their own function, and that that function only gets > run > if the file is directly run. > > Fortunately, this is a very common, almost universal, requirement and there > is > a standard idom for arranging it. > > Support you have your code in the file "foo.py" (because I need a concrete > filename for the example). It might look like this at present: > > def func1(...): > > def func2(...): > > x = func1(...) > y = func2(...) > print(x + y) > > i.e. some function definitions and then you testing code. > > Now, you can write another file "foo_tests.py" which starts like this: > > import foo > ... run some tests of foo.func1, foo.func2 etc ... > > The issue is that as written, foo.py will run your test calls during the > import. Restructure foo.py like this: > > def main(): > x = func1(...) > y = func2(...) > print(x + y) > > def func1(...): > > def func2(...): > > if __name__ == '__main__': > main() > > This is very standard. When you run a python file directly the built in > __name__ variable contains the string "__main__". This tells you that you're > running it as a "main program" i.e. directly. > > If you import the file instead, as from your planned testing file, the > __name__ > variable will contain the string "foo" because that is the name of the module. > > So that "main" function and the "if" at the bottom is standard Python > boilerplate code for what you're trying to do. > > >Import this in my test program (file/module) and then initiate calls > >present > >in the program. > >If there is some simple example, it would help a lot. > > Now you can do this part. > > Cheers, > Cameron Simpson <c...@cskk.id.au>
Cameron. thanks. this is much more easier than I thought. -- https://mail.python.org/mailman/listinfo/python-list
