On vrijdag 26 januari 2018 22:25:55 CET eil...@themaii.org wrote:
> well, you certainly got me correct! I'm fairly new to python - didn't do
> much coding to learn. Trial by fire, sort of. and the original person who
> put this together is now gone from the company and won't answer any
> outstanding questions. Plus, I *think* he got most of the code from 3rd
> party sources. I could be wrong on that. I was raised on Perl and PL/I (as
> ancient as the latter may seem)
I meant to follow this up, didn't have the opportunity till now.
I strongly suggest to get the python basics down. Your Perl hash is your python
dict, array
is a list (tuple for "read only" lists) and you have you basic scalars with
str, bool, int and
float. And you have objects. In fact, /everything/, including scalars, class
definitions,
methods and functions are objects.
Standard comparison is "==". The "is" comparison is stricter and only used for
boolean
values and the special value None (also handy to know is that functions /
methods that do
not return anything actually return None).
One can think of "is" comparison as "equal to and of the same type":
>>> empty = ''
>>> empty is None
False
>>> empty is False
False
>>> empty is True
False
>>> bool(empty)
False
>>> bool(empty) is False
True
>>> bool(None)
False
If you want a quick intro to Python, I highly suggest Python Tips[1].
project layout[2] and in your case, getting a handle on views[3] and
querysets[4].
>
> On Friday, January 26, 2018 at 3:12:19 PM UTC-5, Melvyn Sopacua wrote:
> > There are a bunch of issues with this code:
> >
> > 1) Spell Physical correctly:
> > > 2 - Phyiscal
> > >
> > > if form.data['handicapped'] is 'Physical' or 'Mental':
> > > handicapped = forms.ChoiceField(choices=[(x, x) for x in ('-------',
> > >
> > > 'Mental', 'Physcal')], required=False)
> >
> > Comparison of non boolean or None values using "is" instead of "==":
> > > if form.data['handicapped'] is 'Physical' or 'Mental':
> > Use of or as if natural language in RHS of comparisons (should be a == x
> > or a
> >
> > == y, not a == x or y):
> > > if form.data['handicapped'] is 'Physical' or 'Mental':
> >
> > > if form['handicapped'].data == 1 or 2:
> > So this reads as if someone with very little knowledge of Python is
> > modifying
> > a 3rd party app, written by someone with a decent amount of Django
> > experience.
> >
> > Finally, when accessing form data from a valid form, we access
> > form.cleaned_data and generally use a local variable to reference the
> > dict:
> >
> > if form.is_valid():
> > data = form.cleaned_data
> > # do stuff with data
--
Melvyn Sopacua
--------
[1] http://book.pythontips.com/en/latest/index.html
[2] https://docs.djangoproject.com/en/2.0/intro/tutorial01/#creating-a-project
[3] https://docs.djangoproject.com/en/2.0/topics/class-based-views/
[4] https://docs.djangoproject.com/en/2.0/topics/db/queries/
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