paint_formulas is supposed to get the contents of the csv file. (See
http://docs.python.org/library/csv.html) It should be populated by the
line:
paint_formulas = csv.reader(csvfile)
where csv file should be the path to your csv file.
Actually, I think that line should read like this instead:
paint_formulas = csv.reader(open(csvfile)) #was missing the open()
before
Try this as a test of reading the csv file in a controller (should
only show the first few records [0:10] instead of all 14K or whatever
you've got).
def read_csv():
import csv
paint_formulas = csv.reader(open(csvfile))
return dict(paint_formulas = paint_formulas[0:10], count = len
(paint_formulas))
On Jan 9, 1:36 am, Jason Brower <encomp...@gmail.com> wrote:
> It is much more understandable. But it seems that the name
> paint_formulas is not defined. What is supposed to be populated there?
> Best Regards,
> Jason
>
>
>
> On Fri, 2010-01-08 at 20:43 -0800, Brian M wrote:
> > Jason,
> > What's the syntax error?
> > Try this, it's untested but should be verbose enough to get you there.
> > If you have trouble perhaps provide a sample file (few dozen records)
> > that we can test against.
>
> > import csv
> > paint_formulas = csv.reader(csvfile)
> > header = None
>
> > #variable to store the paints we've already put in
> > #database (avoiding duplications and/or having to
> > #constantly query db)
> > paints = dict()
>
> > #variable to store the colorants already put in database
> > known_colorants = dict()
>
> > #these are the indexes that have colorant names
> > #we'll use them to help get all the colorants
> > colorant_indexes = [2,4,6,8,10]
>
> > for formula in paint_formulas:
> > formula_colorants = [] #will hold the colorants in this formula,
> > however many there are
> > if not header:
> > header = formula #give value
> > #and do nothing else cause it's just the column names
> > else:
> > #it's a paint formula
> > name = row[0]
> > base = row[1]
> > #deal with the colorants
> > for c in colorant_indexes:
> > if row[c] <> None:
> > colorant = row[c]
> > amount = row[c+1] #next index is the amount
> > #there's a colorant value to add
> > if colorant in known_colorants:
> > #already have this colorant in the database
> > colorant_id = known_colorants[colorant]#retreive
> > id from our knowns
> > else:
> > #new colorant, add to database
> > known_colorants[colorant]=db.colorant.insert
> > (name=colorant)
> > colorant_id = known_colorants[colorant]
>
> > #now add to this formula's list of colorants
> > formula_colorants.append(dict(id = colorant_id, amount
> > = amount))
> > else:
> > #no more colorants
> > pass
>
> > #add the paint
> > if not name in paints:
> > paints[name]=db.paint.insert(name=name)
>
> > #then add each of the colorants
> > for colorant in formula_colorants:
> > db.paint_colorants.insert(paint_id=paints[name],
> > base_coat = base,
> > colorant_id=colorant[id], units = colorant
> > [amount])
>
> > Good Luck,
> > Brian
>
> > On Jan 8, 7:57 pm, Jason Brower <encomp...@gmail.com> wrote:
> > > I tried the script but couldn't get through the syntax error. Sorry,
> > > lots of commands I don't know there. :/
> > > BR,
> > > Jason
>
> > > On Fri, 2010-01-08 at 09:17 -0800, Brian M wrote:
> > > > I have been working on using web2py to import csv files and find that
> > > > in general it works very well. You will need to be careful with
> > > > pulling in the colorant and amount fields - if you use the
> > > > csv.DictReader() to refer to columns in the CSV file by name instead
> > > > of index you'll find that you only get the value for the *last*
> > > > colorant and amount. In other words, just using row['Colorant'] and row
> > > > ['Amount'] will very likely cause you to loose data - you've got 5
> > > > 'Colorant' entries in a single row, so each one in a row simply over-
> > > > writes the earlier ones. You will most likely need to use the
> > > > indexes, or just rename the column headers in the csv file so they are
> > > > unique.
>
> > > > ~Brian
>
> > > > On Jan 8, 4:51 am, mdipierro <mdipie...@cs.depaul.edu> wrote:
> > > > > Something like this?
>
> > > > > import csv
> > > > > reader = csv.reader(csvfile)
> > > > > header = None
> > > > > paints = {}
> > > > > colorants = {}
> > > > > for line in reader:
> > > > > if not header: header = line
> > > > > else:
> > > > > row = dict([header[i],item) for i,item in enumerate(line)])
> > > > > name = row['Color Name']
> > > > > colorant = row['Colorant']
> > > > > if not name in paints:
> > > > > paints[name]=db.paint.insert(name=name)
> > > > > if not colorant in colorants:
> > > > > colorants[colorant]=db.colorant.insert(name=colorant)
> > > > > db.paint_colorants.insert(paint_id=paints
> > > > > [name],colorant_id=colorants[colorant])
>
> > > > > On Jan 8, 4:10 am, Jason Brower <encomp...@gmail.com> wrote:
>
> > > > > > I have data like this in a csv file....
> > > > > > "Color Name", Base, Colorant, Amount, Colorant, Amount, Colorant,
> > > > > > Amount, Colorant, Amount, Colorant, Amount
> > > > > > "10 PORDRR",G,fo1,76,da1,32,ro1,111,yi1,1,,
> > > > > > It is for a paint database.
> > > > > > Is it at all possible to import that into this model?
> > > > > > Normally I would just take a few minutes and do it by hand. But I
> > > > > > have
> > > > > > 14,000+ entries, so that's out of the question. Any ideas? In
> > > > > > particular, how do you handle the variance in how many kinds of
> > > > > > colorants are added. Notice in this example that is only 4
> > > > > > colorants,
> > > > > > and 5+ could be in the page. (Currently from this extraction, only 5
> > > > > > colorants and their amounts.
>
> > > > > > db = SQLDB('sqlite://paint.sqlite')
>
> > > > > > db.define_table('paint',
> > > > > > Field('name', length=30, requires=IS_NOT_EMPTY(),
> > > > > > unique=True),
> > > > > > Field('base_coat', length=3, requires=IS_NOT_EMPTY()),
> > > > > > Field('hex_color', length=6))
>
> > > > > > db.define_table('colorant',
> > > > > > Field('name', length=3, requires=IS_NOT_EMPTY()))
>
> > > > > > db.define_table('paint_colorants',
> > > > > > Field('paint_id', db.paint),
> > > > > > Field('colorant_id', db.colorant),
> > > > > > Field('units', 'integer'))
>
> > > > > > db.paint_colorants.paint_id.requires=IS_IN_DB(db, 'paint.id',
> > > > > > '%(name)s')
> > > > > > db.paint_colorants.colorant_id.requires=IS_IN_DB(db, 'paint.id',
> > > > > > '%(name)s')
>
> > > > > > Best Regards,
> > > > > > Jason Brower
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