filter is Python

[Wiebke Pätzold]

Hi all!

I have to work with MetaKit. My job is it to filter. For example: If I
search for the initial letter "P", the programm should all results
print with this characteristic.
Couls somebody help me with this task?

Wiebke

[Brian Kelley]

Wiebke Pätzold wrote:

Hi all!

I have to work with MetaKit. My job is it to filter. For example: If I
search for the initial letter "P", the programm should all results
print with this characteristic.
Couls somebody help me with this task?

Wiebke

The metakit list is probably the place for this. See equi4.com for
instructions. That being said:
I assume you are filtering a table/view looking at some column. Let's
say the table is "foo" and the column is "bar".

def myfilter(row):
return row.bar[0] == "P"

# return the matching indices
indices = view.filter(myfilter)
# return a new view with only the matching rows
newview = view.remapwith(indices)

Here is a full example:
import metakit

storage = metakit.storage()
vw = storage.getas("test[bar:S]")

data = """My dog has fleas but he is a very good Pooch.
Sometimes he likes to Play""".split()

for d in data:
vw.append((d,))

def myfilter(row):
return row.bar[0] == "P"

indices = vw.filter(myfilter)
metakit.dump(indices)

newvw = vw.remapwith(indices)
metakit.dump(newvw)