Ilias Lazaridis wrote:
> within a python script, I like to create a collection which I fill with
> values from an external text-file (user editable).
>
> How is this accomplished the easiest way (if possible without the need
> of libraries which are not part of the standard distribution)?
>
> something like:
>
> text-file:
> {peter, 16},
> {anton, 21}
>
> -
>
> within code:
>
> users.load(text-file.txt)
>
> for user in users
> user.name
> user.age
>
> .
>
"""
What I do for this kind of work is to use a gnumeric spreadsheet
which saves the data in a simple xml format. xml is much less
error-prone than plain text.
Google for, and study 'The gnumeric file format' by David Gilbert.
You need to know how to unzip the file, and how to write a SAX parser.
If you want to use a plain text format, keep it simple. I would
separate the two fields with tab (thus permit a comma within a field)
and allow 'comment' lines that start with a hash.
You don't need the braces, or the end-of-line comma you included.
# snip 'text-file.txt'
# name and age on one line separated by tab
Jonny 8
Mary 87
Moses 449
# end-snip 'text-file.txt'
Then:
"""
import string
class user:
def __init__(self,name,age):
self.name=name
self.age=int(age) # or a float, or a time-interval, or date-of-birth
def show(self):
print "%s is aged %s" % (self.name, self.age)
if __name__=="__main__":
users=[]
filename="text-file.txt"
fieldsep="\t"
F=open(filename,"r")
Lines=F.readlines()
for L0 in Lines:
L1=string.strip(L0)
if not L1.startswith("#"):
Record=string.split(L1,fieldsep)
# insert error handling/validation here
users.append(user(Record[0],Record[1]))
F.close()
for user in users:
user.show()
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