[Tutor] retrieving instances value

[alan.gauld@bt.com]

> class Transaction:
> 	def __init__(self,name='',address='',age=''):
> 		self._name = name
> 		self._address = address
> 		self._age = age
> 
> # make a Transaction instance
> obj = Transaction('my name', 'my address', 25)
> 
> how can i retrieve each 'obj' instance value without typing it one by
> one manually (in case it have 100 instances)?

Store the instances in a list or dictionary.
Probably a dictionary keyed by name, or maybe even by 
the tuple of value.

So:

XnList = []
XnDict = {}
while 1:
  name = raw_input("NAME? ")
  addr = raw_input("ADDRESS? ")
  ag = raw_input("AGE? ")
  obj = Transaction(name,addr,age)
  XnDict[n] = obj
  # OR ... XnDict[(name,addr,age)] = obj
  # OR ... XnList.append(obj)

And access them with:

for x in XnDict.keys(): print XnDict[x].name

OR

for x in XnList: print x.name


HTH,

Alan g.
Author of the 'Learning to Program' web site
http://www.freenetpages.co.uk/hp/alan.gauld