A newbie question about some code
Hi everyone.
I am reading a python library code and found something i can not understand.
Please help!
class Envelope(object):
def __init__(self,ta_info):
self.ta_info = ta_info
def writefilelist(self,ta_list,tofile):
for filename in ta_list:
fromfile = botslib.botsopendata(filename,
'rb',self.ta_info['charset'])
shutil.copyfileobj(fromfile,tofile)
fromfile.close()
def convertfilelist(self,ta_list):
return [botslib.botsgetabspathdata(filename) for filename in
ta_list]
class myxmlenvelop(Envelope):
def __init__(self,ta_info,ta_list):
''' class for (test) xml envelope. There is no standardised
XML-envelope!
writes a new XML-tree; uses places-holders for XML-files to
include; real enveloping is done by ElementTree's include'''
self.ta_info = ta_info
self._openoutenvelope()
#~ self.out.put({'BOTSID':'root','xmlns:xi':"
http://www.w3.org/2001/XInclude"}) #works, but attribute is not removed
bij ETI.include
self.out.put({'BOTSID':'root'})
ta_list = self.convertfilelist(ta_list)
for filename in ta_list:
self.out.put({'BOTSID':'root'},{'BOTSID':'{
http://www.w3.org/2001/XInclude}include','parse':"xml",'href':filename})
self.out.envelopewrite(self.out.root
Please check the blue highlighted part, I don't understand how the object
get the property?
Jim
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Re: A newbie question about some code
On Mon, May 18, 2009 at 5:30 PM, Rhodri James wrote: > On Mon, 18 May 2009 10:18:52 +0100, Jim Qiu > wrote: > > Please check the blue highlighted part, I don't understand how the object >> get the property? >> > > Colours and highlighting don't come across in Usenet postings. Could > you be a bit more specific. Which object, and what property? > > -- > Rhodri James *-* Wildebeeste Herder to the Masses > -- > http://mail.python.org/mailman/listinfo/python-list It's the out property. and I realized my mistake after reading Chris Rebert's Message. Thanks. Jim -- http://mail.python.org/mailman/listinfo/python-list
Yet another question about class property.
Hi everyone,
Following is the code i am reading, i don't see anywhere the declaration of
Message.root object,
Where is it from?
#bots-modules
import bots.botslib as botslib
import bots.node as node
from bots.botsconfig import *
class Message(object):
''' abstract class; represents a edi message.
is subclassed as outmessage or inmessage object.
'''
def __init__(self):
self.recordnumber=0#segment counter. Is not used for
UNT of SE record; some editypes want sequential recordnumbering
@staticmethod
def display(records):
'''for debugging lexed records.'''
for record in records:
t = 0
for veld in record:
if t==0:
print '%s(Record-id)'%(veld[VALUE])
else:
if veld[SFIELD]:
print '%s(sub)'%(veld[VALUE])
else:
print '%s(veld)'%(veld[VALUE])
t += 1
def get(self,*mpaths):
''' query tree (self.root) with mpath; get value (string); get None
if not found.'''
if self.root.record is None:
raise botslib.MpathRootError('get("%s"): "root" of incoming
message is empty; either split messages or use inn.getloop'%(str(mpaths)))
return self.root.get(*mpaths)
def getnozero(self,*mpaths):
''' like get, returns None is value is zero (0) or not numeric.
Is sometimes usefull in mapping.'''
if self.root.record is None:
raise botslib.MpathRootError('get("%s"): "root" of incoming
message is empty; either split messages or use inn.getloop'%(str(mpaths)))
return self.root.getnozero(*mpaths)
def getindicator(self,ind,*mpaths):
''' like get, returns None is value is zero (0) or not numeric.
Is sometimes usefull in mapping.'''
if self.root.record is None:
raise botslib.MpathRootError('get("%s"): "root" of incoming
message is empty; either split messages or use inn.getloop'%(str(mpaths)))
return self.root.getindicator(ind,*mpaths)
def getcount(self):
''' count number of nodes in self.root. Number of nodes is number of
records.'''
return self.root.getcount()
def getcountoccurrences(self,*mpaths):
''' count number of nodes in self.root. Number of nodes is number of
records.'''
count = 0
for value in self.getloop(*mpaths):
count += 1
return count
def getcountsum(self,*mpaths):
''' return the sum for all values found in mpath. Eg total number of
ordered quantities.'''
if self.root.record is None:
raise botslib.MpathRootError('get("%s"): "root" of incoming
message is empty; either split messages or use inn.getloop'%(str(mpaths)))
return self.root.getcountsum(*mpaths)
def getloop(self,*mpaths):
''' query tree with mpath; generates all the nodes. Is typically
used as: for record in inn.get(mpath):
'''
if self.root.record:#self.root is a real root
for terug in self.root.getloop(*mpaths): #search recursive for
rest of mpaths
yield terug
else: #self.root is dummy root
for childnode in self.root.children:
for terug in childnode.getloop(*mpaths): #search recursive
for rest of mpaths
yield terug
def put(self,*mpaths):
if self.root.record is None and self.root.children:
raise botslib.MpathRootError('put("%s"): "root" of outgoing
message is empty; use out.putloop'%(str(mpaths)))
return self.root.put(*mpaths)
def putloop(self,*mpaths):
if not self.root.record:#no input yet, and start with a
putloop(): dummy root
if len(mpaths) == 1:
self.root.append(node.Node(mpaths[0]))
return self.root.children[-1]
else: #TODO: what if self.root.record is None and len(mpaths) >
1?
raise botslib.MpathRootError('putloop("%s"): mpath too
long???'%(str(mpaths)))
return self.root.putloop(*mpaths)
def sort(self,*mpaths):
if self.root.record is None:
raise botslib.MpathRootError('get("%s"): "root" of message is
empty; either split messages or use inn.getloop'%(str(mpaths)))
self.root.sort(*mpaths)
def normalisetree(self,node):
''' The node tree is check, sorted, fields are formated etc.
Always use this method before writing output.
'''
#~ node.display()
#~ print 'normalisetree'
self._checktree(node,self.defmessage.structure[0])
self._canonicaltree(node,self.defmessage.structure[0])
def _checktree(self,tree,structure):
''' checks tree with table:
- all records should be in table at the right place in
hierarchy
- for each record, all fields should be in grammar
This
Re: Yet another question about class property.
Thanks for you patience, Dave.
Obviously i have not got used to the python philosophy.
Following you guide, i implemented the following code, and you are
absolutely right.
#!/usr/bin/python
#coding:utf-8
class Parent(object):
def __init__(self):
pass
def displayAttrOfSubClass(self):
print self.attrFromChild
class Child(Parent):
def __init__(self):
self.attrFromChild = 'Hi, Everyone, Java does this support this trick!'
childObj = Child()
childObj.displayAttrOfSubClass()
Python can use in the parent class a variable only instantiated by a
sub-class, is this a point of advance of technique of Python?
Jim
On Wed, May 20, 2009 at 6:00 PM, Dave Angel wrote:
> Jim Qiu wrote:
>
>> Hi everyone,
>>
>> Following is the code i am reading, i don't see anywhere the declaration
>> of
>> Message.root object,
>> Where is it from?
>>
>> #bots-modules
>> import bots.botslib as botslib
>> import bots.node as node
>> from bots.botsconfig import *
>>
>>
>> class Message(object):
>>''' abstract class; represents a edi message.
>>is subclassed as outmessage or inmessage object.
>>'''
>>def __init__(self):
>>self.recordnumber=0#segment counter. Is not used
>> for
>> UNT of SE record; some editypes want sequential recordnumbering
>>
>>@staticmethod
>>def display(records):
>>'''for debugging lexed records.'''
>>for record in records:
>>t = 0
>>for veld in record:
>>if t==0:
>>print '%s(Record-id)'%(veld[VALUE])
>>else:
>>if veld[SFIELD]:
>>print '%s(sub)'%(veld[VALUE])
>>else:
>>print '%s(veld)'%(veld[VALUE])
>>t += 1
>>
>>def get(self,*mpaths):
>>''' query tree (self.root) with mpath; get value (string); get None
>> if not found.'''
>>if self.root.record is None:
>>raise botslib.MpathRootError('get("%s"): "root" of incoming
>> message is empty; either split messages or use inn.getloop'%(str(mpaths)))
>>return self.root.get(*mpaths)
>>
>>def getnozero(self,*mpaths):
>>''' like get, returns None is value is zero (0) or not numeric.
>>Is sometimes usefull in mapping.'''
>>if self.root.record is None:
>>raise botslib.MpathRootError('get("%s"): "root" of incoming
>> message is empty; either split messages or use inn.getloop'%(str(mpaths)))
>>return self.root.getnozero(*mpaths)
>>
>>def getindicator(self,ind,*mpaths):
>>''' like get, returns None is value is zero (0) or not numeric.
>>Is sometimes usefull in mapping.'''
>>if self.root.record is None:
>>raise botslib.MpathRootError('get("%s"): "root" of incoming
>> message is empty; either split messages or use inn.getloop'%(str(mpaths)))
>>return self.root.getindicator(ind,*mpaths)
>>
>>def getcount(self):
>>''' count number of nodes in self.root. Number of nodes is number
>> of
>> records.'''
>>return self.root.getcount()
>>
>>def getcountoccurrences(self,*mpaths):
>>''' count number of nodes in self.root. Number of nodes is number
>> of
>> records.'''
>>count = 0
>>for value in self.getloop(*mpaths):
>>count += 1
>>return count
>>
>>def getcountsum(self,*mpaths):
>>''' return the sum for all values found in mpath. Eg total number
>> of
>> ordered quantities.'''
>>if self.root.record is None:
>>raise botslib.MpathRootError('get("%s"): "root" of incoming
>> message is empty; either split messages or use inn.getloop'%(str(mpaths)))
>>return self.root.getcountsum(*mpaths)
>>
>>def getloop(self,*mpaths):
>>''' query tree with mpath; generates all the nodes. Is typically
>> used as: for record in inn.get(mpath):
>>'''
>>if self.root.record:#self.root
Invitation to connect on LinkedIn
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source install of python2.7 and rpm install of cx_Oracle collision
Hi all, I make installed python 2.7 from source, and also installed the RPM version of cx_Oracle for python 2.7. But ldd tells me : #ldd cx_Oracle.so libpython2.7.so.1.0 => not found I find out that only libpython2.7.a generated when I install python2.7, who can tell me what I need to do ? I want a libpython2.7.so.1.0 generated when I install python. I am not familiar with GCC and .so .a stuff. Best regards, Jim -- http://mail.python.org/mailman/listinfo/python-list
How to output a complex List object to a file.
Hi all,
I have a object list list this:
from bots.botsconfig import *
from D96Arecords import recorddefs
from edifactsyntax3 import syntax
structure=[
{ID:'UNH',MIN:1,MAX:1,LEVEL:[
{ID:'BGM',MIN:1,MAX:1},
{ID:'DTM',MIN:1,MAX:5},
{ID:'NAD',MIN:1,MAX:5,LEVEL:[
{ID:'CTA',MIN:0,MAX:5,LEVEL:[
{ID:'COM',MIN:0,MAX:5},
]},
]},
{ID:'RFF',MIN:0,MAX:5,LEVEL:[
{ID:'DTM',MIN:0,MAX:5},
]},
{ID:'CUX',MIN:0,MAX:5,LEVEL:[
{ID:'DTM',MIN:0,MAX:5},
]},
{ID:'LOC',MIN:1,MAX:20,LEVEL:[
{ID:'DTM',MIN:0,MAX:5},
{ID:'LIN',MIN:0,MAX:20,LEVEL:[
{ID:'PIA',MIN:0,MAX:5},
{ID:'IMD',MIN:0,MAX:5},
{ID:'RFF',MIN:0,MAX:5},
{ID:'ALI',MIN:0,MAX:5},
{ID:'MOA',MIN:0,MAX:5},
{ID:'PRI',MIN:0,MAX:5},
{ID:'QTY',MIN:0,MAX:999,LEVEL:[
{ID:'NAD',MIN:0,MAX:1},
]},
]},
]},
{ID:'UNT',MIN:1,MAX:1},
]
}
]
I need to output this "structure" object into a file, how to do that ?
Jim
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