NameError question - def(self,master) - master not in namespace within class?
Hi I am new to writing module and object oriented python code. I am trying to understand namespaces and classes in python. I have the following test case given in three files runner , master and child. I am getting an error within child where in one line it understands variable master.name and in the next line it gives a NameError as given here print Reset name now from %s to %s , oldname %s is saved in mastertrash % (master.trash, master.name , master.trash) NameError: name 'master' is not defined Sorry for a long post because I dont know how to frame my question. I am pasting the code contained in the three files and the error message here Thanks for your help harijay The detailed error I get is hazel:tmp hari$ python runner.py Traceback (most recent call last): File runner.py, line 3, in module import child File /Users/hari/rpc-ccp4/tmp/child.py, line 1, in module class child(): File /Users/hari/rpc-ccp4/tmp/child.py, line 9, in child print Reset name now from %s to %s , oldname %s is saved in mastertrash % (master.trash, master.name , master.trash) NameError: name 'master' is not defined #File runner.py #!/usr/bin/python import master import child if __name__==__main__: print RUNNING RUNNER m = master.master(hj,oldhj) s = child.child(m) print Now I have the variable master name %s and master.trash %s % (m.name , m.trash) #File master.py class master(): name= trash= def __init__(self,name,trash): self.name = name self.trash = trash #File child.py class child(): def __init__(self,master): print Master name is %s % master.name print Now seeting master name to setnameinchild in child.py tmp = master.trash master.trash = master.name master.name = setnameinchild print Reset name now from %s to %s , oldname %s is saved in mastertrash % (master.trash, master.name , master.trash) -- http://mail.python.org/mailman/listinfo/python-list
Re: NameError question - def(self, master) - master not in namespace within class?
On 9 Ott, 17:43, harijay [EMAIL PROTECTED] wrote: Hi I am new to writing module and object oriented python code. I am trying to understand namespaces and classes in python. I have the following test case given in three files runner , master and child. I am getting an error within child where in one line it understands variable master.name and in the next line it gives a NameError as given here print Reset name now from %s to %s , oldname %s is saved in mastertrash % (master.trash, master.name , master.trash) NameError: name 'master' is not defined Sorry for a long post because I dont know how to frame my question. I am pasting the code contained in the three files and the error message here Thanks for your help harijay The detailed error I get is hazel:tmp hari$ python runner.py Traceback (most recent call last): File runner.py, line 3, in module import child File /Users/hari/rpc-ccp4/tmp/child.py, line 1, in module class child(): File /Users/hari/rpc-ccp4/tmp/child.py, line 9, in child print Reset name now from %s to %s , oldname %s is saved in mastertrash % (master.trash, master.name , master.trash) NameError: name 'master' is not defined #File runner.py #!/usr/bin/python import master import child if __name__==__main__: print RUNNING RUNNER m = master.master(hj,oldhj) s = child.child(m) print Now I have the variable master name %s and master.trash %s % (m.name , m.trash) #File master.py class master(): name= trash= def __init__(self,name,trash): self.name = name self.trash = trash #File child.py class child(): def __init__(self,master): print Master name is %s % master.name print Now seeting master name to setnameinchild in child.py tmp = master.trash master.trash = master.name master.name = setnameinchild print Reset name now from %s to %s , oldname %s is saved in mastertrash % (master.trash, master.name , master.trash) You need to have an import master in child.py too. Ciao - FB Ciao FB -- http://mail.python.org/mailman/listinfo/python-list
Re: NameError question - def(self, master) - master not in namespace within class?
On Thu, Oct 9, 2008 at 11:43 AM, harijay [EMAIL PROTECTED] wrote: Hi I am new to writing module and object oriented python code. I am trying to understand namespaces and classes in python. I have the following test case given in three files runner , master and child. I am getting an error within child where in one line it understands variable master.name and in the next line it gives a NameError as given here snip #File child.py class child(): def __init__(self,master): print Master name is %s % master.name print Now seeting master name to setnameinchild in child.py tmp = master.trash master.trash = master.name master.name = setnameinchild print Reset name now from %s to %s , oldname %s is saved in mastertrash % (master.trash, master.name , master.trash) The last line (starting with print), is not indented to the correct level. Assuming it's supposed to be part of the child class's __init__ method, it needs to line up with the rest of that method. -- Jerry -- http://mail.python.org/mailman/listinfo/python-list
Re: NameError question - def(self, master) - master not in namespace within class?
Thanks beiff for your prompt reply - But I shouldnt need to import master in child. Actually and very strangely. The problem fixed itself without any change to my code. I dont understand how. It may have been a problem with a bad *.pyc lingering around . But now I cannot get the old NameError to repeat itself..its very weird Here is the new code and it runs just fine ..I am absolutely confused as to why it failed several times in a row and then fixed itself. Here is the new code just to convince myself that there is absolutely no change; #File runner.py #!/usr/bin/python import master import child if __name__==__main__: print RUNNING RUNNER m = master.master(hj,oldhj) s = child.child(m) print Now I have the variable master name %s and master.trash %s % (m.name , m.trash) #File child.py class child(): def __init__(self,master): print Master name is %s % master.name print Now seeting master name to setnameinchild in child.py tmp = master.trash master.trash = master.name master.name = setnameinchild print Reset name now from %s to %s , oldname %s is saved in mastertrash % (master.trash, master.name , master.trash) #File master.py class master(): name= trash= def __init__(self,name,trash): self.name = name self.trash = trash Produces the output: hazel:tmp hari$ python runner.py RUNNING RUNNER Master name is hj Now seeting master name to setnameinchild in child.py Reset name now from hj to setnameinchild , oldname hj is saved in mastertrash Now I have the variable master name setnameinchild and master.trash hj On Oct 9, 11:54 am, [EMAIL PROTECTED] wrote: On 9 Ott, 17:43, harijay [EMAIL PROTECTED] wrote: Hi I am new to writing module and object oriented python code. I am trying to understand namespaces and classes in python. I have the following test case given in three files runner , master and child. I am getting an error within child where in one line it understands variable master.name and in the next line it gives a NameError as given here print Reset name now from %s to %s , oldname %s is saved in mastertrash % (master.trash, master.name , master.trash) NameError: name 'master' is not defined Sorry for a long post because I dont know how to frame my question. I am pasting the code contained in the three files and the error message here Thanks for your help harijay The detailed error I get is hazel:tmp hari$ python runner.py Traceback (most recent call last): File runner.py, line 3, in module import child File /Users/hari/rpc-ccp4/tmp/child.py, line 1, in module class child(): File /Users/hari/rpc-ccp4/tmp/child.py, line 9, in child print Reset name now from %s to %s , oldname %s is saved in mastertrash % (master.trash, master.name , master.trash) NameError: name 'master' is not defined #File runner.py #!/usr/bin/python import master import child if __name__==__main__: print RUNNING RUNNER m = master.master(hj,oldhj) s = child.child(m) print Now I have the variable master name %s and master.trash %s % (m.name , m.trash) #File master.py class master(): name= trash= def __init__(self,name,trash): self.name = name self.trash = trash #File child.py class child(): def __init__(self,master): print Master name is %s % master.name print Now seeting master name to setnameinchild in child.py tmp = master.trash master.trash = master.name master.name = setnameinchild print Reset name now from %s to %s , oldname %s is saved in mastertrash % (master.trash, master.name , master.trash) You need to have an import master in child.py too. Ciao - FB Ciao FB -- http://mail.python.org/mailman/listinfo/python-list
Re: NameError question - def(self, master) - master not in namespace within class?
Thanks Jerry and beiff , Jerry was right, it was an indent problem . Between using my text editor and running from commandline something went out of sync and I didnt catch it probably. I can now reproduce the error with a bad ident . These are my first posts to comp.lang.python..and I am very grateful to everyone for their time . harijay On Oct 9, 12:07 pm, Jerry Hill [EMAIL PROTECTED] wrote: On Thu, Oct 9, 2008 at 11:43 AM, harijay [EMAIL PROTECTED] wrote: Hi I am new to writing module and object oriented python code. I am trying to understand namespaces and classes in python. I have the following test case given in three files runner , master and child. I am getting an error within child where in one line it understands variable master.name and in the next line it gives a NameError as given here snip #File child.py class child(): def __init__(self,master): print Master name is %s % master.name print Now seeting master name to setnameinchild in child.py tmp = master.trash master.trash = master.name master.name = setnameinchild print Reset name now from %s to %s , oldname %s is saved in mastertrash % (master.trash, master.name , master.trash) The last line (starting with print), is not indented to the correct level. Assuming it's supposed to be part of the child class's __init__ method, it needs to line up with the rest of that method. -- Jerry -- http://mail.python.org/mailman/listinfo/python-list
Re: NameError question - def(self,master) - master not in namespace within class?
[EMAIL PROTECTED] a écrit : OT bieffe, please, learn to snip irrelevant material... /OT On 9 Ott, 17:43, harijay [EMAIL PROTECTED] wrote: (snip) NameError: name 'master' is not defined (snip) #File runner.py #!/usr/bin/python import master import child if __name__==__main__: print RUNNING RUNNER m = master.master(hj,oldhj) s = child.child(m) (snip) #File child.py class child(): def __init__(self,master): print Master name is %s % master.name print Now seeting master name to setnameinchild in child.py tmp = master.trash master.trash = master.name master.name = setnameinchild (snip) You need to have an import master in child.py too. Nope. The 'child' class is passed a 'master' instance when instanciated. You got confused by the bad naming. OP The convention in Python is to name classes in CamelCase. Your classes should be named 'Master' and 'Child'. /OP -- http://mail.python.org/mailman/listinfo/python-list
