using iteritems() with dictionary

jone kim · 05-03-2012, 07:14 AM

I've got strange error with iteritems(). why is it so?

Code:

>>> class test:
	def __init__(self,**marks):
		self._marks = marks
	def getMarks(self):
		for key,value in self._marks.iteritems():
			print (self._marks(key,value))

			
>>> t1=test(sub1=99,sub2=98)
>>> t1.getMarks()
Traceback (most recent call last):
  File "<pyshell#12>", line 1, in <module>
    t1.getMarks()
  File "<pyshell#10>", line 5, in getMarks
    for key,value in self._marks.iteritems():
AttributeError: 'dict' object has no attribute 'iteritems'

but when i did items(), it works well

Code:

__dict = {'sub1':99,'sub2':98}

>>> for key,val in __dict.items():
	print(key,val)

	
sub2 98
sub1 99

Also i need to print the result in the same order as in the input i.e.
sub1 99
sub2 98.
how can I do it?

jone kim · 05-03-2012, 07:17 AM

Quote:

Originally Posted by jone kim

I've got strange error with iteritems(). why is it so?

Code:

>>> class test:
	def __init__(self,**marks):
		self._marks = marks
	def getMarks(self):
		for key,value in self._marks.iteritems():
			print (self._marks(key,value))

			
>>> t1=test(sub1=99,sub2=98)
>>> t1.getMarks()
Traceback (most recent call last):
  File "<pyshell#12>", line 1, in <module>
    t1.getMarks()
  File "<pyshell#10>", line 5, in getMarks
    for key,value in self._marks.iteritems():
AttributeError: 'dict' object has no attribute 'iteritems'

but when i did items(), it works well

Code:

__dict = {'sub1':99,'sub2':98}

>>> for key,val in __dict.items():
	print(key,val)

	
sub2 98
sub1 99

Also i need to print the result in the same order as in the input i.e.
sub1 99 and after that
sub2 98.
how can I do it?

audriusk · 05-06-2012, 01:47 PM

Which Python version is that? In Python 3 dict object only has .items() method which returns a so called view object.

Quote:

Originally Posted by jone kim

Also i need to print the result in the same order as in the input i.e.
sub1 99
sub2 98.
how can I do it?

OrderedDict from collections module will help you here.