[Tutor] class trouble

[Kalle Svensson]

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[Johannes Graumann]
> I'm just starting this and I'm absolutely clueless why the 3. and 4.
> print statements give me the errors they do. Please help!

> import string
> class porf:
> 	def __init__(self,name,sequence):
> 		self.name = name
> 		self.sequence = string.upper(sequence)
> 	def length(self):
> 		return len(self.sequence)
> 	def stats(self,aa):
> 		aa = string.upper(aa)
> 		return string.count(self.sequence,aa)
> ypr123a = porf('ypr123a','advboaisugvdfklabdfvlysgdvlajhsbfdlasgdclabhcd')
> print ypr123a.name

ypr123a

> print ypr123a.sequence

ADVBOAISUGVDFKLABDFVLYSGDVLAJHSBFDLASGDCLABHCD

> print ypr123a.length

A bit unexpected, maybe.  Methods and functions are objects as any
other in Python, so this just prints the object.

<method porf.length of porf instance at 0x810d79c>

If you add parantheses to invoke the method, this is the result.

>>> print ypr123a.length()
46

> print ypr123a.stats('a')

6

What errors are you experiencing?

Peace,
  Kalle
- -- 
Kalle Svensson, http://www.juckapan.org/~kalle/
Student, root and saint in the Church of Emacs.
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