Question1: How type of argument should I use for dict, i.e.,user argument
or list argument.
Read captured traceback:
TypeError
Traceback (most recent call last)
C:\Users\vm\Desktop\apps\docs\Python\assignment_9_4_26.py in <module>()
1 fname = raw_input("Enter file name: ")
2 handle = open (fname, 'r')
----> 3 count = dict.keys()
4 for line in handle:
5 if line.startswith("From: "):
TypeError: descriptor 'keys' of 'dict' object needs an argument
In [99]:
Question2: Are all the loop failures resolved in the revised code?
Revised code is available at
https://gist.github.com/ltc-hotspot/00fa77ca9b40c0a77170
Regards,
Hal
On Thu, Aug 6, 2015 at 4:20 PM, Alan Gauld <alan.ga...@btinternet.com>
wrote:
> On 07/08/15 00:11, Ltc Hotspot wrote:
>
>> Questions(1):Why does print line, prints blank space; and, (2) print
>> address prints a single email address:
>>
>
> See my previous emails.
> You are not storing your addresses so address only holds the last address
> in the file.
> line is at the end of the file so is empty.,
>
> In [72]: print count
>> {'gopal.ramasammyc...@gmail.com <mailto:gopal.ramasammyc...@gmail.com>':
>> 1, 'lo...@media.berkeley.edu <mailto:lo...@media.berkeley.edu>': 3,
>> 'cwen@iupui.
>> edu': 5, 'antra...@caret.cam.ac.uk <mailto:antra...@caret.cam.ac.uk>':
>> 1, 'rjl...@iupui.edu <mailto:rjl...@iupui.edu>': 2, 'gsil...@umich.ed
>> u': 3, 'david.horw...@uct.ac.za <mailto:david.horw...@uct.ac.za>': 4, '
>> wagne...@iupui.edu <mailto:wagne...@iupui.edu>': 1, 'zq...@umich.edu
>> <mailto:zq...@umich.edu>':
>> 4, 'stephen.marqu...@uct.ac.za <mailto:stephen.marqu...@uct.ac.za>': 2,
>> 'r...@media.berkeley.edu <mailto:r...@media.berkeley.edu>': 1}
>>
>> Question(3): why did the elements print count('keys') and print
>> count('items') fail?
>>
>
> Because, as shown above, count is a dictionary.
> So items and keys are methods not strings to be passed
> to a non-existent count() function.
>
> So you need, for example:
>
> print count.keys()
>
> Traceback (most recent call last)
>> <ipython-input-76-35c8707b256e> in <module>()
>> ----> 1 print count('items')
>>
>> TypeError: 'dict' object is not callable
>>
>>
> Which is what the error is also telling you.
> You cannot call - ie use () - with a dictionary like count.
>
>
> --
> Alan G
> Author of the Learn to Program web site
> http://www.alan-g.me.uk/
> http://www.amazon.com/author/alan_gauld
> Follow my photo-blog on Flickr at:
> http://www.flickr.com/photos/alangauldphotos
>
>
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