Printing a list desending?

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May 3rd, 2008, 09:31 PM

maxhit

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Printing a list desending?

Hello,
I am writing a program somthing like a phonebook and i have a problem.
Im using a list to store the values, its looks somthing like this.
[('641-567-567', 'Bob'), ('656-567-4567', 'joe'), ('567-567-567', 'Billy')]
is it possible to print them going down horizontaly rather than across?
Ex.
('641-567-567', 'Bob')
('656-567-4567', 'joe')
('567-567-567', 'Billy')

When i enter a new number it saves the list in a file, when the program starts it imports the list data.

I tryed a for loop: for entry in phonebook:
print entry
(phonebook being the list)
When i type in new names it works, but the imported ones dont print downwards. Only the new ones.
Thx in advance guys

May 4th, 2008, 03:48 AM

DevCoach

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Your code you posted will work regardless of where the list is coming from.

The fact that it does not work means you are doing something else wrong, but without any code to look at I couldn't say what.

May 4th, 2008, 09:25 AM

bvdet

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I would want my data file to look something like this:

Code:

641-567-5671, Bob
656-567-4567, Joe
567-567-5672, Billy

Read in the data and create a dictionary. The names are the dict keys and the numbers are the values. Iterate on the dictionary for printing.

Python Code:

Original - Python Code
pb_data = open('phone_numbers.txt').read() pb_dict = {} for item in [s for s in pb_data.split('\n') if s]: number, name = item.split(',') pb_dict[name.strip()] = number.strip() for name in pb_dict: print "%s's phone number is %s" % (name, pb_dict[name])

pb_data = open('phone_numbers.txt').read()
 
pb_dict = {}
for item in [s for s in pb_data.split('\n') if s]:
    number, name = item.split(',')
    pb_dict[name.strip()] = number.strip()
 
for name in pb_dict:
    print "%s's phone number is %s" % (name, pb_dict[name])

May 4th, 2008, 01:14 PM

maxhit

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Quote:

Originally Posted by bvdet

I would want my data file to look something like this:

Code:

641-567-5671, Bob
656-567-4567, Joe
567-567-5672, Billy

Read in the data and create a dictionary. The names are the dict keys and the numbers are the values. Iterate on the dictionary for printing.

Python Code:

Original - Python Code
pb_data = open('phone_numbers.txt').read() pb_dict = {} for item in [s for s in pb_data.split('\n') if s]: number, name = item.split(',') pb_dict[name.strip()] = number.strip() for name in pb_dict: print "%s's phone number is %s" % (name, pb_dict[name])

pb_data = open('phone_numbers.txt').read()
 
pb_dict = {}
for item in [s for s in pb_data.split('\n') if s]:
    number, name = item.split(',')
    pb_dict[name.strip()] = number.strip()
 
for name in pb_dict:
    print "%s's phone number is %s" % (name, pb_dict[name])

Thx alot this helped me alot

But i get this error when running

Traceback (most recent call last):
File "C:\Python25\Compile File\PhoneBook.pyw", line 21, in <module>
number, name = item.split(',')
ValueError: need more than 1 value to unpack

I can post the script if needed(I'd rather not)

May 4th, 2008, 01:34 PM

bvdet

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item must be a string of the form:

Code:

'567-567-5672, Billy'

May 4th, 2008, 11:43 PM

maxhit

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Ohh i see
How would i save the file with only that info?
Right now im using pickel to write it.

import pickle
file = open("phone_numbers.dat", "w")
pickle.dump(pb_dict, file)
file.close()

May 5th, 2008, 02:52 AM

SuperOscar

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How about plain and simple:

Python Code:

Original - Python Code
fh = open('phone_numbers.dat', 'w') fh.writelines(['%s\n' % s for s in phonebook]) fh.close()

fh = open('phone_numbers.dat', 'w')
fh.writelines(['%s\n' % s for s in phonebook])
fh.close()

Edit: Forgot that writelines() doesn’t add newlines, you have to do that yourself.

Last edited by SuperOscar : May 5th, 2008 at 02:55 AM.

May 8th, 2008, 05:38 PM

maxhit

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Yea! It worked!
Thank you very much SuperOscar and bvdet.

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