Help with dictionaries and lists!

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October 8th, 2012, 05:14 PM

mopukel

Registered User

Join Date: Oct 2012

Location: Bremen

Posts: 1

Time spent in forums: 17 m 15 sec
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Help with dictionaries and lists!

Hello! This is my third week in Python and my knowledge is still close to 0! Not to mention, I get confused with C so, so much!

I need some help with the following task:

Write a function readEntry that takes a string of the form NAME:AGE and returns a dictionary of
the form "name":NAME, "age": AGE where NAME is a string and AGE is an integer.

So far I got this:

Code:

def readEntry(s): 
               info = {}  
               info["name"] = name 
               info ["age"] = age  
               return info  
               s.split([':']) 
         if s <= ':':   
              return str(name) 
         else s => ':':   
              return int(age);

I was actually going to go for a 'for ' loop but thanks to my confusing instructor I'm stuck with using an unfamiliar function 's.split' so...
I'm stuck!

And wait! It has a continuation!

Write a function readEntryList that takes a string (a file name), reads that file, and interprets
every line in the file as a age entries (by calling readEntry). The function should return a list of
entries in the same order as in the file.

October 8th, 2012, 06:59 PM

b49P23TIvg

Contributing User

Join Date: Aug 2011

Posts: 3,389

Time spent in forums: 1 Month 2 Weeks 3 Days 14 h 22 m 25 sec
Reputation Power: 383

Ease up, you'll get it. python's not so hard. I've stuck in a useful debugging statement to help you understand. Object data type is quite important---display it. Also, the documentation is extensive. You can command, to the python interpreter,

>>> help(list) # for example
or
>>> dir(some_object) # to find its methods.

Code:

def readEntry(s): 
    fields = s.split(':')

    print('debug>',type(fields),'fields holds:',fields)

    info = {}  
    info["name"] = fields[0]
    info["age"] = int(fields[1])
    return info

def readEntryList(filename):
    with open(filename,'r') as input_stream:
        result = [readEntry(line) for line in input_stream]
    return result

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