[Tutor] Tutor Digest, Vol 69, Issue 21 - Change a text string from a list and change it into an integer(WinXP/py2.6.2/Beginner)

[Katt]

First I want to thank the following people for your help: Wayne W., Shashwat 
A., and Alan G.  I appreciate the input/criticism as I continually learn 
more and more.

It seems that I am not sure if I am posting correctly to the right thread 
and am not sure if it has to do with the fact that I am getting the posts in 
a Digest manner.  Let me know if you have any suggestions.

Now back to message at hand:

> Message: 3
> Date: Thu, 5 Nov 2009 21:34:31 -0600
> From: Wayne Werner <waynejwerner at gmail.com>
> To: Katt <the_only_katala at verizon.net>
> Cc: tutor <tutor at python.org>
> Subject: Re: [Tutor] Change a text string from a list and change it
> into an integer number.(WinXP/py2.6.2/Beginner)

>> <snip>
>> Currently the above code does not work unless I change the "if" statement
>> to say:
>> "if check_year == "c".
>>
> It works correctly for me. Try modifying your code:
>
> date = "cyear_11_05"
> date2 = date.split("_")
> check_year = date2[0]
> print check_year
>
> what does that do for you?
> -Wayne

For me it prints to the screen the following : cyear

> Message: 4
> Date: Fri, 6 Nov 2009 09:06:02 +0530
> From: Shashwat Anand <anand.shashwat at gmail.com>
> To: Katt <the_only_katala at verizon.net>
> Cc: tutor <tutor at python.org>
> Subject: Re: [Tutor] Change a text string from a list and change it
> into an integer number.(WinXP/py2.6.2/Beginner)

> What do you want to say exactly ?
> is 'cyear' an integer ?
> let's say date1 = "1984_11_05"

Here cyear is just part of a text string which would be in the following: 
"cyear_11_05"

My goal(which recent I accomplished with the help of Shashwat A.'s function) 
was:
1. Split the string into a list. [cyear,11,5]
2. If date0 == "cyear" then it would replace cyear with the current year 
based on the computer's date.
    Then it would change this information into an integer and return it.
3. If date0 != "cyear" it would then change the number into an integer and 
return the information.

find code that I used below at end of this message.

> Then of course you can change it to an integer using following
> list-comprehension,
>>>> date1 = "1984_11_05"
>>>> date1_list = [int(i) for i in date1.split("_")]
>>>> date1_list
> [1984, 11, 5]
> or alternatively,
>>>> date1_list_alternate=map(int,date1.split("_"))
>>>> date1_list_alternate
> [1984, 11, 5]

I am still learning how to work with list comprehensions so I appreciate the 
multiple examples using the "for" and "map"
choices.

> also your code seems to work on my system.
>> date = "cyear_11_05"
>> date2 = date.split("_")
>> check_year = date2[0]
>> if check_year == "cyear":
>>   year = localtime().tm_year
>> else:
>>   year = int(date2[0])
>> print year

Found that I had not imported localtime from time.  It worked once I 
discovered this little oversight.


> Message: 5
> Date: Fri, 6 Nov 2009 09:27:46 +0530
> From: Shashwat Anand <anand.shashwat at gmail.com>
> To: Katt <the_only_katala at verizon.net>
> Cc: tutor <tutor at python.org>
> Subject: Re: [Tutor] Change a text string from a list and change it
> into an integer number.(WinXP/py2.6.2/Beginner)
>
> import time
>
> def katt(d):
>    date0 = d.split("_")[0]
>    if date0 == "cyear":
>        return int(time.strftime("%Y"))
>    else:
>        return int(date0)
>
> print katt("cyear_11_05")
>print katt("1984_11_05")
>
> http://codepad.org/RBjKmNcA
>
>
> Hope this helps !

Thanks this helps.  I actually changed it a little so that I could include 
it into another function rather than its own seperate function.

My code is as follows:

if year_check == "cyear":
    year = int(strftime("%Y"))
else:
    year = int(year_check)
if month_check == "cmonth":
    month = int(strftime("%m"))
else:
    month = int(month_check)

I of course made sure to include the strftime in my import calls.  I may 
change the int(strftime("%Y")) for localtime().tm_year because I think I 
heard it returns the value as an integer, but will have to experiment.

Thanks again for the inspiration on this section of code.
Thanks again to all.

Katt