Help me!!

[Rohan]

I have the following piece of code

a = len(ab_file)
b= 0
while(b<a):
c= 0
d = len(cd_files)
while(c<d):
if cd_files[c] == ab_file[b]:
files.append(ab_file[b].upper())
else:
files.append(ab_file[b])
c = c + 1

b = b +1

print files

I'm trying to compare the list with another list and if it is there in
both I'm changing it to upper case and adding to another list and if
its not there in both I just want to add it to the global list (ie
files).
I'm able to do the first part but when I'm doing the second part the
files which are not there in both are getting repeatedly into the
global file. Some one help me so that
If ab = [a,b,c,d]
and cd = [a,c]
my global list file should be [A,b,C,d]

[beginner]

Some one help me so that

If ab = [a,b,c,d]
and cd = [a,c]
my global list file should be [A,b,C,d]

If there is a lot of entries in the list, I would consider using an
indexed data structure such as dict.

>>ab=['a','b','c','d']
cd=['a','c']
common=[x.upper() for x in ab if x in cd]
ab_minus_cd=[x for x in ab if x not in cd]
cd_minus_ab=[x for x in ab if x not in cd]
requested_list = common+ab_minus_cd+cd_minus_ab

[beginner]

On Aug 16, 2:26 pm, beginner <[e-mail]:

Some one help me so that
If ab = [a,b,c,d]
and cd = [a,c]
my global list file should be [A,b,C,d]

If there is a lot of entries in the list, I would consider using an
indexed data structure such as dict.
ab=['a','b','c','d']
cd=['a','c']
common=[x.upper() for x in ab if x in cd]
ab_minus_cd=[x for x in ab if x not in cd]
cd_minus_ab=[x for x in ab if x not in cd]
requested_list = common+ab_minus_cd+cd_minus_ab- Hide quoted text -

[Gerardo Herzig]

Anhoter HURRA for list comprehensions:

>>a = ['a', 'b', 'c', 'd']
b = ['a','c']
[x in b and x.upper() or x for x in a]

['A', 'b', 'C', 'd']

Is what you want?
Cheers

Gerardo

>I'm trying to compare the list with another list and if it is there in
both I'm changing it to upper case and adding to another list and if
its not there in both I just want to add it to the global list (ie
files).
I'm able to do the first part but when I'm doing the second part the
files which are not there in both are getting repeatedly into the
global file. Some one help me so that
If ab = [a,b,c,d]
and cd = [a,c]
my global list file should be [A,b,C,d]