Parsing string array for differences

[Ray Slakinski]

My below code doesn't do what I need it to do. What I want is to
capture the differences between two arrays of data into a new list.
So if list A has {Fred, Bob, Jim} and List B has {Jim, George, Fred} I
want to capture in list C just {Fred, Jim}

y = 0
z = 0
data = {}
for element in listB:
x = 0
for element in listA:
if listA[x] != listB[y]:
listC[z] = listB[y]
z = z + 1
x = x +1
y = y + 1

Any and all help would be /greatly/ appreciated!

Ray

 

[Tim Daneliuk]

My below code doesn't do what I need it to do. What I want is to
capture the differences between two arrays of data into a new list.
So if list A has {Fred, Bob, Jim} and List B has {Jim, George, Fred} I
want to capture in list C just {Fred, Jim}

y = 0
z = 0
data = {}
for element in listB:
x = 0
for element in listA:
if listA[x] != listB[y]:
listC[z] = listB[y]
z = z + 1
x = x +1
y = y + 1

Any and all help would be /greatly/ appreciated!

Ray

http://pydoc.org/2.3/sets.html

 

[Josiah Carlson]

My below code doesn't do what I need it to do. What I want is to

capture the differences between two arrays of data into a new list.
So if list A has {Fred, Bob, Jim} and List B has {Jim, George, Fred} I
want to capture in list C just {Fred, Jim}

According to your example just given, you don't want the difference, you
want the similarity.

a = {}
a.fromkeys(listA)
listC_similarity = [i for i in listB if i in a]

Using a dictionary for the lookup makes it faster than searching another
list.

- Josiah

 

[Ray Slakinski]

Yup, someone on IRC introduced me to sets, and I love it

Thanks for the help guys.

Ray