When I run the following code:
array1 = ["happy", "sad","good", "bad","like"]
array2=["i like starhub", "i am happy with the starhub service", "starhub is bad"," this is not awful"]
for i in array1:
for j in array2:
if i in j :
print i
The result printed will be
happy
bad
like
The output is printed according to the order they're listed in array1. How can I sort the output according to array2? I would like the output to be:
like
happy
bad
Switch the loop:
list1 = ["happy", "sad", "good", "bad", "like"]
list2 = ["i like starhub", "i am happy with the starhub service", "starhub is bad", " this is not awful"]
for j in list2:
for i in list1:
if i in j:
print(i)
>>like
>>happy
>>bad
The one on top is what's being used as the primary list. So in your case, list1 was the primary and being sorted as such.
In the one I gave, list2 is the primary instead.
Leb's answer is right on the money; please upvote and accept it.
I just want to add a note about naming conventions.
In many programming languages, variable names i and j are traditionally used for numeric loop indexes, but not for the actual values of the elements in a list or array.
For example (pun intended), if you were writing an old-fashioned for loop in JavaScript, it might look like this:
var names = [ "Kent", "Leb", "Dalen" ];
for( var i = 0; i < names.length; i++ ) {
console.log( names[i] );
}
You could also write code like this in Python, but since you're using the more expressive Python for loop, you can use better names than i and j.
As Dalen notes in a comment, the names array1 and array2 don't match Python terminology—but more importantly, they don't say anything about what is in these lists.
It is helpful to use more self-explanatory variable names throughout. In your code, the two lists are a list of words and a list of phrases, and the variables in the loops represent a single word and a single phrase.
A convention I like here is to use a plural name for a list or array, and the corresponding singular name for an individual element of that list or array.
So you could use names like this:
words = [ "happy", "sad", "good", "bad", "like" ]
phrases = [
"i like starhub",
"i am happy with the starhub service",
"starhub is bad",
" this is not awful"
]
for phrase in phrases:
for word in words:
if word in phrase:
print( word )
Do you see how much more clear this makes the code? Instead of i and j and array1 and array2 (or list1 and list2), each name describes the actual data you're working with.
