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pythonarrayslistinttypeerror

boolean not supported between instances of 'int' and 'list' .. despite having a clean array?

I have an array of size 10000, which contains random integers in it between 1-200 made using the following code: 

x = np.random.randint(1,201, size=10000)

Next, I'm taking a random sample of 100, from this array and finding its mean value and putting it in an array called meen:

meen = []
for z in range(0, 50000):    
    randomSample=random.sample(list(x), 100 )
    meanOfSample=np.mean(randomSample)  
    meen.append(meanOfSample)

I assume the past two codes work correctly because when I print(meen) I get an array:

[102.89, 106.14, 104.73, 97.78, 101.94, 98.94, 97.43, 98.92, 101.84, 99.64......] fifty thousand long.

Now, the issue is when I am trying to find the number of values that fall within a range. For example, If I say I want to find the amount of numbers in meen that fall between 95 and 100 I tried the code: 

((95 <= meen) & (meen <= 100)).sum()

But I get the error: "TypeError: '<=' not supported between instances of 'int' and 'list'"

I've seen various similar problems with this error on this website, but they all involved having bad arrays. I think my array is fine..? It only has numbers, no strings, or anything else that should cause issues.

Solution

  • meen is a list, not a numpy array. Try adding this after your loop:

    meen = np.asarray(meen)