How to do elif statments more elegantly if appending to array in python

Question

I am trying to do a more elegant version of this code. This just basically appends a string to categorynumber depending on the number. Would appreciate any help.

number = [100,150,200,500] 
categoryNumber = []

for i in range (0,len(number)):
    if (number [i] >=1000):
        categoryNumber.append('number > 1000')
    elif (number [i] >=200):
        categoryNumber.append('200 < number < 300')
    elif (number [i] >=100):
        categoryNumber.append('100 < number < 200')
    elif (number [i] >=50):
        categoryNumber.append('50 < number < 100')      
    elif (number [i] < 50):
        categoryNumber.append('number < 50')

for i in range(0,len(categoryNumber)):
    print i

Answer 1

How about:

labels = (
    (1000, 'number >= 1000'),
    (200,  '200 <= number < 1000'),
    (100,  '100 <= number < 200'),
    (50,   '50 <= number < 100'),
    (0,    'number < 50'),
)

for i in number:
    for limit, label in labels:
         if i >= limit:
             categoryNumber.append(label)
             break

Answer 2

how about using bisect?

>>> import bisect
>>> categories = ['number < 50', '50 <= number < 100', '100 <= number < 200', '200 <= number < 300', '300 <= number <1000', 'number >= 1000']
>>> points = [50, 100, 200, 300, 1000]
>>> categories[bisect.bisect(points, 1000)]
'number >= 1000'
>>> categories[bisect.bisect(points, 1)]
'number < 50'
>>> categories[bisect.bisect(points, 50)]
'50 <= number < 100'