Python integer prefix range algorithm

Question

Here is my problem. I have various integer inputs varying in length, but I only want certain number prefixes to be printed. The prefix ranges are 20000-20150 all five digits. So far I have:

print 20000 <= prefix <= 20150

which is fine, but how do I find or capture the prefix '20000' in the number using Python.

example:20000201501

using the code below won't work, in such cases because there are two instances where the value of prefix is present, I only want the first prefix.

obj = 20000201501
if prefix in obj
    print prefix 

Answer 1

Very simply:

>>> num = 20000201501
>>> print int(str(num)[:5])
20000

So, you need something like this:

def prefix(num):
    return int(str(num)[:5])

print 20000 < prefix(20000201501) < 20150

Answer 2

You can make the object a string (using str), slice the first 5 characters off of it (as the prefix) and then convert that back to an integer (using int):

 prefix = int(str(obj)[:5])