syntax highlighting

[snippsat]

Testing out shcode,it's ok first code i paste.
If i try to past in the same code one more time the original code block activates and make some html?
I get some times some strange errors in last line of some code.

[shcode=python]from collections import deque
from itertools import islice

def window(iterable, size=2):
   iterable = iter(iterable)
   d = deque(islice(iterable, size), size)
   yield d
   for x in iterable:
       d.append(x)
       yield d[/shcode]

Here is [_shcode=python]
[shcode=python]

from collections import deque
from itertools import islice

def window(iterable, size=2):
    iterable = iter(iterable)
    d = deque(islice(iterable, size), size)
    yield d
    for x in iterable:
        d.append(x)
        yield d

[/shcode]

Here is [_shcode=python]
[shcode=python]

with open('numb.txt') as f_obj:
    number = int(f_obj.read())
    if number > 10000:
        number = number - 100
        print(number)
    else:
        print(number)

[/shcode]


Here i just paste in code,and code block auto hit in.

with open('numb.txt') as f_obj:
    number = int(f_obj.read())
    if number > 10000:
        number = number - 100
        print(number)
    else:
        print(number)