• Go to the question and press Reply ...
• Select the Advanced editor if needed (or ...),  then select

If you can't see it, you didn't select it

 More...Syntax highlighter ,

Your code can now be pasted in and highlighted with the language of your choice .........

Your code should be highlighted something like this ............

--- Python -----------------------------

import numpy as np
a = np.arange(5)
print("Sample results:... {}".format(a))

--------------------------------------------

Now the above example gives you the language syntax highlighting that you are familiar with..

Alternatives include just using the HTML/XML option

-----HTML/XML ---------------------

# just use the HTML/XML option.. syntax colors will be removed
import numpy as np
a = np.arange(5)
print("simple format style {}".format(a))
simple format style [0 1 2 3 4]

--------------------------------------------

NOTE:   you can only edit code within this box and not from outside!

HTML editing tips:....

• You can get into the html editor for fine-tuning, but it can get ugly for the uninitiated.
• Comments get deleted ... this not a full editor under your control
• If you have lots of text to enter, do it first then enter and format code
• If editing refresh is slow, use the HTML editor or you will have retired before it completes.

• The editor seems to edit each character as you type and it gets painfully slower as the post gets bigger.
• You can improve comments and code output by using tables like this and in the example below.

>>> import numpy as np
>>> a = np.arange(5)
>>> print("Sample results:... {}".format(a))
>>> # really long comment 30 |------40 | -----50 | -----60 | -----70 | ---- 80|

Sample results:... [0 1 2 3 4]
>>> # really long comment 30 |------40 | -----50 | -----60 | -----70 | ---- 80|

Before code tip:  try to keep your line length <70 characters

# -*- coding: UTF-8 -*-
"""
:Script:   demo.py
:Author:   Dan.Patterson@carleton.ca
:Modified: 2016-08-14
:Purpose:  none
:Functions:  help(<function name>) for help
:----------------------------
: _demo  -  This function ...
:Notes:
:References
:
"""
#---- imports, formats, constants ----

import sys
import numpy as np
from textwrap import dedent

ft = {'bool':lambda x: repr(x.astype('int32')),
      'float': '{: 0.3f}'.format}
np.set_printoptions(edgeitems=10, linewidth=80, precision=2, suppress=True,
                    threshold=100, formatter=ft)
script = sys.argv[0]

#---- functions ----

def _demo():
    """   
    :Requires:
    :--------
    :
    :Returns:
    :-------
    :
    """
    return None

#----------------------
if __name__ == "__main__":
    """Main section...   """
    #print("Script... {}".format(script))
    _demo()

Some space for editing after should be left since positioning the cursor is difficult after the fact.

Output options

• You can paste text and graphics with a table column.
• You can format a column to a maximum pixel size.

Sample output with a graph

Option 0: 1000 points
[[ 2. 2.]
[ 3. 3.]] extents
.... snip
Time results: 1.280e-05 s, for 1000 repeats

point_in_polygon.png