Thanks for the quick response.
My set up of python path in .emacs is:
(setq python-shell-interpreter "C:\\Python27\\Scripts\\ipython")
(setq python-shell-interpreter-args "-i --profile=dev --colors=Linux")

Da

On 3/31/2015 2:24 PM, Eli Zaretskii wrote:
>> Date: Tue, 31 Mar 2015 13:52:20 -0400
>> From: Da Zhang <zhangda82@gmail.com>
>>
>> I am using Python mode in Emacs and wanted to start a python
>> sub-process.
>> However, Emacs could not find python.exe from the path I specified.
>> Particularly, the following message was displayed:
>> apply: Searching for program: no such file or directory,
>> c\:/Python27/Scripts/ipython.exeInvalid face reference: python-cell
>>
>> It seemed a "C\:" was added in front of the path to the python.
> You didn't say which path of Python did you specify, and how didyou
> specify it.  Please tell, otherwise it's very hard to figure out the
> reason for the problem.