python does not work in command prompt

[memoljpn]

BPO	7496
Nosy	@brettcannon, @benjaminp, @bitdancer

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2009-12-13.21:21:46.454>
created_at = <Date 2009-12-13.20:35:46.779>
labels = ['OS-windows', 'type-crash']
title = 'python does not  work in command prompt'
updated_at = <Date 2009-12-13.22:16:24.589>
user = 'https://bugs.python.org/memoljpn'

bugs.python.org fields:

activity = <Date 2009-12-13.22:16:24.589>
actor = 'r.david.murray'
assignee = 'none'
closed = True
closed_date = <Date 2009-12-13.21:21:46.454>
closer = 'brett.cannon'
components = ['Windows']
creation = <Date 2009-12-13.20:35:46.779>
creator = 'memol_jpn'
dependencies = []
files = []
hgrepos = []
issue_num = 7496
keywords = []
message_count = 4.0
messages = ['96351', '96357', '96361', '96362']
nosy_count = 4.0
nosy_names = ['brett.cannon', 'benjamin.peterson', 'r.david.murray', 'memol_jpn']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue7496'
versions = ['Python 3.1']

[memoljpn]

when i type python in my command promp this message is shown :

C:\Documents and Settings\X>python
Fatal Python error: Py_Initialize: can't initialize sys standard streams
LookupError: unknown encoding: cp720

This application has requested the Runtime to terminate it in an unusual
way.
Please contact the application's support team for more information.

what's the problem ?!

[brettcannon]

Your OS is using an encoding called cp720 which Python knows nothing
about. That means it can't open stdout, stderr, or stdin properly for
reading/writing according to your set codec. You need to use a codec
recognized by Python or add support for your codec to allow it to run.

[benjaminp]

See bpo-1616979.

[bitdancer]

As Benjamin points out, this is a duplicate of bpo-1616979, which has
been fixed in both trunk and py3k. For future reference, Mohammad, a
search with the string 'cp720' and 'status' set to 'don't care' would
have brought up that bug report. The tracker's default of searching
only open bugs can be misleading if you don't notice it.