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Hi folks. I'm learning Python from the Mark Lutz Book, Programming
Python 3rd edition.

He seems to be able to invoke the Python interpreter from any command
line prompt.

C:\temp>python

C:\PP3rdEd\examples>python

C:\PP3rdEd\Examples\PP3E\System>cd

Whereas I am only able to invoke it when the command line is pointing
to the directory where the executable resides. Currently:

C:\Python25

Is there a way to set this so I can also invoke it from any command
line prompt?

Thankyou very much.

waltbrad wrote:
> Hi folks. I'm learning Python from the Mark Lutz Book, Programming
> Python 3rd edition.
>
> He seems to be able to invoke the Python interpreter from any command
> line prompt.
>
> C:\temp>python
>
> C:\PP3rdEd\examples>python
>
> C:\PP3rdEd\Examples\PP3E\System>cd
>
> Whereas I am only able to invoke it when the command line is pointing
> to the directory where the executable resides. Currently:
>
> C:\Python25
>
> Is there a way to set this so I can also invoke it from any command
> line prompt?
>
> Thankyou very much.

The Python executable must be found in your system path, that is why you
are unable to just simply type python at anytime at a command prompt.
Simple fix:

click Start > Control Panel > System > Advanced > Environment Variables
(bottom right)

Then you will have two list boxes one for user environment variables
another for system variables. I prefer placing the path in the System
environment variables section that way it is available for all accounts
on the system (provided you have more than 1 user on it).

In the System list locate the Path variables, select edit variable and
append ;C:\Python25 to it. And thats it reopen a new command prompt the
type python and it should just fire up.

Hope this helps.

Adonis Vargas

On Dec 9, 8:54 am, Adonis Vargas <adon...@REMOVETHISearthlink.net>
wrote:
> waltbrad wrote:
> > Hi folks. I'm learning Python from the Mark Lutz Book, Programming
> > Python 3rd edition.
>
> > He seems to be able to invoke the Python interpreter from any command
> > line prompt.
>
> > C:\temp>python
>
> > C:\PP3rdEd\examples>python
>
> > C:\PP3rdEd\Examples\PP3E\System>cd
>
> > Whereas I am only able to invoke it when the command line is pointing
> > to the directory where the executable resides. Currently:
>
> > C:\Python25
>
> > Is there a way to set this so I can also invoke it from any command
> > line prompt?
>
> > Thankyou very much.
>
> The Python executable must be found in your system path, that is why you
> are unable to just simply type python at anytime at a command prompt.
> Simple fix:
>
> click Start > Control Panel > System > Advanced > Environment Variables
> (bottom right)
>
> Then you will have two list boxes one for user environment variables
> another for system variables. I prefer placing the path in the System
> environment variables section that way it is available for all accounts
> on the system (provided you have more than 1 user on it).
>
> In the System list locate the Path variables, select edit variable and
> append ;C:\Python25 to it. And thats it reopen a new command prompt the
> type python and it should just fire up.
>
> Hope this helps.
>
> Adonis Vargas

Got it, Adonis. Thanks much.

Hi,

You need to edit your path variable. (I'm assuming you're using
Windows). Go to:

Settings > Control Panel > System > Advanced > Environment Variables.

Now double click on 'Path' and append ";C:\Python25\" (minus the
quotation marks) to the text displayed in the Variable Value box.

BW,

John

waltbrad wrote:
> Is there a way to set this so I can also invoke it from any command
> line prompt?

You can follow Adonis' advice but I'm going a different path on my
computer because I've multiple versions of Python installed on my box.

I usually put a simple batch file in c:\Windows, e.g. python25.bat

@C:\Python25\python.exe %*

I can start Python 2.5 with python25 from every directory.

Christian

waltbrad wrote:
> Is there a way to set this so I can also invoke it from any command
> line prompt?

You can follow Adonis' advice but I'm going a different path on my
computer because I've multiple versions of Python installed on my box.

I usually put a simple batch file in c:\Windows, e.g. python25.bat

@C:\Python25\python.exe %*

I can start Python 2.5 with python25 from every directory.

Christian