Is there a way of executing a command in a string?

[Jerry He]

Hi,
suppose I have the following string

cmdstr = "b = lambda s: s*s"

Is there a way to execute this string other than
copying it onto a file and then importing it?

thanks in advance,

Jerry

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[Jeff Schwab]

Jerry He wrote:

Hi,
suppose I have the following string

cmdstr = "b = lambda s: s*s"

Is there a way to execute this string other than
copying it onto a file and then importing it?

exec "b = lambda s: s*s"
b

<function <lambda> at 0x4d69cc>

[Mike Meyer]

Jeff Schwab <je************@rcn.com> writes:

Jerry He wrote:

Hi, suppose I have the following string
cmdstr = "b = lambda s: s*s"
Is there a way to execute this string other than
copying it onto a file and then importing it?

>>> exec "b = lambda s: s*s"
>>> b

Jeff forgot to warn you that exec is a *dangerous* function. Don't use
it on data that you aren't 100% sure of the origin of. Better yet,
avoid it if at all possible.

If you'll tell us why you think you need to do this, possibly we can
help you avoid using exec.

<mike
--
Mike Meyer <mw*@mired.org> http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.