On 2017-02-10 00:05, Wildman via Python-list wrote:
On Fri, 10 Feb 2017 09:53:32 +1100, Cameron Simpson wrote:
On 09Feb2017 11:59, Wildman <best_...@yahoo.com> wrote:
Here is a method I frequently use to replace the which
command. (air code)
import os
pathlist = os.environ["PATH"].split(":")
def which(target)
for p in pathlist:
fullpath = p + "/" + target
if os.path.isfile(fullpath):
return fullpath, True
return "", False
Cleaner is to return the path if found, or None if not.
I don't see this as an important issue but you are
right.
target, found = which("pandoc")
if found:
target will contain the full path to pandoc
else:
pandoc was not found
You want to check for execute permssion too.
For my uses of the above code, it is unlikely that
the 'target' would not have the exec bit set. But,
your suggestion is valid due to the fact that I
should not take anything for granted.
Cheers,
Cameron Simpson <c...@zip.com.au>
Corrected code:
def which(target)
for p in pathlist:
fullpath = p + "/" + target
if os.path.isfile(fullpath) and os.access(fullpath, os.X_OK):
return fullpath, True
return None, False
Thanks.
The implication was that you don't need the True/False, just the
string/None.
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