How can I import functions from another python file

[yinglcs@gmail.com]

Hi,
i have 2 python files in *different directory* , how can I import
python functions from 1 python file to another?

i get this error:
import task
ImportError: No module named task/

Thank you.

[Lee Harr]

Re: How can I import functions from another python file

On 2007-04-09, yinglcs@gmail.c om <yinglcs@gmail. comwrote:

Hi,
i have 2 python files in *different directory* , how can I import
python functions from 1 python file to another?
>
i get this error:
import task
ImportError: No module named task/
>

The directory that module is in must by on your python
path in order to import it. You can do it by modifying
sys.path or by setting the PYTHONPATH env variable.


$ mkdir otherdir
$ cat otherdir/amod.py
def afunc():
return 'found'
$ python

>>import amod

Traceback (most recent call last):
File "<stdin>", line 1, in ?
ImportError: No module named amod

>>import sys
>>sys.path.appe nd('otherdir')
>>import amod
>>amod.afunc( )

'found'

[Gabriel Genellina]

Re: How can I import functions from another python file

En Mon, 09 Apr 2007 18:06:11 -0300, yinglcs@gmail.c om <yinglcs@gmail. com>
escribió:

i have 2 python files in *different directory* , how can I import
python functions from 1 python file to another?

See the tutorial about modules, packages, and the module search path:

http://docs.python.org/tut/node8.html

You can extend the search path using .pth files:

http://docs.python.org/lib/module-site.html

(but consider using packages instead of cluttering your search path with
infinite entries)

--
Gabriel Genellina

[Shane Geiger]

Re: How can I import functions from another python file

>Hi,
>i have 2 python files in *different directory* , how can I import
>python functions from 1 python file to another?
>>
>i get this error:
>import task
>ImportError: No module named task/
>>
>>

>
>
The directory that module is in must by on your python
path in order to import it.

That's not exactly correct. You *can* import from files that aren't in
your sys.path. What follows is a full-working (with python 2.5)
example. Perhaps ihooks is going to be obsolete at some point, but it
works now. See PEP 302 for more info. (I'm not sure how to modify this
example to work with a newer import mechanism or else I would provide it
to you.)



import os
def writefile(f, data, perms=750): open(f, 'w').write(data ) and
os.chmod(f, perms)

foobar = """
print "this is from the foobar module"

def x():
print "This is the x function."

"""

writefile('/tmp/foobar.py', foobar)


# File:ihooks-example-1.py
import ihooks, imp, os, sys
def import_from(fil ename):
"Import module from a named file"
if not os.path.exists( filename):
sys.stderr.writ e( "WARNING: Cannot import file." )
loader = ihooks.BasicMod uleLoader()
path, file = os.path.split(f ilename)
name, ext = os.path.splitex t(file)
m = loader.find_mod ule_in_dir(name , path)
if not m:
raise ImportError, name
m = loader.load_mod ule(name, m)
return m

foo = import_from("/tmp/foobar.py")

print foo.x
print foo.x()
print foo.x()

You can do it by modifying
sys.path or by setting the PYTHONPATH env variable.
>
>
$ mkdir otherdir
$ cat otherdir/amod.py
def afunc():
return 'found'
$ python
>

>>>import amod
>>>>

Traceback (most recent call last):
File "<stdin>", line 1, in ?
ImportError: No module named amod
>

>>>import sys
>>>sys.path.app end('otherdir')
>>>import amod
>>>amod.afunc ()
>>>>

'found'
>

--
Shane Geiger
IT Director
National Council on Economic Education
sgeiger@ncee.ne t | 402-438-8958 | http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy