from-import ImportError

[echellwig]

Hi,

I downloaded some code from a university website that calculates a metric evolutionary trees. I'm trying to run the program (called example.py) and the first line of the program is

from TreeGenerator import Tree_generator

I did not think this would be a problem because TreeGenerator.py is another file in the folder I downloaded. However, when I try to run the program it says that it cannot find the module TreeGenerator. I tried putting the folder in my path but that didn't work. I was wondering if there was any specific place in thy python folder that I have to put modules like that. Thanks!

Elise

[TrustyTony]

Are these two files in exactly same directory or different subdirectories? Have you tried to put the library to site-packages directory. Is there setup.py file and have you read any included readme or instalk files?

[vegaseat]

You can use sys.path ...

# show the system path (aka. PYTHONPATH)
# as a list of directories that Python by default looks into
# the first item will be the working directory
# the directory  C:\\Python26\\lib\\site-packages
# might be the best to add your own modules to
# even though it is meant for packages only

import sys
print(sys.path)

"""possible output on Windows OS -->
[
'C:\\Python26\\Atest26\\aatest26',
'C:\\WINDOWS\\system32\\python26.zip',
'C:\\Python26\\DLLs',
'C:\\Python26\\lib',
'C:\\Python26\\lib\\plat-win',
'C:\\Python26\\lib\\lib-tk',
'C:\\Python26',
'C:\\Python26\\lib\\site-packages',
'C:\\Python26\\lib\\site-packages\\PIL',
'C:\\Python26\\lib\\site-packages\\wx-2.8-msw-unicode'
]
"""

This works on Windows or Unix, only the directory names will change.

[Beat_Slayer]

Quick Fix

from sys import path
path.append('path_to_files')

[jcao219]

I can't think of anything.
If it is in the same directory, then that line should work.
Check your spelling of the module name?
Sometimes it is something simple.

[ultimatebuster]

do you have an __init__.py file in the module folders? Sometimes that might cause the problem