Why does Python fail to run a program when I run it from its own directory? -

this not working:

numbers directory:

$ cat numbers.py import networkx nx   ~/numbers $ python2.7 < numbers.py 

this gives me few errors end like:

'module' object has no attribute 'number' 

this working:

~ $ python2.7 < numbers/numbers.py 

i installed networkx following these instructions: http://networkx.github.io/documentation/latest/install.html

download source (tar.gz or zip file) https://pypi.python.org/pypi/networkx/ or latest development version https://github.com/networkx/networkx/ unpack , change directory source directory (it should have files readme.txt , setup.py). run python setup.py install build , install (optional) run nosetests execute tests if have nose installed. 

the tests run fine, don't understand why trivial program containing "import networkx nx" won't run.

what difference between these 2 situations ?

you passing in script on stdin, instead of on command line, python adds current working directory sys.path instead of numbers.

normally, python adds directory of script first element in sys.path:

as initialized upon program startup, first item of list, path[0], directory containing script used invoke python interpreter. if script directory not available (e.g. if interpreter invoked interactively or if script read standard input), path[0] empty string, directs python search modules in current directory first.

if having import problems, sounds if wrong module being imported; perhaps masking stdlib module 1 same name, locating in numbers. rename module.