when i am importing some modules from python shell, import work fine:
for example: (link for propy module https://code.google.com/p/protpy/downloads/list)
>>> import propy
>>>
but when i write script with python Default IDLE or with other IDE and save it to as .py script , import statements not work and generate error like this
python fragment_generator.py
>>>
Traceback (most recent call last):
File "J:\acetylome scripts\New folder\fragment_generator.py", line 1, in <module>
import propy
ImportError: No module named propy
>>>
please solve it
thanks in advance:
When you run the shell from the same directory the files are in the import will work. You are probably working from another directory when the import fails.
you can add a directory to the python path like this.
befor your import:
import sys
sys.path.append('/path/to/your/folder')
import propy
good luck.
Related
Guys I'm new in Python and I'm trying to understand modules.I have a folder in desktop and there are 2 module in that folder. One of them is pr.py ,it's takes a array and displays it.And other one is fillArray.py.Now I want to add these 2 friend into interpreter but when I used in interpreter import pr.py or import fillArray it's giving to me this error
>>> import pr
Traceback (most recent call last):
File "<pyshell#0>", line 1, in <module>
import pr
ImportError: No module named pr
Then if I clicked f5(run) in pr.py module ,write again in interpreter import pr it works.That's ok.But trying to run fillArray.py module same steps, it's restart interpreter and it works butpr.py module is removing.How can I handle this?By the way this can be unnecessary but I'm using python2.7.
Edit:I wrote print.py sorry it should be pr.py
If you have both the modules in the same folder, you can use . which specifies current directory as follows:
from .pr import *
This statement will import all functions of print.py which is in the current directory
If you want specific things to be imported, just specify using their names
from .pr import myfunc1, myfunc2, myclass1, myclass2
If you wish to import the whole module, use:
from . import pr
Hope this helps :)
I have a package my_scripting_library I want to use anywhere on machine. It has an init.py:
from silo_functions import *
and looks like
my_scripting_library
-__init__.py
-silo_functions.py
-test_stuff.py
test_stuff.py looks like:
#!/usr/bin/env python
from silo_functions import *
lines = read_lines('filepath.py')
print lines
in bashrc:
export PYTHONPATH="${PYTHONPATH}:$LIBRARY"
where LIBRARY is a correct filepath to my_scripting_library
In [1]: import sys
In [2]: sys.path
Out[2]:
['',
'/usr/bin',
'/usr/lib/python2.7/site-packages/lxml-3.3.3-py2.7-linux-x86_64.egg',
'/home/cchilders/scripts/python/my_scripting_library',
...
'/home/cchilders/.ipython']
running test_stuff with from .silo_functions import * causes:
Traceback (most recent call last):
File "./test_stuff.py", line 3, in <module>
from .silo_functions import *
ValueError: Attempted relative import in non-package
running test_stuff with from my_scripting_library.silo_functions import * causes:
Traceback (most recent call last):
File "./test_stuff.py", line 3, in <module>
from my_scripting_library.silo_functions import *
ImportError: No module named my_scripting_library.silo_functions
but running test_stuff with from silo_functions import * works:
it prints the lines
Of course I can't use this package from other folders, which is the real issue- I don't want to be forced into throwing all scripts in this one place. This is causing huge problems as I am constantly reusing dozens of functions each script, and over 5 tutorials on making a folder a python package never have worked yet. Why is something on the python path with an init not a package? Thank you
May be it is because you've added '.../python/my_scripting_library' to your path. But there are no 'my_scripting_library.py' at this folder.
If you want to use 'my_scripting_library.silo_functions', try to add '/home/cchilders/scripts/python' (not '/home/cchilders/scripts/python/my_scripting_library') to path.
Because 'my_scripting_library' is module. Python will find this folder, find __init__.py in this folder and mark it as module.
I try to run Sympy, a library for Python but I got a problem...
When I import Sympy in the console
>>> import os
>>> from os import chdir
>>> chdir("C:/sympy-0.7.2")
>>> import sympy
>>>
It works, but if I make a script with this content...ERROR!
Why ?
This error
Traceback (most recent call last):
File "**", line 4, in <module>
import sympy
ImportError: No module named sympy
try this..
import sys
sys.path.append("C:/sympy-0.7.2")
import sympy
Run the script from C:/sympy-0.7.2.
Better yet, install sympy. It will go into your site-packages directory
and will be available from anywhere. Going into C:/sympy-0.7.2 and typing python setup.py install should work.
I decided to develop my home project in python 3.x rather than 2.x. So I decided to check, if it works under 3.1. I run python3.1 above my package directory and then:
>>> import fathom
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "fathom/__init__.py", line 3, in <module>
from schema import Database
ImportError: No module named schema
when I enter fathom directory however schema can be imported:
>>> import schema
Also when I run python2.6 above my package directory I can do this:
>>> import fathom
My __init__.py has following import:
from schema import Database
from inspectors import PostgresInspector, SqliteInspector, MySqlInspector
Should I add something for python3.1?
Did you try a relative import?
from . import schema
from .inspectors import PostgresInspector
Works in Python 2.6 as well.
The 2to3 script can help you pinpoint more of these problems.
I'm a Python newbie, so bear with me :)
I created a file called test.py with the contents as follows:
test.py
import sys
print sys.platform
print 2 ** 100
I then ran import test.py file in the interpreter to follow an example in my book.
When I do this, I get the output with the import error on the end.
win32
1267650600228229401496703205376
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named py
Why do I get this error and how do I fix it? Thanks!
Instead of:
import test.py
simply write:
import test
This assumes test.py is in the same directory as the file that imports it.
This strange-looking error is a result of how Python imports modules.
Python sees:
import test.py
Python thinks (simplified a bit):
import module test.
search for a test.py in the module search paths
execute test.py (where you get your output)
import 'test' as name into current namespace
import test.py
search for file test/py.py
throw ImportError (no module named 'py') found.
Because python allows dotted module names, it just thinks you have a submodule named py within the test module, and tried to find that. It has no idea you're attempting to import a file.
You don't specify the extension when importing. Just do:
import test
As others have mentioned, you don't need to put the file extension in your import statement. Recommended reading is the Modules section of the Python Tutorial.
For a little more background into the error, the interpreter thinks you're trying to import a module named py from inside the test package, since the dot indicates encapsulation. Because no such module exists (and test isn't even a package!), it raises that error.
As indicated in the more in-depth documentation on the import statement it still executes all the statements in the test module before attempting to import the py module, which is why you get the values printed out.