I am trying to import the importlib module but I get this message:
>>> importlib
Traceback (most recent call last):
File "<string>", line 1, in <module>
NameError: name 'importlib' is not defined
I have manually located the importlib file within the Python folder, so I know I have it. I am running Python version 3.4.1. I also tried to pip install importlib but it wasn't found either.
What's going on?
You need to use an import statement to load it in:
>>> import importlib
>>> importlib
<module 'importlib' from 'C:\\Python33\\lib\\importlib\\__init__.py'>
Related
How can you find where python imported a particular module from?
Each module object has a __file__ attribute:
import module
print module.__file__
Some modules are part of the Python executable; these will not have the attribute set.
Demo:
>>> import urllib2
>>> urllib2.__file__
'/Users/mj/Development/Library/buildout.python/parts/opt/lib/python2.7/urllib2.pyc'
>>> import sys
>>> sys.__file__
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute '__file__'
You could also run Python in verbose mode, with the -v command line switch or the PYTHONVERBOSE environment variable; Python then prints out every imported file as it takes place.
I tried to import a file var.py to openfile.py. var is passed as an argument to openfile. I am unable to figure out how to import it by reading the name from command line.
var = sys.argv[1]
importlib.import_module(var, package=None)
I tried the above code but it gave the below error
Traceback (most recent call last):
File "true.py", line 7, in <module>
importlib.import_module(var, package=None)
NameError: name 'importlib' is not defined
you are missing importlib module.
Thats why you are getting NameError: name 'importlib' is not defined
do import importlib
Note:
If imporlib is not installed, you can install it using easy_install/pip on *nix:
easy_install importlib
You have to import the importlib module first:
import importlib
....
importlib.import_module(...)
I'm running into an issue with cx_Freeze when running a frozen application (works fine unfrozen).
When running the program it results in the following traceback:
Traceback (most recent call last):
File "/usr/local/lib/python2.7/site-packages/cx_Freeze/initscripts/Console.py", line 27, in <module>
exec code in m.__dict__
File "PythonApp/mainframe.py", line 3, in <module>
File "/usr/local/lib/python2.7/site-packages/dbus/__init__.py", line 103, in <module>
from dbus._dbus import Bus, SystemBus, SessionBus, StarterBus
File "/usr/local/lib/python2.7/site-packages/dbus/_dbus.py", line 39, in <module>
from dbus.bus import BusConnection
File "/usr/local/lib/python2.7/site-packages/dbus/bus.py", line 39, in <module>
from dbus.connection import Connection
File "/usr/local/lib/python2.7/site-packages/dbus/connection.py", line 27, in <module>
import threading
File "/usr/local/lib/python2.7/threading.py", line 44, in <module>
module='threading', message='sys.exc_clear')
File "/usr/local/lib/python2.7/warnings.py", line 57, in filterwarnings
import re
File "/usr/local/lib/python2.7/re.py", line 105, in <module>
import sre_compile
File "/usr/local/lib/python2.7/sre_compile.py", line 14, in <module>
import sre_parse
File "/usr/local/lib/python2.7/sre_parse.py", line 17, in <module>
from sre_constants import *
File "/usr/local/lib/python2.7/sre_constants.py", line 18, in <module>
from _sre import MAXREPEAT
ImportError: cannot import name MAXREPEAT
I'm on linux using a version of python 2.7.4 that I built from source, and importing _sre from a prompt works and I can access the MAXREPEAT constant.
This is usually down to cx_Freeze not pulling everything into library.zip and can be fixed by explicitly naming the module in cx_Freezes setup include list and is the solution to this similar question, but that hasn't helped here.
This _sre module seems weird.. there's no _sre file in the library.zip generated but from that error it seems like it can find it, however it can't import that symbol? Surely if the module wasn't there it would be a "No module named _sre" error. Or possibly a circular import but _sre stub doesn't have any imports.
What's odd is I can't seem to find the file either - is this module dynamically created when importing somehow?
find /usr/local/lib/python2.7 -name "_sre*"
doesn't return anything, and the imported _sre module doesn't have a __file__ attribute either, so I've no idea how to make sure it's included as it shows up as a built-in.
>>> import _sre
>>> _sre.__file__
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute '__file__'
>>> repr(_sre)
"<module '_sre' (built-in)>"
This is similar to this question also which was asked recently, but in this case he was getting the error in the regular interpreter, however for me it's just in cx_Freeze.
edit
Running python -v does seem like it's a built-in, so I'm not sure why cx_Freeze can miss it, or how I'd fix it.
...
# /usr/local/lib/python2.7/re.pyc matches /usr/local/lib/python2.7/re.py
import re # precompiled from /usr/local/lib/python2.7/re.pyc
# /usr/local/lib/python2.7/sre_compile.pyc matches /usr/local/lib/python2.7/sre_compile.py
import sre_compile # precompiled from /usr/local/lib/python2.7/sre_compile.pyc
import _sre # builtin
# /usr/local/lib/python2.7/sre_parse.pyc matches /usr/local/lib/python2.7/sre_parse.py
import sre_parse # precompiled from /usr/local/lib/python2.7/sre_parse.pyc
...
I encountered this problem when I just upgraded from ubuntu 12.10 to 13.04, and I fixed this by copying the /usr/bin/python to /path/to/my/env/bin/, and it worked just fine
cp /user/bin/python /path/to/my/env/bin/
or, there's a more elegant way to fix this(reference):
mkvirtualenv <existing virtualenv name>
_sre is a built in module, so there's no file to include for it, but it doesn't have a MAXREPEAT attribute in Python 2.7.3:
>>> import _sre
>>> _sre
<module '_sre' (built-in)>
>>> _sre.MAXREPEAT
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'MAXREPEAT'
My best guess is that your frozen copy somehow has the standard library .py modules from Python 2.7.4, but the compiled Python interpreter from 2.7.3 or an earlier version. I see you're working from /usr/local - maybe it's picking up an older version from /usr.
If all else fails, I got things running using this: http://www.kiwisoft.co.uk/blog/2014/08/17/fixed-importerror-cannot-import-name-maxrepeat
I had the same problem recently. Setting LD_LIBRARY_PATH=
solved the problem.
I was using cx_freeze 4.3.2 on my win 8 machine and it was always showing ImportError: cannot import name MAXREPEAT with cx Freeze if I ever tried to freeze a non built-in module, and once I downloaded version 4.3.1, it works, I'm able to freeze my all python 3.3 programs without any problem now.
I was having similar issues on windows 8 - was just a PYTHONPATH issue. check that PYTHONPATH exists by typing the following into a python session:
import os
os.environ['PYTHONPATH'].split(os.pathsep)
if you get an error set your PYTHONPATH using this approach..
How to add to the pythonpath in windows 7?
I'm running into an issue with cx_Freeze when running a frozen application (works fine unfrozen).
When running the program it results in the following traceback:
Traceback (most recent call last):
File "/usr/local/lib/python2.7/site-packages/cx_Freeze/initscripts/Console.py", line 27, in <module>
exec code in m.__dict__
File "PythonApp/mainframe.py", line 3, in <module>
File "/usr/local/lib/python2.7/site-packages/dbus/__init__.py", line 103, in <module>
from dbus._dbus import Bus, SystemBus, SessionBus, StarterBus
File "/usr/local/lib/python2.7/site-packages/dbus/_dbus.py", line 39, in <module>
from dbus.bus import BusConnection
File "/usr/local/lib/python2.7/site-packages/dbus/bus.py", line 39, in <module>
from dbus.connection import Connection
File "/usr/local/lib/python2.7/site-packages/dbus/connection.py", line 27, in <module>
import threading
File "/usr/local/lib/python2.7/threading.py", line 44, in <module>
module='threading', message='sys.exc_clear')
File "/usr/local/lib/python2.7/warnings.py", line 57, in filterwarnings
import re
File "/usr/local/lib/python2.7/re.py", line 105, in <module>
import sre_compile
File "/usr/local/lib/python2.7/sre_compile.py", line 14, in <module>
import sre_parse
File "/usr/local/lib/python2.7/sre_parse.py", line 17, in <module>
from sre_constants import *
File "/usr/local/lib/python2.7/sre_constants.py", line 18, in <module>
from _sre import MAXREPEAT
ImportError: cannot import name MAXREPEAT
I'm on linux using a version of python 2.7.4 that I built from source, and importing _sre from a prompt works and I can access the MAXREPEAT constant.
This is usually down to cx_Freeze not pulling everything into library.zip and can be fixed by explicitly naming the module in cx_Freezes setup include list and is the solution to this similar question, but that hasn't helped here.
This _sre module seems weird.. there's no _sre file in the library.zip generated but from that error it seems like it can find it, however it can't import that symbol? Surely if the module wasn't there it would be a "No module named _sre" error. Or possibly a circular import but _sre stub doesn't have any imports.
What's odd is I can't seem to find the file either - is this module dynamically created when importing somehow?
find /usr/local/lib/python2.7 -name "_sre*"
doesn't return anything, and the imported _sre module doesn't have a __file__ attribute either, so I've no idea how to make sure it's included as it shows up as a built-in.
>>> import _sre
>>> _sre.__file__
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute '__file__'
>>> repr(_sre)
"<module '_sre' (built-in)>"
This is similar to this question also which was asked recently, but in this case he was getting the error in the regular interpreter, however for me it's just in cx_Freeze.
edit
Running python -v does seem like it's a built-in, so I'm not sure why cx_Freeze can miss it, or how I'd fix it.
...
# /usr/local/lib/python2.7/re.pyc matches /usr/local/lib/python2.7/re.py
import re # precompiled from /usr/local/lib/python2.7/re.pyc
# /usr/local/lib/python2.7/sre_compile.pyc matches /usr/local/lib/python2.7/sre_compile.py
import sre_compile # precompiled from /usr/local/lib/python2.7/sre_compile.pyc
import _sre # builtin
# /usr/local/lib/python2.7/sre_parse.pyc matches /usr/local/lib/python2.7/sre_parse.py
import sre_parse # precompiled from /usr/local/lib/python2.7/sre_parse.pyc
...
I encountered this problem when I just upgraded from ubuntu 12.10 to 13.04, and I fixed this by copying the /usr/bin/python to /path/to/my/env/bin/, and it worked just fine
cp /user/bin/python /path/to/my/env/bin/
or, there's a more elegant way to fix this(reference):
mkvirtualenv <existing virtualenv name>
_sre is a built in module, so there's no file to include for it, but it doesn't have a MAXREPEAT attribute in Python 2.7.3:
>>> import _sre
>>> _sre
<module '_sre' (built-in)>
>>> _sre.MAXREPEAT
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'MAXREPEAT'
My best guess is that your frozen copy somehow has the standard library .py modules from Python 2.7.4, but the compiled Python interpreter from 2.7.3 or an earlier version. I see you're working from /usr/local - maybe it's picking up an older version from /usr.
If all else fails, I got things running using this: http://www.kiwisoft.co.uk/blog/2014/08/17/fixed-importerror-cannot-import-name-maxrepeat
I had the same problem recently. Setting LD_LIBRARY_PATH=
solved the problem.
I was using cx_freeze 4.3.2 on my win 8 machine and it was always showing ImportError: cannot import name MAXREPEAT with cx Freeze if I ever tried to freeze a non built-in module, and once I downloaded version 4.3.1, it works, I'm able to freeze my all python 3.3 programs without any problem now.
I was having similar issues on windows 8 - was just a PYTHONPATH issue. check that PYTHONPATH exists by typing the following into a python session:
import os
os.environ['PYTHONPATH'].split(os.pathsep)
if you get an error set your PYTHONPATH using this approach..
How to add to the pythonpath in windows 7?
I have installed libsvm-3.12 and placed into:
/home/ubuntu/libsvm-3.12
In my pythonpath I have the following:
echo $PYTHONPATH
/home/ubuntu/libsvm-3.12/python:/home/ubuntu/libsvm-3.12:$PYTHONPATH
This is in both .bashrc in home and in /etc/enviroments
I rebooted the machine.
From python I get:
>>> import svmulti
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named svmulti
How do I let python know where the lib is?
Given installation via make in .../libsvm-3.12/python,I think you also want:
>>> import svmutil
not:
>>> import svmulti