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Python Can't Find Module In Site-packages


Its very easy to get wrong. How do I answer a question on graduate school applications on textbooks used in my classes, when my class didn't use a textbook? Open up a command prompt and 'cd' into your '2014_07_13_test' directory. Navigation index modules | next | previous | PyMOTW » Python Runtime Services » sys - System-specific Configuration » View the discussion thread.blog comments powered by Disqus © Copyright Doug Hellmann. http://awendigital.com/not-find/could-not-find-a-pty-mac.html

Executing the main module twice¶ This is a variant of the above double import problem that doesn't require any erroneous sys.path entries. Reply ↓ Jack Roh on January 21, 2014 at 9:38 am said: Thanks~! Adding a custom module finder is as simple as appending a factory to the sys.path_hooks list. These compilers require some special libraries. http://stackoverflow.com/questions/24722212/python-cant-find-module-in-the-same-folder

Python Can't Find Module In Site-packages

Important is, that your Python interpreter has current directory set properly. –Jan Vlcinsky Jul 13 '14 at 11:52 add a comment| 2 Answers 2 active oldest votes up vote 12 down Submodules 5.4.3. In this case, Python first tries to import foo, then foo.bar, and finally foo.bar.baz. package imported done looking for "package.module3" in /tmp/pymotw_import_example.shelve ...

Files are installed as follows: Type of file Installation directory modules prefix\Lib\site-packages scripts prefix\Scripts data prefix C headers prefix\Include\distname Custom Installation¶ Sometimes, the To add a path, launch ipython and type: import sys
print sys.path
Note: You only have to update your PYTHONPATH once, not every time you use Python! The NoisyImportFinder raises ImportError when instantiated with a path entry that does not match its special trigger value, which is obviously not a real path on the filesystem. Python Can't Find Module In Same Directory If they can find the named module, they return a module spec, an encapsulation of the module's import-related information, which the import machinery then uses when loading the module.

See the import statement for the exact details of that name binding operation. Python Cannot Find Module In Same Directory Editing PYTHONPATH Python won't just search your computer for the MyModule.py file you're trying to import. This output was created using a copy of the interpreter installed from the standard python.org installer for OS X. $ python sys_builtins.py __builtin__ __main__ _ast _codecs _sre _symtable _warnings _weakref errno http://stackoverflow.com/questions/19972669/python-not-finding-module If set, the contents of CFLAGS will be added to the compiler flags specified in the Setup file.

Setting __spec__ appropriately applies equally to modules initialized during interpreter startup. Python Not Finding Module In Site-packages However, it is also useful in that it makes it possible to explicitly declare that a package is closed to additional contributions. Objects that implement both of these interfaces are referred to as importers - they return themselves when they find that they can load the requested module. Changed in version 3.6: The value of __package__ is expected to be the same as __spec__.parent. __spec__¶ The __spec__ attribute must be set to the module spec that

Python Cannot Find Module In Same Directory

the path entry finder sets "loader" on the spec to None and "submodule_search_locations" to a list containing the portion. https://leemendelowitz.github.io/blog/how-does-python-find-packages.html Path entry finders 5.5.2. Python Can't Find Module In Site-packages The most convenient way is to add a path configuration file to a directory that's already on Python's path, usually to the .../site-packages/ directory. Python Cannot Find Module In Path References¶ The import machinery has evolved considerably since Python's early days.

not algorithms itself but it's parent) needs to be in sys.path share|improve this answer answered Nov 14 '13 at 8:44 Aaron Digulla 207k60377584 Trying to insert into teste.py the http://awendigital.com/not-find/wine-cannot-find-directory.html Execution is entirely delegated to the loader, which gets to decide what gets populated and how. Import hooks 5.3.4. Specifically, any module that contains a __path__ attribute is considered a package. Python Cannot Find Installed Module

For example, if you wanted to support path entries as network URLs, you could write a hook that implements HTTP semantics to find modules on the web. Some of the features described here may not be available in earlier versions of Python. And submodules can and do import siblings, but mostly packages are intended to be used by other programs (and installed into a system package directory), not necessarily to be programs in http://awendigital.com/not-find/cannot-find-table-0-in-asp-net-c.html Instead of creating a new module object, the existing module is re-used.

Standard Build and Install¶ As described in section The new standard: Distutils, building and installing a module distribution using the Distutils is usually one simple command to run from a terminal: Python Library Path Linux This location varies by platform and by how you built/installed Python itself. Even though 3.3 cleaned up a lot of things, it still has to deal with various backwards compatibility issues that can cause strange behaviour, and may need to be understood in

For example, the following file system layout defines a top level parent package with three subpackages: parent/ __init__.py one/ __init__.py two/ __init__.py three/ __init__.py Importing parent.one will implicitly execute

share|improve this answer answered Mar 14 '13 at 8:23 Javier Rivera 25.4k66495 add a comment| up vote 3 down vote You should be able to find it in the following locations This hook (a callable) would return a path entry finder supporting the protocol described below, which was then used to get a loader for the module from the web. For example, your site may have a convention of keeping all software related to the web server under /www. Python Module Search Path Reply ↓ Pingback: PYTHONPATH | monsteR#bash ben on August 17, 2014 at 6:53 am said: What about a .py file that loads a .ui file?

copy from PEP 395). 5.9. They can refer to URLs, database queries, or any other location that can be specified as a string. This is somewhat inflexible, but there's not really any way to make it easier (until PEP 395 gets undeferred and implemented). weblink Furthermore, if multiple configuration files apply, values from "earlier" files are overridden by "later" files.

It is enabled with a simple option: python setup.py install --user Files will be installed into subdirectories of site.USER_BASE (written as userbase hereafter). With absolute imports, the way to get module_c is always the big, ugly mouthful of code from my_package.sub_package.sub_sub_package import module_c regardless of what module is doing the importing. The exact name of this package varies among them. If the path argument is None, this indicates a top level import and sys.path is used.

The Path Based Finder¶ As mentioned previously, Python comes with several default meta path finders. PEP 328 introduced absolute and explicit relative imports and initially proposed __name__ for semantics PEP 366 would eventually specify for __package__. Keeping main modules small and simple also helps to avoid a few potential problems with object serialisation as well as with the multiprocessing package. For importing, it does not matter, that the importing and and imported files share a directory.

Were Palpatine or Vader ever congratulatory or nice to any of their subordinates? Replacing the standard import system¶ The most reliable mechanism for replacing the entire import system is to delete the default contents of sys.meta_path, replacing them entirely with a custom meta On Unix, lazy typists can just type a tilde (~); the install command will expand this to your home directory: python setup.py install --home=~ To make Python find the distributions The return value of __import__() is used to perform the name binding operation of the import statement.

We are using Python 2.7 on Linux Ubuntu 13.10. Bookmark the permalink. 9 thoughts on “Editing PYTHONPATH (or "Where's my module?!")” kelle on September 18, 2012 at 12:31 pm said: The directory structure I encourage is ~/Code/Python/Project. Changed in version 3.4: The load_module() method was replaced by exec_module() and the import machinery assumed all the boilerplate responsibilities of loading. All modules have a name.

Once you've loaded python or ipython, they don't know or care about $PYTHONPATH, just whatever was set in sys.path. If the module has no __file__ but does have a __loader__ that is not None, then the loader's repr is used as part of the module's repr. This means that configuration files will override default values, and the command-line will in turn override configuration files. The Python version was hardcoded in the configure file, so I had to install that version instead, in my case: apt-get install python3.4-dev share|improve this answer answered Nov 30 '15 at

This name may come from various arguments to the import statement, or from the parameters to the importlib.import_module() or __import__() functions.