import checks to see if the module is in sys.modules, and if it is, it returns it. If you want import to load the module fresh from disk, you can delete the appropriate key in sys.modules first. There is the reload builtin function which will, given a module object, reload it from disk and that … Read more
You have circular dependent imports. physics.py is imported from entity before class Ent is defined and physics tries to import entity that is already initializing. Remove the dependency to physics from entity module.
If you are running app/server.py as a script, the parent directory of app is not added to sys.path(). The app directory itself is added instead (not as a package but as a import search path). You have 4 options: Move server.py out of the app package (next to it) Add a new script file next … Read more
You’ve got an __init__.py in your top level directory. That makes it a package. If you remove it, your nosetests should work. If you don’t remove it, you’ll have to change your import to import dir.foo, where dir is the name of your directory.
Dived a bit into the source code. The output of sys.platform and os.name are determined at compile time. platform.system() determines the system type at run time. sys.platform is specified as a compiler define during the build configuration. os.name checks whether certain os specific modules are available (e.g. posix, nt, …) platform.system() actually runs uname and … Read more
The changelog is sloppily worded. from __future__ import absolute_import does not care about whether something is part of the standard library, and import string will not always give you the standard-library module with absolute imports on. from __future__ import absolute_import means that if you import string, Python will always look for a top-level string module, … Read more
The Counter class was added to the module in Python 2.7. You are most likely using Python 2.6 or older. From the collections.Counter() documentation: New in version 2.7. On python 2.5 or 2.6, use this backport instead.
In another.py, move the code that you don’t want to be ran into a block that only runs when the script is explicitly called to run and not just imported def my_func(x): return x if __name__ == ‘__main__’: # Put that needs to run here Now if you are in your_script.py, you can import the … Read more
First let’s start with how from import work in python: Well first let’s look at the byte code: >>> def foo(): … from foo import bar >>> dis.dis(foo) 2 0 LOAD_CONST 1 (-1) 3 LOAD_CONST 2 ((‘bar’,)) 6 IMPORT_NAME 0 (foo) 9 IMPORT_FROM 1 (bar) 12 STORE_FAST 0 (bar) 15 POP_TOP 16 LOAD_CONST 0 (None) … Read more
Please reconsider. The only thing worse than import * is magic import *. If you really want to: m = __import__ (S) try: attrlist = m.__all__ except AttributeError: attrlist = dir (m) for attr in attrlist: globals()[attr] = getattr (m, attr)