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The python creed of "Better to ask forgiveness than permission" is largely meant to ensure you actually act correctly when you don't get what you want. The reason I suggest it looks broken is because in Python's spirit of duck-typing, all you should want is something dict-like, and a defaultdict fits that requirement perfectly, as would any The matrix will be sparse. It appears to keep the code simpler, too, which was why my co-workers and I had done it for months. navigate here

This could also be used to give a default path rather than None as shown below. >>> d = {"a":1, "b":2} >>> x = d.get("A",None) >>> print x None share|improve this I do like what this method does though, I'll look into it deeper. –user112358 Jan 27 '14 at 16:25 @Stick - you do: data = myDict.get(a_key, default), and either We could write an if statement, using the result of this method to determine whether or not we should try to access the given key. You can easily create these in h5py by using h5py.SoftLink: >>> myfile = h5py.File('foo.hdf5','w') >>> group = myfile.create_group("somegroup") >>> myfile["alias"] = h5py.SoftLink('/somegroup') If the target is removed, they will "dangle": https://wiki.python.org/moin/KeyError

Python Keyerror Exception

And now we can do the assignment without error: >>> wordtag['walk']['VBZ']= 1 And now we can do other assignments to 'walk': >>> wordtag['walk']['NN1']= 1 And now when we ask for the robinelvin commented Jun 16, 2016 Raised this as wrong user and can't delete. This guide also teaches you safe and practical ways to scale applications through replication, load balancing, high availability, and failover.Updated to reflect recent advances in MySQL and InnoDB performance, features, and

Generate all brace-strings of length n Loading... KeyErrors in Python KeyErrors in Python are raised if you attempt to access an invalid key in a dictionary. Now instead of using 'Dict['a'], we use the NEARLY synonymous 'get' method. >>> Dict.get('a',0) 0 No error. Keyerror Python Json bryan-lunt commented Feb 15, 2016 I guess it needs a separate issue on the master branch, but it seems that load_weights will create the .h5 file if it doesn't exist.

But we never get to step (b) because step (a) raises a Key Error. Keyerror 0 Python erlizhou commented Jan 27, 2016 I also have this problem @cjmcmurtrie @bryan-lunt can you tell me the solution? fchollet/keras#1736 Sign up for free to join this conversation on GitHub. http://cs.carleton.edu/cs_comps/1213/pylearn/final_results/encyclopedia/keyError.html Values for broken soft or external links show up as None.

Course Forum Section 1 'KeyError: List' in Python when trying to run t... Python Keyerror Get Key Find lane lines Check if 2 arrays contain the same element Do handstand push-ups hit all the three shoulder heads? Objects may also be retrieved using byte strings, which will be passed on to HDF5 as-is. dest (String) - New location for object or link.

Keyerror 0 Python

Perhaps I'm not understanding dict.get(a_key, a_default) in the right context, but it seems like it's a precursor to writing 'not-a-switch-statement if/elses' or magic values. http://softwareengineering.stackexchange.com/questions/225238/python-if-foo-in-dict-vs-try-dictfoo We recommend upgrading to the latest Safari, Google Chrome, or Firefox. Python Keyerror Exception Reload to refresh your session. Python Catch Keyerror KeyError: 'walk' Same error.

bryan-lunt commented Dec 10, 2015 @TELSER1 Non-Existant and/or 0 byte h5 file. http://edsdefence.com/python-key/keyerror-4-python.php Return None to continue visiting until all objects are exhausted. share|improve this answer edited Jan 10 '13 at 21:51 answered Jan 10 '13 at 21:44 Glenn Yu 3481411 add a comment| Your Answer draft saved draft discarded Sign up or Personal Open source Business Explore Sign up Sign in Pricing Blog Support Search GitHub This repository Watch 5 Star 80 Fork 16 owais/webpack-bundle-tracker Code Issues 3 Pull requests 0 Projects Python Key Error But Key Exists

visit(callable)¶ Recursively visit all objects in this group and subgroups. iterkeys()¶ (Py2 only) Get an iterator over key names. Reload to refresh your session. his comment is here The keys for the dictionary are words.

Because this says, (a) find the value for key 'walk' in dictionary wordtag; that should be a dictionary. (b) Then assign to that dictionary the value '1' for the key 'VBZ'. Python Raise Keyerror The source and destination need not be in the same file. In general we have to access wordtag throughout the computation, sometimes to update a piece of information (increment a count) sometimes just to look it up.

Code in except clause should not be a part of the normal flaw (e.g.

Use similar syntax as for soft links: >>> myfile = h5py.File('foo.hdf5','w') >>> myfile['ext link'] = h5py.ExternalLink("otherfile.hdf5", "/path/to/resource") When the link is accessed, the file "otherfile.hdf5" is opened, and object at "/path/to/resource" Why wasn't Peter Pettigrew bound with an Unbreakable Vow? See Dict interface and links. __setitem__(name, value)¶ Create a new link, or automatically create a dataset. Keyerror Django Hard links¶ What happens when assigning an object to a name in the group?

May be an absolute or relative path. Notice. items()¶ Get (name, value) pairs for object directly attached to this group. http://edsdefence.com/python-key/keyerror-none.php python share|improve this question asked Jan 23 '14 at 21:00 user112358 add a comment| 3 Answers 3 active oldest votes up vote 16 down vote accepted Use the get method instead:

On Py3, it's a collection or bag-like object. Thanks! expand_external - Expand external links into new objects. This forum is now read-only.

Options are explained in Creating datasets. Most words won't co-occur with most tags in the training data. See Using object references. Are endothermic bombs possible?

Why is water-contaminated fuel bad, but water-injection is not? How to proceed in light of peer-review confidentiality? scaleoffset - See Scale-Offset filter. On Py2, this is a list.

robinelvin commented Jun 28, 2016 @owais Yes, this is still an issue. Skip to content Ignore Learn more Please note that GitHub no longer supports old versions of Firefox. So when we assign the string 'APIKEY' to varible key ,it doesn't actually work .And what happened when we run these code and get a correct return in Codecademy ? compression_opts - Parameters for compression filter.

share|improve this answer edited Jan 23 '14 at 22:19 answered Jan 23 '14 at 22:13 detly 77058 Isn't this kind of the same problem though? return name >>> group.visit(find_foo) u'some/subgroup/foo' visititems(callable)¶ Recursively visit all objects in this group and subgroups. bryan-lunt commented Feb 12, 2016 @erlizhou It was definitely a non-existant file.