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python Programming Glossary: keyerrorCommon pitfalls in Python [duplicate] http://stackoverflow.com/questions/1011431/common-pitfalls-in-python 3 Be careful catching multiple exception types try raise KeyError hmm bug except KeyError TypeError print TypeError This prints.. multiple exception types try raise KeyError hmm bug except KeyError TypeError print TypeError This prints hmm bug though it is not.. exceptions of both types but instead we are catching KeyError only as variable TypeError use this instead try raise KeyError..
http://stackoverflow.com/questions/1151658/python-hashable-dicts d1 h1 'salad' d1 h2 Traceback most recent call last ... KeyError hashdict bananas 3 mangoes 5 based on answers from http stackoverflow.com..
Python: Change values in dict of nested dicts using items in a list http://stackoverflow.com/questions/11918852/python-change-values-in-dict-of-nested-dicts-using-items-in-a-list are of correct type for key in keys try val d key except KeyError val d key default_factory else if not isinstance val MutableMapping..
How to encode UTF8 filename for HTTP headers? (Python, Django) http://stackoverflow.com/questions/1361604/how-to-encode-utf8-filename-for-http-headers-python-django target os. I've already tried urllib.quote but it raises KeyError exception. Possibly I'm doing something wrong but maybe it's..
http://stackoverflow.com/questions/1456373/two-way-reverse-map most recent call last File stdin line 1 in module KeyError 'bar' I'm sure I didn't cover all the cases but that should..
Why do attribute references act like this with Python inheritance? http://stackoverflow.com/questions/206734/why-do-attribute-references-act-like-this-with-python-inheritance cls v1 v2 v3 try return cls.__insts__ v1 v2 v3 except KeyError return cls.__insts__.setdefault v1 v2 v3 object.__new__ cls..
Programmatically getting an access token for using the Facebook Graph API http://stackoverflow.com/questions/3058723/programmatically-getting-an-access-token-for-using-the-facebook-graph-api str oauth_response 'access_token' 0 except KeyError print 'Unable to grab an access token ' exit facebook_graph..
How can I represent an 'Enum' in Python? http://stackoverflow.com/questions/36932/how-can-i-represent-an-enum-in-python useful for rendering your enums in output. It will throw KeyError if the reverse mapping doesn't exist. With the first example..
What is the best (idiomatic) way to check the type of a Python variable? [duplicate] http://stackoverflow.com/questions/378927/what-is-the-best-idiomatic-way-to-check-the-type-of-a-python-variable t list set t.values try return cases type x x except KeyError return None If isinstance is prefered how would you write this..
how do i rewrite this function to implement OrderedDict? http://stackoverflow.com/questions/4126348/how-do-i-rewrite-this-function-to-implement-ordereddict __missing__ self key if self.default_factory is None raise KeyError key self key default self.default_factory return default def..
Check if a given index already exists in a dictionary and increment it http://stackoverflow.com/questions/473099/check-if-a-given-index-already-exists-in-a-dictionary-and-increment-it given key you will not get None when accessing the dict a KeyError will be raised. So if you want to use a regular dict instead..
Accessing dict keys like an attribute in Python? http://stackoverflow.com/questions/4984647/accessing-dict-keys-like-an-attribute-in-python as an attribute correctly raises AttributeError instead of KeyError Cons For the non initiated it seems like pure magic. Causes..
Can I do an ordered, default dict in Python http://stackoverflow.com/questions/6190331/can-i-do-an-ordered-default-dict-in-python key try return OrderedDict.__getitem__ self key except KeyError return self.__missing__ key def __missing__ self key if self.default_factory.. __missing__ self key if self.default_factory is None raise KeyError key self key value self.default_factory return value def __reduce__..
What is the best way to implement nested dictionaries in Python? http://stackoverflow.com/questions/635483/what-is-the-best-way-to-implement-nested-dictionaries-in-python self item try return dict.__getitem__ self item except KeyError value self item type self return value Testing a AutoVivification..
What's the best way to initialize a dict of dicts in Python? [duplicate] http://stackoverflow.com/questions/651794/whats-the-best-way-to-initialize-a-dict-of-dicts-in-python self item try return dict.__getitem__ self item except KeyError value self item type self return value Testing a AutoVivification..
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