python Programming Glossary: actWhy are slice and range upper-bound exclusive? http://stackoverflow.com/questions/11364533/why-are-slice-and-range-upper-bound-exclusive has a few useful properties word 2 # The first two characters word 2 # Everything except the first two characters Here.. characters word 2 # Everything except the first two characters Here 䏭 a useful invariant of slice operations s i s i equals..
Python list doesn't reflect variable change http://stackoverflow.com/questions/12080552/python-list-doesnt-reflect-variable-change to a completely new string. Most things in python can act like balloons. Integers strings lists functions instances classes..
Accessing class variables from a list comprehension in the class definition http://stackoverflow.com/questions/13905741/accessing-class-variables-from-a-list-comprehension-in-the-class-definition or generator expressions enclosed in that scope they act as if that scope does not exist. In Python 2 list comprehensions.. more detail than you ever wanted You can see this all in action using the dis module . I'm using Python 3.3 in the following.. 2 .co_freevars # Refers to `x` in foo 'x' foo .y 2 The actual referencing looks the value up from the current frame data..
Difference between __str__ and __repr__ in Python http://stackoverflow.com/questions/1436703/difference-between-str-and-repr-in-python in this case having a default for __repr__ which would act like return s r self.__class__ self.__dict__ would have been.. that r self.this self.that . It does not mean that you can actually construct MyClass or that those are the right constructor.. not s . You always want to use repr or r formatting character equivalently inside __repr__ implementation or you 胩e defeating..
What is the reason for having '//' in Python? http://stackoverflow.com/questions/1535596/what-is-the-reason-for-having-in-python is 3. When I mess around with in IPython it seems to act just like a division sign i.e. one forward slash . I was just..
http://stackoverflow.com/questions/1746613/bitwise-operation-and-usage but not the other two. Also what are bitwise operators actually used for I'd appreciate some examples. Thanks python binary.. of its inputs are 1 otherwise it's 0. XOR is 1 only if exactly one of its inputs are 1 otherwise it's 0. NOT is 1 only if.. 9 0000 1001 The zero bits in 15 in that case effectively act as a filter forcing the bits in the result to be zero as well...
Python: check if an object is a list or tuple (but not string) http://stackoverflow.com/questions/1835018/python-check-if-an-object-is-a-list-or-tuple-but-not-string the target function does for x in lst assuming that lst is actually a list or tuple . assert isinstance lst list tuple My question.. question I think assert not isinstance lst basestring Is actually what you want otherwise you'll miss out on a lot of things.. want otherwise you'll miss out on a lot of things which act like lists but aren't subclasses of list or tuple . share improve..
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 do attribute references act like this with Python inheritance The following seems strange....
http://stackoverflow.com/questions/2447353/getattr-on-a-module one or the other. Update From Guido van Rossum There is actually a hack that is occasionally used and recommended a module.. __name__ Foo This works because the import machinery is actively enabling this hack and as its final step pulls the actual.. enabling this hack and as its final step pulls the actual module out of sys.modules after loading it. This is no accident...
writing to existing workbook using xlwt http://stackoverflow.com/questions/2725852/writing-to-existing-workbook-using-xlwt The XLS file structure is complicated and doesn't act like a database to which you can append rows in a table of your..
http://stackoverflow.com/questions/3045556/how-to-profile-my-code that is the probability that you will catch it in the act on each sample. So that is roughly the percentage of samples.. They will also say it only works on toy programs when actually it works on any program and it seems to work better on..
Can I run a Python script as a service (in Windows)? How? http://stackoverflow.com/questions/32404/can-i-run-a-python-script-as-a-service-in-windows-how stored in a database. I want one of the programs to act as a service which provides a higher level interface for operations..
Why are scripting languages (e.g. Perl, Python, Ruby) not suitable as shell languages? [closed] http://stackoverflow.com/questions/3637668/why-are-scripting-languages-e-g-perl-python-ruby-not-suitable-as-shell-lang languages. So the comparison is not about the characteristics of various interactive REPL environments such as history.. is not about the characteristics of various interactive REPL environments such as history and command line substitution... programs Bash Co. are designed to scale down to 10 character programs. In Bash Co. files directories file descriptors processes..
What is the difference between LIST.append(1) and LIST = LIST + [1] (Python) http://stackoverflow.com/questions/3638486/what-is-the-difference-between-list-append1-and-list-list-1-python and LIST LIST 1 Python When I execute I'm using the interactive shell these statements I get this L 1 2 3 K L L.append 4.. L 1 2 3 K L L.append 4 L 1 2 3 4 K 1 2 3 4 But when I do exactly the same thing replacing L.append 4 with L L 4 I get L 1 2.. does this happen Another funny thing I noticed is that L 4 acts like .append which is odd as I thought it would act like L..
Django Admin - Disable the 'Add' action for a specific model http://stackoverflow.com/questions/4143886/django-admin-disable-the-add-action-for-a-specific-model Admin Disable the 'Add' action for a specific model I have a django site with lots of models.. validation and custom querysets. Hence the add model action depends on forms that need other things and the 'add model'.. view. Django admin provides a way to disable admin actions http docs.djangoproject.com en dev ref contrib admin actions..
Python 2 vs Python 3 and Tutorial [closed] http://stackoverflow.com/questions/442352/python-2-vs-python-3-and-tutorial
Why is parenthesis in print voluntary in Python 2.7? http://stackoverflow.com/questions/6182964/why-is-parenthesis-in-print-voluntary-in-python-2-7 2.7 share improve this question In Python 2.x print is actually a special statement not a function . This is also why it.. special treatment of the print statement enables it to act differently if there is a trailing or not. Happy coding. This..
Getting realtime output using subprocess http://stackoverflow.com/questions/803265/getting-realtime-output-using-subprocess use stdout PIPE then read each line as it came in and act on it accordingly. However when I ran the following code the..
How to recognize whether a script is running on a tty? http://stackoverflow.com/questions/858623/how-to-recognize-whether-a-script-is-running-on-a-tty a script is running on a tty I would like my script to act differently in an interactive shell session and when running.. tty I would like my script to act differently in an interactive shell session and when running with redirected stdout for.. grep color auto highlights matches when running in interactive shell but doesn't when piped to something else. python shell..
Python Library/Framework for writing P2P applications http://stackoverflow.com/questions/963305/python-library-framework-for-writing-p2p-applications user to user communication over the internet. It abstracts the P2P and NAT traversal out so your app can act normally.. It abstracts the P2P and NAT traversal out so your app can act normally and not be a P2P app. Similarly there was an old P2P..
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