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python Programming Glossary: parameterWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python you can add attributes to it you can pass it as a function parameter e.g. print ObjectCreator # you can print a class because it's.. print o ... echo ObjectCreator # you can pass a class as a parameter class '__main__.ObjectCreator' print hasattr ObjectCreator 'new_attribute'.. on the fly. type can take the description of a class as parameters and return a class. I know it's silly that the same function..
What do (lambda) function closures capture in Python? http://stackoverflow.com/questions/2295290/what-do-lambda-function-closures-capture-in-python The last line calls the second lambda function with 3 as a parameter. To my surprise the output was 6 I expected a 4. My reasoning..
How can I use a DLL from Python http://stackoverflow.com/questions/252417/how-can-i-use-a-dll-from-python ctypes.WinDLL c PComm ehlapi32.dll # Set up prototype and parameters for the desired function call. # HLLAPI hllApiProto ctypes.WINFUNCTYPE.. EHLLAPI sends the return code back through the fourth parameter a pointer to an int so while I specify int as the return type.. is a function prototype but you still have to set up more parameter information over and above the types . Each tuple in hllApiParams..
http://stackoverflow.com/questions/2709821/python-self-explained why it explicitly needs to be added to every function as a parameter. To illustrate in Ruby I can do this class myClass def myFunc.. automatically but not received automatically the first parameter of methods is the instance the method is called on. That makes..
What does ** (double star) and * (star) do for python parameters? http://stackoverflow.com/questions/36901/what-does-double-star-and-star-do-for-python-parameters does double star and star do for python parameters In the following method calls what does the and do for param2.. Python documentation. The args will give you all function parameters a list In 1 def foo args ... for a in args ... print a ..... arguments except for those corresponding to a formal parameter as a dictionary. In 5 def bar kwargs ... for a in kwargs .....
JSON datetime between Python and JavaScript http://stackoverflow.com/questions/455580/json-datetime-between-python-and-javascript share improve this question You can add the 'default' parameter to json.dumps to handle this dthandler lambda obj obj.isoformat..
Django Passing Custom Form Parameters to Formset http://stackoverflow.com/questions/622982/django-passing-custom-form-parameters-to-formset and then called Python magically adds self as the first parameter of the call so each form instance is incorrectly passed the.. is incorrectly passed the formset object as its first parameter. But the form class is expecting a data dictionary as its first.. the form class is expecting a data dictionary as its first parameter and when it tried to access the formset object as a dictionary..
Python __init__ and self what do they do? http://stackoverflow.com/questions/625083/python-init-and-self-what-do-they-do Most object oriented languages pass this as a hidden parameter to the methods defined on an object Python does not. You have.. creates an object for you and passes it as the first parameter to the __init__ method. Any additional parameters e.g. A 24.. the first parameter to the __init__ method. Any additional parameters e.g. A 24 'Hello' will also get passed as arguments in this..
Python: How do I pass a variable by reference? http://stackoverflow.com/questions/986006/python-how-do-i-pass-a-variable-by-reference The Python documentation seems unclear about whether parameters are passed by reference or value and the following code produces.. reason people are confused by the behaviour is twofold the parameter passed in is actually a reference to a variable but the reference.. after outer_list 'one' 'two' 'three' 'four' Since the parameter passed in is a reference to outer_list not a copy of it we can..
Obtain Latitude and Longitude from a GeoTIFF File http://stackoverflow.com/questions/2922532/obtain-latitude-and-longitude-from-a-geotiff-file degree 0.0174532925199433 PROJECTION Transverse_Mercator PARAMETER latitude_of_origin 0 PARAMETER central_meridian 117 PARAMETER.. Transverse_Mercator PARAMETER latitude_of_origin 0 PARAMETER central_meridian 117 PARAMETER scale_factor 0.9996 PARAMETER.. latitude_of_origin 0 PARAMETER central_meridian 117 PARAMETER scale_factor 0.9996 PARAMETER false_easting 500000 PARAMETER..
Parameter substitution for a SQLite “IN” clause http://stackoverflow.com/questions/1309989/parameter-substitution-for-a-sqlite-in-clause substitution for a SQLite &ldquo IN&rdquo clause I am trying..
Aligning DataFrames with same columns, different index levels http://stackoverflow.com/questions/13940753/aligning-dataframes-with-same-columns-different-index-levels columns. concentration has a MultiIndex on Land Use and Parameter . import pandas import StringIO conc_string StringIO.StringIO.. import StringIO conc_string StringIO.StringIO Land Use Parameter 1E 1N 1S 2 Airfield BOD5 mg l 0.418 0.118 0.226 1.063 Airfield.. to do is divide all of the concentrations independent of Parameter by the weights where the basin column names and Land Use . I'm..
how to print number with commas as thousands separators in Python 2.x http://stackoverflow.com/questions/1823058/how-to-print-number-with-commas-as-thousands-separators-in-python-2-x x if type x not in type 0 type 0L raise TypeError Parameter must be an integer. if x 0 return ' ' intWithCommas x result..
Why the “mutable default argument fix” syntax is so ugly, asks python newbie http://stackoverflow.com/questions/2639915/why-the-mutable-default-argument-fix-syntax-is-so-ugly-asks-python-newbie languages have variables and scroll down to Default Parameter Values . There you can find the following def bad_append new_item..
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