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Exiting from python Command Line

...e exit in the command line, it finds the variable with that name and calls __repr__ (or __str__) on it. Usually, you'd get a result like: <function exit at 0x00B97FB0> But they decided to redefine that function for the exit object to display a helpful message instead. Whether or not that's ...
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Does Python have a string 'contains' substring method?

... Under the hood, Python will use __contains__(self, item), __iter__(self), and __getitem__(self, key) in that order to determine whether an item lies in a given contains. Implement at least one of those methods to make in available to your custom type. ...
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Lodash - difference between .extend() / .assign() and .merge()

... An important difference seems to be that while _.merge returns a new merged object, _.extend mutates the destination object in-place, – letronje Feb 13 '15 at 9:31 ...
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How to serialize SqlAlchemy result to JSON?

...(json.JSONEncoder): def default(self, obj): if isinstance(obj.__class__, DeclarativeMeta): # an SQLAlchemy class fields = {} for field in [x for x in dir(obj) if not x.startswith('_') and x != 'metadata']: data = obj.__getattribute__(f...
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How to run code when a class is subclassed? [duplicate]

...on2 you would define the metaclass of a class with class SuperClass: __metaclass__ = Watcher where Watcher is a subclass of type. In Python3 the syntax has been changed to class SuperClass(metaclass=Watcher) Both are equivalent to Superclass = Watcher(name, bases, clsdict) where in t...
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How to save all the variables in the current python session?

...r work: import shelve T='Hiya' val=[1,2,3] filename='/tmp/shelve.out' my_shelf = shelve.open(filename,'n') # 'n' for new for key in dir(): try: my_shelf[key] = globals()[key] except TypeError: # # __builtins__, my_shelf, and imported modules can not be shelved. ...
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Difference between String replace() and replaceAll()

...1 Replace all occurrences of the character x with o. String myString = "__x___x___x_x____xx_"; char oldChar = 'x'; char newChar = 'o'; String newString = myString.replace(oldChar, newChar); // __o___o___o_o____oo_ Example 2 Replace all occurrences of the string fish with sheep. String mySt...
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BSS段、数据段、代码段、堆与栈 剖析 - C/C++ - 清泛网 - 专注C/C++及内核技术

...下其各自的.asm,发现在程序1.asm 中ar 的定义如下: _BSS SEGMENT ?ar@@3PAHA DD 0493e0H DUP (?) ; ar _BSS ENDS 而在程序2.asm 中,ar 被定义为: _DATASEGMENT ?ar@@3PAHA DD 01H ; ar DD 02H DD 03H ORG $+1199988 _DATAENDS 区别很明显,一个位于.bss 段...
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How to determine a Python variable's type?

... It is so simple. You do it like this. print(type(variable_name)) share | improve this answer | follow | ...
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assertEquals vs. assertEqual in python

...as been deprecated as well: Method Name | Deprecated alias(es) _________________________________________________________ assertEqual() | failUnlessEqual, assertEquals From 25.3.7.1.1. Deprecated aliases ...