Built-in methods for using Help to view a class of objects in Python

Source: Internet
Author: User

There are different methods for different types of objects in Python, so how do you see the methods of an object of a type? We can use the Help () function

Use Help (), the type of the object that is written in parentheses. For example, how to view data types:

Help (int)

 |  methods defined here: |   |  __abs__ (...)  |      x.__abs__ ()  <==> abs (x)  |   |   __add__ (...)  |      x.__add__ (y)  <==> x+y |   |   __and__ (...)  |      x.__and__ (y)  <==> x&y |   |   __cmp__ (...)  |      x.__cmp__ (y)  <==> cmp (x, y)  |    |  __coerce__ (...)  |      x.__coerce__ (y)  <==> coerce (x, y)  |    |  __div__ (...)  |      x.__div__ (y)  <==> x/y |   |   __divmod__ (...)  |      x.__divmod__ (y)  <==> divmod(x, y)  |   |  __float__ (...)  |      x.__float__ ()  <==> float (x)  |    |  __floordiv__ (...)  |      x.__floordiv__ (y)  <==> x//y |    |  __format__ (...)  |   |  __getattribute__ (...)  |      x.__getattribute__ (' name ')  <==> x.name |    |  __getnewargs__ (...)  |   |  __hash__ (...)  |      x.__hash__ ()  <==> hash (x)  |   |   __hex__ (...)  |      x.__hex__ ()  <==> hex (x)  |   |   __index__ (...)  |      x[y:z] <==> x[y.__index__ (): z.__index__ ()] |     |  __int__ (...)  |      x.__int__ ()  <==> int (x)  |   |   __invert__ (...)  |      x.__invert__ ()  <==> ~x |   |   __long__ (...)  |      x.__long__ ()  <==> long (x)  |   |   __lshift__ (...)  |      x.__lshift__ (y)  <==> x<<y |    |  __mod__ (...)  |      x.__mod__ (y)  <==> x%y |   |   __mul__ (...)  |      x.__mul__ (y)  <==> x*y |   |   __neg__ (...)  |      x.__neg__ ()  <==> -x |   |   __nonzero__ (...)  |     &Nbsp;x.__nonzero__ ()  <==> x != 0 |   |  __oct__ (...)  |      x.__oct__ ()  <==> oct (x)  |   |   __or__ (...)  |      x.__or__ (y)  <==> x|y |   |   __pos__ (...)  |      x.__pos__ ()  <==> +x |   |   __pow__ (...)  |      x.__pow__ (Y[, z])  <==> pow (X, y[, z] )  |   |  __radd__ (...)  |      x.__radd__ (y)  <==> y+x |   |   __rand__ (...)  |      x.__rand__ (y)  <==> y&x |    |  __rdiv__ (...)  |      x.__rdiv__ (y)  <==>&nBsp;y/x |   |  __rdivmod__ (...)  |      x.__rdivmod__ (y)  <==> divmod (y, x)  |    |  __repr__ (...) &NBSP;|&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;X.__REPR__ ()  <==> repr (x)  |   |   __rfloordiv__ (...)  |      x.__rfloordiv__ (y)  <==> y//x |    |  __rlshift__ (...)  |      x.__rlshift__ (y)  <==> y<<x |    |  __rmod__ (...)  |      x.__rmod__ (y)  <==> y%x |   |   __rmul__ (...)  |      x.__rmul__ (y)  <==> y*x |   |   __ror__ (...)  |      x.__ror__ (y)  <==> y|x |    |  __rpow__ (...)  |      y.__rpow__ (X[, z])  <==> pow (x, y[, z ])  |   |  __rrshift__ (...)  |      x.__rrshift__ (y)  <==> y>>x |    |  __rshift__ (...)  |      x.__rshift__ (y)  <==> x>>y |    |  __rsub__ (...)  |      x.__rsub__ (y)  <==> y-x |   |   __rtruediv__ (...)  |      x.__rtruediv__ (y)  <==> y/x |    |  __rxor__ (...)  |      x.__rxor__ (y)  <==> y^x |   |   __str__ (...) &NBSP;|&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;X.__STR__ ()  <==> str (x)  |   |    __sub__ (...)  |      x.__sub__ (y)  <==> x-y |   |   __truediv__ (...)  |      x.__truediv__ (y)  <==> x/y |   |   __trunc__ (...)  |      truncating an integral returns itself. |    |  __xor__ (...)  |      x.__xor__ (y)  <==> x^y |   |   bit_length (...)  |      int.bit_length ()  -> int |        |      Number of bits necessary to  Represent self in binary. |      >>> bin (37)  |       ' 0b100101 '  |      >>>  (Panax Notoginseng) bit_length ()  |      6 | 

Like __add__ (...) This is a python built-in method that has two underscores before and after.

x.__add__ (y) <==> x+y means x.__add__ (y) and x+y are the same


For example:

>>> x=1>>> y=2>>> x.__add__ (y) 3>>> x+y3



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Built-in methods for using Help to view a class of objects in Python

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