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  • Dive in python Chapter4 实例

    def info(object,spacing=10,collapse=1):
    """Print methods and doc strings.

    Takes modules,class,list,dictionary,or string."""

    methodList = [method for method in dir(object) if callable(getattr(object,method))]
    processFunc=collapse and (lambda s:" ".join(s.split())) or (lambda s: s)
    print " ".join(["%s %s" %
    (method.ljust(spacing),
    processFunc(str(getattr(object,method).__doc__)))
    for method in methodList])

    if __name__=="__main__":
    print info.__doc__

    此函数的作用可以用来输出对应对象的操作方法:>>> from apihelper import inf>>> li=[]

    >>> from apihelper import info
    >>> li=[]
    >>> info(li)
    __add__ x.__add__(y) <==> x+y
    __class__ list() -> new empty list list(iterable) -> new list initialized from
    iterable's items
    __contains__ x.__contains__(y) <==> y in x
    __delattr__ x.__delattr__('name') <==> del x.name
    __delitem__ x.__delitem__(y) <==> del x[y]
    __delslice__ x.__delslice__(i, j) <==> del x[i:j] Use of negative indices is not
    supported.
    __eq__ x.__eq__(y) <==> x==y
    __format__ default object formatter
    __ge__ x.__ge__(y) <==> x>=y
    __getattribute__ x.__getattribute__('name') <==> x.name
    __getitem__ x.__getitem__(y) <==> x[y]
    __getslice__ x.__getslice__(i, j) <==> x[i:j] Use of negative indices is not sup
    ported.
    __gt__ x.__gt__(y) <==> x>y
    __iadd__ x.__iadd__(y) <==> x+=y
    __imul__ x.__imul__(y) <==> x*=y
    __init__ x.__init__(...) initializes x; see help(type(x)) for signature
    __iter__ x.__iter__() <==> iter(x)
    __le__ x.__le__(y) <==> x<=y
    __len__ x.__len__() <==> len(x)
    __lt__ x.__lt__(y) <==> x<y
    __mul__ x.__mul__(n) <==> x*n
    __ne__ x.__ne__(y) <==> x!=y
    __new__ T.__new__(S, ...) -> a new object with type S, a subtype of T
    __reduce__ helper for pickle
    __reduce_ex__ helper for pickle
    __repr__ x.__repr__() <==> repr(x)
    __reversed__ L.__reversed__() -- return a reverse iterator over the list
    __rmul__ x.__rmul__(n) <==> n*x
    __setattr__ x.__setattr__('name', value) <==> x.name = value
    __setitem__ x.__setitem__(i, y) <==> x[i]=y
    __setslice__ x.__setslice__(i, j, y) <==> x[i:j]=y Use of negative indices is no
    t supported.
    __sizeof__ L.__sizeof__() -- size of L in memory, in bytes
    __str__ x.__str__() <==> str(x)
    __subclasshook__ Abstract classes can override this to customize issubclass(). T
    his is invoked early on by abc.ABCMeta.__subclasscheck__(). It should return Tru
    e, False or NotImplemented. If it returns NotImplemented, the normal algorithm i
    s used. Otherwise, it overrides the normal algorithm (and the outcome is cached)
    .
    append L.append(object) -- append object to end
    count L.count(value) -> integer -- return number of occurrences of value
    extend L.extend(iterable) -- extend list by appending elements from the iter
    able
    index L.index(value, [start, [stop]]) -> integer -- return first index of v
    alue. Raises ValueError if the value is not present.
    insert L.insert(index, object) -- insert object before index
    pop L.pop([index]) -> item -- remove and return item at index (default la
    st). Raises IndexError if list is empty or index is out of range.
    remove L.remove(value) -- remove first occurrence of value. Raises ValueErro
    r if the value is not present.
    reverse L.reverse() -- reverse *IN PLACE*
    sort L.sort(cmp=None, key=None, reverse=False) -- stable sort *IN PLACE*;
    cmp(x, y) -> -1, 0, 1

     

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  • 原文地址:https://www.cnblogs.com/sfnz/p/5983801.html
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