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In [13]: open?

Type:           builtin_function_or_method

Base Class:     <type 'builtin_function_or_method'>

String Form:    <built­in function open>

Namespace:      Python builtin

Docstring:

    open(name[, mode[, buffering]]) ­> file object

    Open a file using the file() type, returns a file 

object.

Constructor Docstring:

    x.__init__(...) initializes x; see 

x.__class__.__doc__ for signature