How to determine the data type of a variable in Python

Mport Types
Type (x) is types. Inttype # determine if int type
Type (x) is types. StringType #是否string类型
.........

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Super disgusting pattern, don't remember types. StringType

Import types
Type (x) = = types (1) # Determine if int type
Type (x) = = Type (' a ') #是否string类型

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Using inline functions:

• isi Nstance   (

  object, ClassInfo  )

• Return true if the  Object  argument is an instance of the  ClassInfo   argument, or of a (direct or indirect) subclass thereof. Also return True if  classinfo  is a type object and  Object  is An object of that T Ype. if  object is not a class instance or an object of the given type, and the function always returns FALSE. if  ClassInfo  is Neither a class object nor a type object, it may be a tuple of class or type objects, Or may recursively contain other such tuples (other sequence types is not accepted). if  ClassInfo  is not a class, type, or tuple of classes, types, and such tuples, a typeerror  exception is Raised. changed in version 2.2:support for a Tuple of type information was added.

Python can get the type of an object, using the type function:

>>>lst = [1, 2, 3]
>>>type (LST)
<type ' list ' >

Furthermore, you can use the Isinstance function to determine whether an object is a known type.

Isinstance is described below:

Isinstance (object, class-or-type-or-tuple), BOOL

Return whether an object are an instance of a class or of a subclass thereof.
With a type as second argument, return whether this is the object ' s type.
the form using a tuple, isinstance (x, (A, B, ...)), is a shortcut for
Isinstance (x, A) or isinstance (x, B) or ... (etc.).

Its first argument is an object, and the second is a list of type names or type names. Its return value is a Boolean type. Returns true if the type of the object is the same as the type of parameter two. If parameter two is a tuple, returns true if the object type is the same as one of the type names in the tuple.

>>>isinstance (LST, list)
Trueisinstance (LST, (int, str, list))
True

>>>isinstance (LST, (int, str, list))
True

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How to determine the data type of a variable in Python