python 判斷資料型別
阿新 • • 發佈:2019-02-04
Python 判斷資料型別有type和isinstance
基本區別在於:
type():不會認為子類是父類
isinstance():會認為子類是父類型別
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class Color( object ):
pass
class Red(Color):
pass
print type (Color()) = = Color
print type (Red()) = = Color
print isinstance (Red(),Color)
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執行結果如下:
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D:\software\Python2. 7.13 \python.exe
C: / Users / Administrator / PycharmProjects / PythonStudy / test.py
True
False
True
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用isinstance判斷mongDB中的一些資料型別:
- 字串、int、long、float - isinstance(data, (int, str, types.LongType, float))
- 時間型別 - isinstance(data, datetime.datetime)
- 布林型別 - isinstance(data, (bool))
- 字典型別 - isinstance(data, (dict))
- 陣列 - isinstance(data, (list))
- unicode - isinstance(data, unicode)
- mongo obJect - isinstance(data, bson.objectid.ObjectId)
可以引入types模板,獲取資料型別:
inport types
types取值:
BooleanType
BufferType
BuiltinFunctionType
BuiltinMethodType
ClassType
CodeType
ComplexType
DictProxyType
DictType
DictionaryType
EllipsisType
FileType
FloatType
FrameType
FunctionType
GeneratorType
GetSetDescriptorType
InstanceType
IntType
LambdaType
ListType
LongType
MemberDescriptorType
MethodType
ModuleType
NoneType
NotImplementedType
ObjectType
SliceType
StringType
StringTypes
TracebackType
TupleType
TypeType
UnboundMethodType
UnicodeType
XRangeType