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-rw-r--r--python/pyspark/sql/types.py18
1 files changed, 16 insertions, 2 deletions
diff --git a/python/pyspark/sql/types.py b/python/pyspark/sql/types.py
index 9e7e9f04bc..b6ec6137c9 100644
--- a/python/pyspark/sql/types.py
+++ b/python/pyspark/sql/types.py
@@ -97,8 +97,6 @@ class AtomicType(DataType):
"""An internal type used to represent everything that is not
null, UDTs, arrays, structs, and maps."""
- __metaclass__ = DataTypeSingleton
-
class NumericType(AtomicType):
"""Numeric data types.
@@ -109,6 +107,8 @@ class IntegralType(NumericType):
"""Integral data types.
"""
+ __metaclass__ = DataTypeSingleton
+
class FractionalType(NumericType):
"""Fractional data types.
@@ -119,26 +119,36 @@ class StringType(AtomicType):
"""String data type.
"""
+ __metaclass__ = DataTypeSingleton
+
class BinaryType(AtomicType):
"""Binary (byte array) data type.
"""
+ __metaclass__ = DataTypeSingleton
+
class BooleanType(AtomicType):
"""Boolean data type.
"""
+ __metaclass__ = DataTypeSingleton
+
class DateType(AtomicType):
"""Date (datetime.date) data type.
"""
+ __metaclass__ = DataTypeSingleton
+
class TimestampType(AtomicType):
"""Timestamp (datetime.datetime) data type.
"""
+ __metaclass__ = DataTypeSingleton
+
class DecimalType(FractionalType):
"""Decimal (decimal.Decimal) data type.
@@ -172,11 +182,15 @@ class DoubleType(FractionalType):
"""Double data type, representing double precision floats.
"""
+ __metaclass__ = DataTypeSingleton
+
class FloatType(FractionalType):
"""Float data type, representing single precision floats.
"""
+ __metaclass__ = DataTypeSingleton
+
class ByteType(IntegralType):
"""Byte data type, i.e. a signed integer in a single byte.