Refactor PandasDtype

environment.yml

@@ -16,6 +16,7 @@ dependencies:
   - pyyaml >=5.1
   - typing_inspect >= 0.6.0
   - typing_extensions >= 3.7.4.3
+  - frictionless
 
   # testing and dependencies
   - black >= 20.8b1

noxfile.py

@@ -180,6 +180,9 @@ def install_extras(
         for spec in REQUIRES[extra].values()
         if spec not in ALWAYS_USE_PIP
     ]
+    if extra == "core":
+        specs.append(REQUIRES["all"]["hypothesis"])
+
     session.install(*ALWAYS_USE_PIP)
     if (
         isinstance(session.virtualenv, nox.virtualenv.CondaEnv)

pandera/__init__.py

@@ -1,4 +1,45 @@
 """A flexible and expressive pandas validation library."""
+from pandera.dtypes_ import (
+    Bool,
+    Category,
+    Complex,
+    Complex64,
+    Complex128,
+    Complex256,
+    DataType,
+    DateTime,
+    Float,
+    Float16,
+    Float32,
+    Float64,
+    Float128,
+    Int,
+    Int8,
+    Int16,
+    Int32,
+    Int64,
+    String,
+    Timedelta,
+    Timestamp,
+    UInt,
+    UInt8,
+    UInt16,
+    UInt32,
+    UInt64,
+)
+from pandera.engines.numpy_engine import Object
+from pandera.engines.pandas_engine import (
+    BOOL,
+    INT8,
+    INT16,
+    INT32,
+    INT64,
+    STRING,
+    UINT8,
+    UINT16,
+    UINT32,
+    UINT64,
+)
 
 from . import constants, errors, pandas_accessor
 from .checks import Check
@@ -11,33 +52,3 @@
 from .schema_inference import infer_schema
 from .schemas import DataFrameSchema, SeriesSchema
 from .version import __version__
-
-# pylint: disable=invalid-name
-Bool = PandasDtype.Bool
-DateTime = PandasDtype.DateTime
-Category = PandasDtype.Category
-Float = PandasDtype.Float
-Float16 = PandasDtype.Float16
-Float32 = PandasDtype.Float32
-Float64 = PandasDtype.Float64
-Int = PandasDtype.Int
-Int8 = PandasDtype.Int8
-Int16 = PandasDtype.Int16
-Int32 = PandasDtype.Int32
-Int64 = PandasDtype.Int64
-UInt8 = PandasDtype.UInt8
-UInt16 = PandasDtype.UInt16
-UInt32 = PandasDtype.UInt32
-UInt64 = PandasDtype.UInt64
-INT8 = PandasDtype.INT8
-INT16 = PandasDtype.INT16
-INT32 = PandasDtype.INT32
-INT64 = PandasDtype.INT64
-UINT8 = PandasDtype.UINT8
-UINT16 = PandasDtype.UINT16
-UINT32 = PandasDtype.UINT32
-UINT64 = PandasDtype.UINT64
-Object = PandasDtype.Object
-String = PandasDtype.String
-STRING = PandasDtype.STRING
-Timedelta = PandasDtype.Timedelta