fixes #663

.github/CONTRIBUTING.md

@@ -67,6 +67,18 @@ pytest tests
 make docs
 ```
 
+
+#### Adding New Dependencies
+
+To add new dependencies to the project, make sure to alter the *environment.yml* file. Then to sync the dependencies from the *environment.yml* file to the *requirements-dev.txt* run the following command
+
+```
+python scripts/generate_pip_deps_from_conda.py
+
+```
+Moreover to add new dependecies in setup.py, it is necessary to add it to the **_extras_require** dictionary.
+
+
 #### Set up `pre-commit`
 
 This project uses [pre-commit](https://pre-commit.com/) to ensure that code

.pre-commit-config.yaml

@@ -35,7 +35,7 @@ repos:
         - id: flynt
 
   - repo: https://github.com/psf/black
-    rev: 21.9b0
+    rev: 21.12b0
     hooks:
       - id: black
         args: ["--line-length=79"]

environment.yml

@@ -33,7 +33,7 @@ dependencies:
   - distributed
 
   # testing and dependencies
-  - black >= 20.8b1
+  - black >= 21.12b0
 
   # testing
   - isort >= 5.7.0

pandera/engines/engine.py

@@ -42,7 +42,6 @@ def register(
         ) -> Callable[[Any], DataType]:
             """Register a new implementation for the given cls."""
 
-
 else:
     Dispatch = Callable[[Any], DataType]
 

pandera/engines/numpy_engine.py

@@ -254,7 +254,6 @@ class Float64(Float128):
         type = np.dtype("float64")
         bit_width: int = 64
 
-
 else:
 
     @Engine.register_dtype(equivalents=_float_equivalents[64])
@@ -304,7 +303,6 @@ class Complex128(Complex256):
         type = np.dtype("complex128")  # type: ignore
         bit_width: int = 128
 
-
 else:
 
     @Engine.register_dtype(equivalents=_complex_equivalents[128])

pandera/engines/pandas_engine.py

@@ -427,7 +427,6 @@ def from_parametrized_dtype(cls, pd_dtype: pd.StringDtype):
         def __str__(self) -> str:
             return repr(self.type)
 
-
 else:
 
     @Engine.register_dtype(

requirements-dev.txt

@@ -20,7 +20,7 @@ pyspark
 modin
 dask
 distributed
-black >= 20.8b1
+black >= 21.12b0
 isort >= 5.7.0
 codecov
 mypy >= 0.902

tests/core/test_typing.py

@@ -316,7 +316,6 @@ class SchemaAnnotatedDatetimeTZDtype(pa.SchemaModel):
     class SchemaAnnotatedIntervalDtype(pa.SchemaModel):
         col: Series[Annotated[pd.IntervalDtype, "int32", "both"]]
 
-
 else:
 
     class SchemaAnnotatedIntervalDtype(pa.SchemaModel):  # type: ignore