Partial implementation of hist - does not work

Backup push

eland/__init__.py

@@ -10,6 +10,7 @@ from .mappings import *
 from .query import *
 from .operations import *
 from .query_compiler import *
+from .plotting import *
 from .ndframe import *
 from .series import *
 from .dataframe import *

eland/dataframe.py

@@ -1,9 +1,9 @@
-import warnings
 import sys
+import warnings
 
-import pandas as pd
 import numpy as np
-
+import pandas as pd
+from distutils.version import LooseVersion
 from pandas.compat import StringIO
 from pandas.core.common import apply_if_callable, is_bool_indexer
 from pandas.io.common import _expand_user, _stringify_path
@@ -13,7 +13,7 @@ from pandas.io.formats.printing import pprint_thing
 
 from eland import NDFrame
 from eland import Series
-
+from eland import hist_frame
 
 class DataFrame(NDFrame):
     # This is effectively 2 constructors
@@ -74,6 +74,46 @@ class DataFrame(NDFrame):
 
         return buf.getvalue()
 
+    def _info_repr(self):
+        """
+        True if the repr should show the info view.
+        """
+        info_repr_option = (pd.get_option("display.large_repr") == "info")
+        return info_repr_option and not (self._repr_fits_horizontal_() and
+                                         self._repr_fits_vertical_())
+
+    def _repr_html_(self):
+        """
+        From pandas
+        """
+        try:
+            import IPython
+        except ImportError:
+            pass
+        else:
+            if LooseVersion(IPython.__version__) < LooseVersion('3.0'):
+                if console.in_qtconsole():
+                    # 'HTML output is disabled in QtConsole'
+                    return None
+
+        if self._info_repr():
+            buf = StringIO(u(""))
+            self.info(buf=buf)
+            # need to escape the <class>, should be the first line.
+            val = buf.getvalue().replace('<', r'&lt;', 1)
+            val = val.replace('>', r'&gt;', 1)
+            return '<pre>' + val + '</pre>'
+
+        if pd.get_option("display.notebook_repr_html"):
+            max_rows = pd.get_option("display.max_rows")
+            max_cols = pd.get_option("display.max_columns")
+            show_dimensions = pd.get_option("display.show_dimensions")
+
+            return self.to_html(max_rows=max_rows, max_cols=max_cols,
+                                show_dimensions=show_dimensions, notebook=True)
+        else:
+            return None
+
     def count(self):
         """
         Count non-NA cells for each column (TODO row)
@@ -89,7 +129,6 @@ class DataFrame(NDFrame):
         """
         return self._query_compiler.count()
 
-
     def info_es(self):
         buf = StringIO()
 
@@ -222,6 +261,45 @@ class DataFrame(NDFrame):
 
         fmt.buffer_put_lines(buf, lines)
 
+    def to_html(self, buf=None, columns=None, col_space=None, header=True,
+                index=True, na_rep='NaN', formatters=None, float_format=None,
+                sparsify=None, index_names=True, justify=None, max_rows=None,
+                max_cols=None, show_dimensions=False, decimal='.',
+                bold_rows=True, classes=None, escape=True, notebook=False,
+                border=None, table_id=None, render_links=False):
+        """
+        From pandas - except we set max_rows default to avoid careless extraction of entire index
+        """
+        if max_rows is None:
+            warnings.warn("DataFrame.to_string called without max_rows set "
+                          "- this will return entire index results. "
+                          "Setting max_rows=60, overwrite if different behaviour is required.")
+            max_rows = 60
+
+        # Create a slightly bigger dataframe than display
+        df = self._build_repr_df(max_rows + 1, max_cols)
+
+        if buf is not None:
+            _buf = _expand_user(_stringify_path(buf))
+        else:
+            _buf = StringIO()
+
+        df.to_html(buf=_buf, columns=columns, col_space=col_space, header=header,
+                index=index, na_rep=na_rep, formatters=formatters, float_format=float_format,
+                sparsify=sparsify, index_names=index_names, justify=justify, max_rows=max_rows,
+                max_cols=max_cols, show_dimensions=False, decimal=decimal,
+                bold_rows=bold_rows, classes=classes, escape=escape, notebook=notebook,
+                border=border, table_id=table_id, render_links=render_links)
+
+        # Our fake dataframe has incorrect number of rows (max_rows*2+1) - write out
+        # the correct number of rows
+        if show_dimensions:
+            _buf.write("\n<p>{nrows} rows x {ncols} columns</p>"
+                       .format(nrows=len(self.index), ncols=len(self.columns)))
+
+        if buf is None:
+            result = _buf.getvalue()
+            return result
 
     def to_string(self, buf=None, columns=None, col_space=None, header=True,
                   index=True, na_rep='NaN', formatters=None, float_format=None,
@@ -238,7 +316,7 @@ class DataFrame(NDFrame):
             max_rows = 60
 
         # Create a slightly bigger dataframe than display
-        df = self._build_repr_df(max_rows+1, max_cols)
+        df = self._build_repr_df(max_rows + 1, max_cols)
 
         if buf is not None:
             _buf = _expand_user(_stringify_path(buf))
@@ -295,7 +373,6 @@ class DataFrame(NDFrame):
         if key not in self.columns:
             raise KeyError("Requested column is not in the DataFrame {}".format(key))
         s = self._reduce_dimension(self._query_compiler.getitem_column_array([key]))
-        s._parent = self
         return s
 
     def _getitem_array(self, key):
@@ -345,7 +422,7 @@ class DataFrame(NDFrame):
         if not inplace:
             return DataFrame(query_compiler=new_query_compiler)
         else:
-            self._query_compiler=new_query_compiler
+            self._query_compiler = new_query_compiler
 
     def _reduce_dimension(self, query_compiler):
         return Series(query_compiler=query_compiler)
@@ -353,7 +430,31 @@ class DataFrame(NDFrame):
     def _to_pandas(self):
         return self._query_compiler.to_pandas()
 
+    def _empty_pd_df(self):
+        return self._query_compiler._empty_pd_ef()
+
     def squeeze(self, axis=None):
         return DataFrame(
             query_compiler=self._query_compiler.squeeze(axis)
         )
+
+    @property
+    def shape(self):
+        """
+        Return a tuple representing the dimensionality of the DataFrame.
+
+        Returns
+        -------
+        shape: tuple
+            0 - number of rows
+            1 - number of columns
+        """
+        num_rows = len(self)
+        num_columns = len(self.columns)
+
+        return num_rows, num_columns
+
+    def keys(self):
+        return self.columns
+
+    hist = hist_frame

eland/index.py

@@ -53,7 +53,6 @@ class Index:
     # Make iterable
     def __next__(self):
         # TODO resolve this hack to make this 'iterable'
-        print("In Index.__next__")
         raise StopIteration()
 
     def __iter__(self):

eland/mappings.py

@@ -403,7 +403,7 @@ class Mappings:
 
         return is_source_field
 
-    def numeric_source_fields(self, columns):
+    def numeric_source_fields(self, columns, include_bool=True):
         """
         Returns
         -------

eland/ndframe.py

@@ -94,7 +94,6 @@ class NDFrame(BasePandasDataset):
         Returns:
             The value of the attribute.
         """
-        print(key)
         try:
             return object.__getattribute__(self, key)
         except AttributeError as e:
@@ -228,5 +227,26 @@ class NDFrame(BasePandasDataset):
             raise NotImplementedError("Only sum of numeric fields is implemented")
         return self._query_compiler.max()
 
+    def _hist(self, interval)
+        return self._query_compiler._hist(interval)
+
     def describe(self):
         return self._query_compiler.describe()
+
+    def get(self, key, default=None):
+        """Get item from object for given key (DataFrame column, Panel
+                slice, etc.). Returns default value if not found.
+
+                Args:
+                    key (DataFrame column, Panel slice) : the key for which value
+                    to get
+
+                Returns:
+                    value (type of items contained in object) : A value that is
+                    stored at the key
+                """
+        if key in self.keys():
+            return self.__getitem__(key)
+        else:
+            return default
+

eland/operations.py

@@ -2,6 +2,7 @@ import copy
 from enum import Enum
 
 import pandas as pd
+import numpy as np
 
 from eland import Index
 from eland import Query
@@ -126,6 +127,12 @@ class Operations:
     def min(self, query_compiler):
         return self._metric_aggs(query_compiler, 'min')
 
+    def nunique(self, query_compiler):
+        return self._terms_aggs(query_compiler, 'cardinality')
+
+    def hist(self, query_compiler, bins):
+        return self._hist_aggs(query_compiler, bins)
+
     def _metric_aggs(self, query_compiler, func):
         query_params, post_processing = self._resolve_tasks()
 
@@ -155,6 +162,73 @@ class Operations:
         # }
         results = {}
 
+        for field in numeric_source_fields:
+            results[field] = response['aggregations'][field]['value']
+
+        # Return single value if this is a series
+        if len(numeric_source_fields) == 1:
+            return np.float64(results[numeric_source_fields[0]])
+
+        s = pd.Series(data=results, index=numeric_source_fields)
+
+        return s
+
+    def _terms_aggs(self, query_compiler, func):
+        query_params, post_processing = self._resolve_tasks()
+
+        size = self._size(query_params, post_processing)
+        if size is not None:
+            raise NotImplementedError("Can not count field matches if size is set {}".format(size))
+
+        columns = self.get_columns()
+
+        numeric_source_fields = query_compiler._mappings.numeric_source_fields(columns)
+
+        body = Query(query_params['query'])
+
+        for field in numeric_source_fields:
+            body.metric_aggs(field, func, field)
+
+        response = query_compiler._client.search(
+            index=query_compiler._index_pattern,
+            size=0,
+            body=body.to_search_body())
+
+        results = {}
+
+        for field in numeric_source_fields:
+            results[field] = response['aggregations'][field]['value']
+
+        s = pd.Series(data=results, index=numeric_source_fields)
+
+        return s
+
+    def _hist_aggs(self, query_compiler, bins):
+        query_params, post_processing = self._resolve_tasks()
+
+        size = self._size(query_params, post_processing)
+        if size is not None:
+            raise NotImplementedError("Can not count field matches if size is set {}".format(size))
+
+        columns = self.get_columns()
+
+        numeric_source_fields = query_compiler._mappings.numeric_source_fields(columns)
+
+        body = Query(query_params['query'])
+
+        min_aggs = self._metric_aggs(query_compiler, 'min')
+        max_aggs = self._metric_aggs(query_compiler, 'max')
+
+        for field in numeric_source_fields:
+            body.hist_aggs(field, min_aggs, max_aggs, bins)
+
+        response = query_compiler._client.search(
+            index=query_compiler._index_pattern,
+            size=0,
+            body=body.to_search_body())
+
+        results = {}
+
         for field in numeric_source_fields:
             results[field] = response['aggregations'][field]['value']
 
@@ -181,8 +255,6 @@ class Operations:
             body.metric_aggs('extended_stats_' + field, 'extended_stats', field)
             body.metric_aggs('percentiles_' + field, 'percentiles', field)
 
-        print(body.to_search_body())
-
         response = query_compiler._client.search(
             index=query_compiler._index_pattern,
             size=0,
@@ -219,15 +291,18 @@ class Operations:
         # Only return requested columns
         columns = self.get_columns()
 
+        es_results = None
+
         # If size=None use scan not search - then post sort results when in df
         # If size>10000 use scan
         if size is not None and size <= 10000:
-            es_results = query_compiler._client.search(
-                index=query_compiler._index_pattern,
-                size=size,
-                sort=sort_params,
-                body=body.to_search_body(),
-                _source=columns)
+            if size > 0:
+                es_results = query_compiler._client.search(
+                    index=query_compiler._index_pattern,
+                    size=size,
+                    sort=sort_params,
+                    body=body.to_search_body(),
+                    _source=columns)
         else:
             es_results = query_compiler._client.scan(
                 index=query_compiler._index_pattern,

eland/plotting.py

@@ -0,0 +1,51 @@
+import numpy as np
+
+import pandas.core.common as com
+from pandas.core.dtypes.generic import (
+    ABCIndexClass)
+from pandas.plotting._core import (
+    _raise_if_no_mpl, _converter, grouped_hist, _subplots, _flatten, _set_ticks_props)
+
+
+def hist_frame(ed_df, column=None, by=None, grid=True, xlabelsize=None,
+               xrot=None, ylabelsize=None, yrot=None, ax=None, sharex=False,
+               sharey=False, figsize=None, layout=None, bins=10, **kwds):
+    """
+    Derived from pandas.plotting._core.hist_frame 0.24.2
+    """
+    # Start with empty pandas data frame derived from
+    empty_pd_df = ed_df._empty_pd_df()
+
+    _raise_if_no_mpl()
+    _converter._WARN = False
+    if by is not None:
+        axes = grouped_hist(empty_pd_df, column=column, by=by, ax=ax, grid=grid,
+                            figsize=figsize, sharex=sharex, sharey=sharey,
+                            layout=layout, bins=bins, xlabelsize=xlabelsize,
+                            xrot=xrot, ylabelsize=ylabelsize,
+                            yrot=yrot, **kwds)
+        return axes
+
+    if column is not None:
+        if not isinstance(column, (list, np.ndarray, ABCIndexClass)):
+            column = [column]
+        empty_pd_df = empty_pd_df[column]
+    data = empty_pd_df._get_numeric_data()
+    naxes = len(empty_pd_df.columns)
+
+    fig, axes = _subplots(naxes=naxes, ax=ax, squeeze=False,
+                          sharex=sharex, sharey=sharey, figsize=figsize,
+                          layout=layout)
+    _axes = _flatten(axes)
+
+    for i, col in enumerate(com.try_sort(data.columns)):
+        ax = _axes[i]
+        ax.hist(empty_pd_df[col].dropna().values, bins=bins, **kwds)
+        ax.set_title(col)
+        ax.grid(grid)
+
+    _set_ticks_props(axes, xlabelsize=xlabelsize, xrot=xrot,
+                     ylabelsize=ylabelsize, yrot=yrot)
+    fig.subplots_adjust(wspace=0.3, hspace=0.3)
+
+    return axes

eland/query.py

@@ -68,6 +68,19 @@ class Query:
         }
         self._aggs[name] = agg
 
+    def hist_aggs(self, name, field, min_aggs, max_aggs, bins):
+        """
+        Add histogram agg e.g.
+        "aggs": {
+            "name": {
+                "histogram": {
+                    "field": "AvgTicketPrice"
+                    "interval": (max_aggs[field] - min_aggs[field])/bins
+                }
+            }
+        }
+        """
+
     def to_search_body(self):
         body = {"query": self._query, "aggs": self._aggs}
         return body

eland/query_compiler.py

@@ -152,6 +152,8 @@ class ElandQueryCompiler(BaseQueryCompiler):
         TODO - an option here is to use Elasticsearch's multi-field matching instead of pandas treatment of lists (which isn't great)
         NOTE - using this lists is generally not a good way to use this API
         """
+        if results is None:
+            return self._empty_pd_ef()
 
         def flatten_dict(y):
             out = {}
@@ -257,6 +259,13 @@ class ElandQueryCompiler(BaseQueryCompiler):
         """
         return self._operations.index_matches(self, self.index.index_field, items)
 
+    def _empty_pd_ef(self):
+        # Return an empty dataframe with correct columns and dtypes
+        df = pd.DataFrame()
+        for c, d in zip(self.columns, self.dtypes):
+            df[c] = pd.Series(dtype=d)
+        return df
+
     def copy(self):
         return self.__constructor__(
             client=self._client,
@@ -348,6 +357,8 @@ class ElandQueryCompiler(BaseQueryCompiler):
         return self._operations.min(self)
     def max(self):
         return self._operations.max(self)
+    def nunique(self):
+        return self._operations.nunique(self)
 
     def info_es(self, buf):
         buf.write("index_pattern: {index_pattern}\n".format(index_pattern=self._index_pattern))
@@ -358,3 +369,6 @@ class ElandQueryCompiler(BaseQueryCompiler):
 
     def describe(self):
         return self._operations.describe(self)
+
+    def _hist(self, interval):
+        return self._operations.hist(self, interval)

eland/tests/dataframe/test_describe_pytest.py

@@ -13,6 +13,9 @@ class TestDataFrameInfo(TestData):
         pd_describe = pd_flights.describe()
         ed_describe = ed_flights.describe()
 
+        print(pd_describe)
+        print(ed_describe)
+
         # TODO - this fails now as ES aggregations are approximate
         #        if ES percentile agg uses
         #        "hdr": {

eland/tests/dataframe/test_get_pytest.py

@@ -0,0 +1,23 @@
+# File called _pytest for PyCharm compatability
+import pandas as pd
+import eland as ed
+
+from eland.tests.common import TestData
+from eland.tests.common import (
+    assert_pandas_eland_frame_equal,
+    assert_pandas_eland_series_equal
+)
+
+import numpy as np
+
+class TestDataFrameiLoc(TestData):
+
+    def test_get1(self):
+        ed_flights = self.ed_flights()
+        pd_flights = self.pd_flights()
+
+        ed_get0 = ed_flights.get('Carrier')
+        pd_get0 = pd_flights.get('Carrier')
+
+        print(ed_get0, type(ed_get0))
+        print(pd_get0, type(pd_get0))

eland/tests/dataframe/test_head_tail_pytest.py

@@ -80,3 +80,10 @@ class TestDataFrameHeadTail(TestData):
         pd_head_4 = pd_tail_5.head(4)
         assert_pandas_eland_frame_equal(pd_head_4, ed_head_4)
 
+    def test_head_0(self):
+        ed_flights = self.ed_flights()
+        pd_flights = self.pd_flights()
+
+        ed_head_0 = ed_flights.head(0)
+        pd_head_0 = pd_flights.head(0)
+        assert_pandas_eland_frame_equal(pd_head_0, ed_head_0)

eland/tests/dataframe/test_nunique_pytest.py

@@ -0,0 +1,25 @@
+# File called _pytest for PyCharm compatability
+import pandas as pd
+import eland as ed
+
+from eland.tests.common import TestData
+from eland.tests.common import (
+    assert_pandas_eland_frame_equal,
+    assert_pandas_eland_series_equal
+)
+
+import numpy as np
+
+class TestDataFrameNUnique(TestData):
+
+    def test_nunique1(self):
+        ed_ecommerce = self.ed_ecommerce()
+        pd_ecommerce = self.pd_ecommerce()
+
+        print(pd_ecommerce.dtypes)
+        print(ed_ecommerce.dtypes)
+        #ed_nunique = ed_ecommerce.nunique()
+        pd_selection = pd_ecommerce.drop(columns=['category'])
+        pd_nunique = pd_selection.nunique(axis=1)
+
+        print(pd_nunique, type(pd_nunique))

eland/tests/dataframe/test_reviews_pytest.py

@@ -0,0 +1,17 @@
+# File called _pytest for PyCharm compatability
+
+from eland.tests.common import TestData
+
+import eland as ed
+
+
+class TestDataFrameReviews(TestData):
+
+    def test_explore(self):
+        ed_reviews = ed.DataFrame('localhost', 'anonreviews')
+
+        print(ed_reviews.head())
+        print(ed_reviews.describe())
+        print(ed_reviews.info())
+        print(ed_reviews.hist(column="rating", bins = 5))
+        #print(ed_reviews.head().info_es())

eland/tests/dataframe/test_shape_pytest.py

@@ -0,0 +1,26 @@
+# File called _pytest for PyCharm compatability
+
+from eland.tests.common import TestData
+
+
+class TestDataFrameShape(TestData):
+
+    def test_to_shape1(self):
+        pd_ecommerce = self.pd_ecommerce()
+        ed_ecommerce = self.ed_ecommerce()
+
+        pd_shape = pd_ecommerce.shape
+        ed_shape = ed_ecommerce.shape
+
+        assert pd_shape == ed_shape
+
+    def test_to_shape2(self):
+        pd_flights = self.pd_flights()
+        ed_flights = self.ed_flights()
+
+        pd_shape = pd_flights.shape
+        ed_shape = ed_flights.shape
+
+        assert pd_shape == ed_shape
+
+

eland/tests/dataframe/test_utils_pytest.py

@@ -0,0 +1,44 @@
+# File called _pytest for PyCharm compatability
+
+import numpy as np
+import pandas as pd
+
+import eland as ed
+from eland.tests.common import ELASTICSEARCH_HOST
+from eland.tests.common import TestData
+
+
+class TestDataFrameUtils(TestData):
+
+    def test_generate_es_mappings(self):
+        df = pd.DataFrame(data={'A': np.random.rand(3),
+                                'B': 1,
+                                'C': 'foo',
+                                'D': pd.Timestamp('20190102'),
+                                'E': [1.0, 2.0, 3.0],
+                                'F': False,
+                                'G': [1, 2, 3]},
+                          index=['0', '1', '2'])
+
+        expected_mappings = {'mappings': {
+            'properties': {'A': {'type': 'double'},
+                           'B': {'type': 'long'},
+                           'C': {'type': 'keyword'},
+                           'D': {'type': 'date'},
+                           'E': {'type': 'double'},
+                           'F': {'type': 'boolean'},
+                           'G': {'type': 'long'}}}}
+
+        mappings = ed.Mappings._generate_es_mappings(df)
+
+        assert expected_mappings == mappings
+
+        # Now create index
+        index_name = 'eland_test_generate_es_mappings'
+
+        ed.pandas_to_es(df, ELASTICSEARCH_HOST, index_name, if_exists="replace", refresh=True)
+
+        ed_df = ed.DataFrame(ELASTICSEARCH_HOST, index_name)
+        ed_df_head = ed_df.head()
+
+        # assert_frame_equal(df, ed_df_head)

eland/tests/plotting/test_dataframe_hist_pytest.py

@@ -0,0 +1,46 @@
+# File called _pytest for PyCharm compatability
+
+from eland.tests.common import TestData
+
+from pandas.util.testing import assert_series_equal
+
+import numpy as np
+
+class TestDataFrameHist(TestData):
+
+    def test_dataframe_hist1(self):
+        test_data = TestData()
+
+        pd_flights = test_data.pd_flights()[['DistanceKilometers', 'DistanceMiles', 'FlightDelayMin', 'FlightTimeHour']]
+        ed_flights = test_data.ed_flights()[['DistanceKilometers', 'DistanceMiles', 'FlightDelayMin', 'FlightTimeHour']]
+
+        pd_flights.hist(figsize=[10, 10])
+        ed_flights.hist(figsize=[10, 10])
+
+        pd_min = pd_flights['DistanceKilometers'].min()
+        pd_max = pd_flights['DistanceKilometers'].max()
+
+        ed_min = ed_flights['DistanceKilometers'].min()
+        ed_max = ed_flights['DistanceKilometers'].max()
+
+        num_bins = 10.0
+
+        bins = np.linspace(ed_min, ed_max, num=num_bins+1)
+
+        print(bins)
+
+        print(np.diff(bins).mean())
+
+        hist = ed_flights['DistanceKilometers'].hist(np.diff(bins).mean())
+
+
+        x = [2956.,  768.,  719., 2662., 2934., 1320.,  641.,  529.,  426.,  104.]
+        bins = [0., 1988.14823146, 3976.29646292, 5964.44469437, 7952.59292583, 9940.74115729, 11928.88938875, 13917.03762021, 15905.18585166,17893.33408312,19881.48231458]
+
+        print(len(x))
+        print(len(bins))
+
+        a = bins[0:10]
+
+        print(np.histogram(a, weights=x, bins=bins))
+

eland/utils.py

@@ -46,11 +46,11 @@ def pandas_to_es(df, es_params, destination_index, if_exists='fail', chunk_size=
             )
         elif if_exists == "replace":
             client.index_delete(index=destination_index)
-            client.index_create(index=destination_index, mapping=mapping)
+            client.index_create(index=destination_index, body=mapping)
         # elif if_exists == "append":
         # TODO validate mapping is compatible
     else:
-        client.index_create(index=destination_index, mapping=mapping)
+        client.index_create(index=destination_index, body=mapping)
 
     # Now add data
     actions = []