Make DataFrame.to_html output full content

doc/source/whatsnew/v0.24.0.rst

@@ -1724,6 +1724,7 @@ I/O
 - Bug in :func:`DataFrame.to_html()` with ``index_names=False`` displaying index name (:issue:`22747`)
 - Bug in :func:`DataFrame.to_html()` with ``header=False`` not displaying row index names (:issue:`23788`)
 - Bug in :func:`DataFrame.to_html()` with ``sparsify=False`` that caused it to raise ``TypeError`` (:issue:`22887`)
+- Bug in :func:`DataFrame.to_html()` where values were truncated using display options instead of displaying the full content (:issue:`17004`)
 - Bug in :func:`DataFrame.to_string()` that broke column alignment when ``index=False`` and width of first column's values is greater than the width of first column's header (:issue:`16839`, :issue:`13032`)
 - Bug in :func:`DataFrame.to_string()` that caused representations of :class:`DataFrame` to not take up the whole window (:issue:`22984`)
 - Bug in :func:`DataFrame.to_csv` where a single level MultiIndex incorrectly wrote a tuple. Now just the value of the index is written (:issue:`19589`).

pandas/conftest.py

@@ -675,3 +675,20 @@ def tick_classes(request):
         normalize=st.booleans(),
         startingMonth=st.integers(min_value=1, max_value=12)
     ))
+
+lorem_ipsum_text = (
+    "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod"
+    " tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim"
+    " veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex"
+    " ea commodo consequat. Duis aute irure dolor in reprehenderit in"
+    " voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur"
+    " sint occaecat cupidatat non proident, sunt in culpa qui officia"
+    " deserunt mollit anim id est laborum.")
+
+
+@pytest.fixture(scope='session')
+def lorem_ipsum():
+    """
+    Fixture for Lorem ipsum placeholder text.
+    """
+    return lorem_ipsum_text

pandas/io/formats/html.py

@@ -11,7 +11,7 @@
 
 from pandas.core.dtypes.generic import ABCMultiIndex
 
-from pandas import compat
+from pandas import compat, option_context
 import pandas.core.common as com
 from pandas.core.config import get_option
 
@@ -320,9 +320,15 @@ def _write_header(self, indent):
 
         self.write('</thead>', indent)
 
+    def _get_formatted_values(self):
+        with option_context('display.max_colwidth', 999999):
+            fmt_values = {i: self.fmt._format_col(i)
+                          for i in range(self.ncols)}
+        return fmt_values
+
     def _write_body(self, indent):
         self.write('<tbody>', indent)
-        fmt_values = {i: self.fmt._format_col(i) for i in range(self.ncols)}
+        fmt_values = self._get_formatted_values()
 
         # write values
         if self.fmt.index and isinstance(self.frame.index, ABCMultiIndex):
@@ -486,6 +492,9 @@ class NotebookFormatter(HTMLFormatter):
     DataFrame._repr_html_() and DataFrame.to_html(notebook=True)
     """
 
+    def _get_formatted_values(self):
+        return {i: self.fmt._format_col(i) for i in range(self.ncols)}
+
     def write_style(self):
         # We use the "scoped" attribute here so that the desired
         # style properties for the data frame are not then applied

pandas/tests/io/formats/test_to_html.py

@@ -600,3 +600,22 @@ def test_to_html_render_links(render_links, expected, datapath):
     result = df.to_html(render_links=render_links)
     expected = expected_html(datapath, expected)
     assert result == expected
+
+
+@pytest.mark.parametrize('max_colwidth', [10, 20, 50, 100])
+def test_display_max_colwidth(lorem_ipsum, max_colwidth):
+    # see gh-17004
+    df = DataFrame([lorem_ipsum])
+    with pd.option_context('display.max_colwidth', max_colwidth):
+        result = df._repr_html_()
+    expected = lorem_ipsum[:max_colwidth - 4] + '...'
+    assert expected in result
+
+
+@pytest.mark.parametrize('max_colwidth', [10, 20, 50, 100])
+def test_ignore_display_max_colwidth(lorem_ipsum, max_colwidth):
+    # see gh-17004
+    df = DataFrame([lorem_ipsum])
+    with pd.option_context('display.max_colwidth', max_colwidth):
+        result = df.to_html()
+    assert lorem_ipsum in result