REF: Move template to its own file

Use Environment and PackageLoader to load it

TODO: packaging, __init__.py?

Author: TomAugspurger

pandas/formats/style.py

@@ -10,7 +10,7 @@
 from collections import defaultdict, MutableMapping
 
 try:
-    from jinja2 import Template
+    from jinja2 import Template, PackageLoader, Environment
 except ImportError:
     msg = "pandas.Styler requires jinja2. "\
           "Please install with `conda install Jinja2`\n"\
@@ -34,6 +34,7 @@
     no_mpl_message = "{0} requires matplotlib."
 
 
+
 @contextmanager
 def _mpl(func):
     if has_mpl:
@@ -103,56 +104,10 @@ class Styler(object):
     --------
     pandas.DataFrame.style
     """
-    template = Template("""
-        <style  type="text/css" >
-        {% for s in table_styles %}
-            #T_{{uuid}} {{s.selector}} {
-            {% for p,val in s.props %}
-                {{p}}: {{val}};
-            {% endfor %}
-            }
-        {% endfor %}
-        {% for s in cellstyle %}
-            #T_{{uuid}}{{s.selector}} {
-            {% for p,val in s.props %}
-                {{p}}: {{val}};
-            {% endfor %}
-            }
-        {% endfor %}
-        </style>
-
-        <table id="T_{{uuid}}" {{ table_attributes }}>
-        {% if caption %}
-            <caption>{{caption}}</caption>
-        {% endif %}
-
-        <thead>
-            {% for r in head %}
-            <tr>
-                {% for c in r %}
-                {% if c.is_visible != False %}
-                <{{c.type}} class="{{c.class}}" {{ c.attributes|join(" ") }}>
-                  {{c.value}}
-                {% endif %}
-                {% endfor %}
-            </tr>
-            {% endfor %}
-        </thead>
-        <tbody>
-            {% for r in body %}
-            <tr>
-                {% for c in r %}
-                {% if c.is_visible != False %}
-                <{{c.type}} id="T_{{uuid}}{{c.id}}"
-                 class="{{c.class}}" {{ c.attributes|join(" ") }}>
-                    {{ c.display_value }}
-                {% endif %}
-                {% endfor %}
-            </tr>
-            {% endfor %}
-        </tbody>
-        </table>
-        """)
+    env = Environment(
+        loader=PackageLoader("pandas", "formats/templates")
+    )
+    template = env.get_template("html.tpl")
 
     def __init__(self, data, precision=None, table_styles=None, uuid=None,
                  caption=None, table_attributes=None):

pandas/formats/templates/html.tpl

@@ -0,0 +1,48 @@
+<style  type="text/css" >
+{% for s in table_styles %}
+    #T_{{uuid}} {{s.selector}} {
+    {% for p,val in s.props %}
+        {{p}}: {{val}};
+    {% endfor %}
+    }
+{% endfor %}
+{% for s in cellstyle %}
+    #T_{{uuid}}{{s.selector}} {
+    {% for p,val in s.props %}
+        {{p}}: {{val}};
+    {% endfor %}
+    }
+{% endfor %}
+</style>
+
+<table id="T_{{uuid}}" {{ table_attributes }}>
+{% if caption %}
+    <caption>{{caption}}</caption>
+{% endif %}
+
+<thead>
+    {% for r in head %}
+    <tr>
+        {% for c in r %}
+        {% if c.is_visible != False %}
+        <{{c.type}} class="{{c.class}}" {{ c.attributes|join(" ") }}>
+          {{c.value}}
+        {% endif %}
+        {% endfor %}
+    </tr>
+    {% endfor %}
+</thead>
+<tbody>
+    {% for r in body %}
+    <tr>
+        {% for c in r %}
+        {% if c.is_visible != False %}
+        <{{c.type}} id="T_{{uuid}}{{c.id}}"
+          class="{{c.class}}" {{ c.attributes|join(" ") }}>
+            {{ c.display_value }}
+        {% endif %}
+        {% endfor %}
+    </tr>
+    {% endfor %}
+</tbody>
+</table>