summaryrefslogtreecommitdiffstats
path: root/docs/nativetypes.rst
diff options
context:
space:
mode:
Diffstat (limited to 'docs/nativetypes.rst')
-rw-r--r--docs/nativetypes.rst64
1 files changed, 64 insertions, 0 deletions
diff --git a/docs/nativetypes.rst b/docs/nativetypes.rst
new file mode 100644
index 0000000..1a08700
--- /dev/null
+++ b/docs/nativetypes.rst
@@ -0,0 +1,64 @@
+.. module:: jinja2.nativetypes
+
+.. _nativetypes:
+
+Native Python Types
+===================
+
+The default :class:`~jinja2.Environment` renders templates to strings. With
+:class:`NativeEnvironment`, rendering a template produces a native Python type.
+This is useful if you are using Jinja outside the context of creating text
+files. For example, your code may have an intermediate step where users may use
+templates to define values that will then be passed to a traditional string
+environment.
+
+Examples
+--------
+
+Adding two values results in an integer, not a string with a number:
+
+>>> env = NativeEnvironment()
+>>> t = env.from_string('{{ x + y }}')
+>>> result = t.render(x=4, y=2)
+>>> print(result)
+6
+>>> print(type(result))
+int
+
+Rendering list syntax produces a list:
+
+>>> t = env.from_string('[{% for item in data %}{{ item + 1 }},{% endfor %}]')
+>>> result = t.render(data=range(5))
+>>> print(result)
+[1, 2, 3, 4, 5]
+>>> print(type(result))
+list
+
+Rendering something that doesn't look like a Python literal produces a string:
+
+>>> t = env.from_string('{{ x }} * {{ y }}')
+>>> result = t.render(x=4, y=2)
+>>> print(result)
+4 * 2
+>>> print(type(result))
+str
+
+Rendering a Python object produces that object as long as it is the only node:
+
+>>> class Foo:
+... def __init__(self, value):
+... self.value = value
+...
+>>> result = env.from_string('{{ x }}').render(x=Foo(15))
+>>> print(type(result).__name__)
+Foo
+>>> print(result.value)
+15
+
+API
+---
+
+.. autoclass:: NativeEnvironment([options])
+
+.. autoclass:: NativeTemplate([options])
+ :members: render