Finish writer documentation, final cleanup.

docs/index.md

@@ -95,3 +95,16 @@ my_keys = KeyCollection(my_secret_key, my_other_secret_key)
 with open("hello.txt.c4gh") as f:
 	crypt4gh = Crypt4GH(my_keys, f)
 ```
+
+### Container Serialization
+
+An initialized container can be also serialized. Currently the result
+of such serialization should be exactly the same binary data as the
+original input.
+
+```python
+from oarepo_cg4h import Crypt4GHWriter
+
+writer = Crypt4GHWriter(crypt4gh, open("output.c4gh", "w"))
+writer.write()
+```

oarepo_c4gh/__init__.py

@@ -12,6 +12,7 @@
     "SoftwareKey",
     "C4GHKey",
     "Crypt4GH",
+    "Crypt4GHWriter",
     "Crypt4GHException",
     "Crypt4GHKeyException",
     "Crypt4GHHeaderException",

oarepo_c4gh/crypt4gh/__init__.py

@@ -1,3 +1,4 @@
 from .crypt4gh import Crypt4GH
+from .writer import Crypt4GHWriter
 
-__all__ = ["Crypt4GH"]
+__all__ = ["Crypt4GH", "Crypt4GHWriter"]

tests/test_writer.py

@@ -28,6 +28,7 @@ def test_abstract_container(self):
         assert c4gh.header is None, "Implementation in abstract class"
         assert c4gh.data_blocks is None, "Implementation in abstract class"
 
+
 class TestCrypt4GHWriter(unittest.TestCase):
 
     def test_writing_header(self):