Merge pull request civisanalytics#246 from waltaskew/flush-buffers

In Which We Flush Buffers After Finishing Writing to Them

Author: waltaskew

CHANGELOG.md

@@ -8,6 +8,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
   pass in tables like schema."tablename.with.periods".
 - Adding in missing documentation for civis_file_to_table
 - Include JSON files with pip distributions (#244)
+- Added flush to `civis_to_file` when passed a user-created buffer,
+  ensuring the buffer contains the entire file when subsequently read.
 
 ### Added
 - Added a utility function which can robustly split a Redshift schema name

civis/io/_files.py

@@ -303,6 +303,7 @@ def civis_to_file(file_id, buf, api_key=None, client=None):
             _civis_to_file(file_id, f, api_key=api_key, client=client)
     else:
         _civis_to_file(file_id, buf, api_key=api_key, client=client)
+        buf.flush()
 
 
 def _civis_to_file(file_id, buf, api_key=None, client=None):