DOC: Show exchange required for equities

robincc · Apr 4, 2017 · 0c246a7 · 0c246a7
1 parent a006b4b
commit 0c246a7
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/zipline/assets/asset_writer.py b/zipline/assets/asset_writer.py
@@ -388,7 +388,7 @@ def write(self,
                   The first date we have trade data for this asset.
               auto_close_date : datetime, optional
                   The date on which to close any positions in this asset.
-              exchange : str, optional
+              exchange : str
                   The exchange where this asset is traded.
 
             The index of this dataframe should contain the sids.
@@ -408,7 +408,7 @@ def write(self,
                   The last date we have trade data for this asset.
               first_traded : datetime, optional
                   The first date we have trade data for this asset.
-              exchange : str, optional
+              exchange : str
                   The exchange where this asset is traded.
               notice_date : datetime
                   The date when the owner of the contract may be forced