We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Move to postgres
That's the database of choice hasadna uses

<!---
@huboard:{"order":125.5,"milestone_order":81,"custom_state":""}
-->


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `config.py`
Content:
```
1 import os
2 
3 #
4 # This is the configuration file of the application
5 #
6 # Please make sure you don't store here any secret information and use environment
7 # variables
8 #
9 
10 
11 SQLALCHEMY_DATABASE_URI = os.environ.get('CLEARDB_DATABASE_URL')
12 SQLALCHEMY_POOL_RECYCLE = 60
13 
14 
15 SECRET_KEY = 'aiosdjsaodjoidjioewnioewfnoeijfoisdjf'
16 
17 FACEBOOK_KEY = "157028231131213"
18 FACEBOOK_SECRET = "0437ee70207dca46609219b990be0614"
19
```

Path: `mysqlshell.py`
Content:
```
1 #!/usr/bin/env python
2 import sys
3 import os
4 import urlparse
5 
6 def main():
7     DATABASE_URI = os.getenv('CLEARDB_DATABASE_URL')
8 
9     if not DATABASE_URI:
10         print >>sys.stderr, 'Environment CLEARDB_DATABASE_URL not set'
11         sys.exit(1)
12 
13     db = urlparse.urlparse(DATABASE_URI)
14     os.execlp('mysql', 'mysql', '-u', db.username, '-p' + db.password, '-h', db.hostname, db.path[1:])
15 
16 if __name__ == '__main__':
17     main()
18
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/config.py b/config.py
--- a/config.py
+++ b/config.py
@@ -8,7 +8,7 @@
 #
 
 
-SQLALCHEMY_DATABASE_URI = os.environ.get('CLEARDB_DATABASE_URL')
+SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL')
 SQLALCHEMY_POOL_RECYCLE = 60
 
 
diff --git a/mysqlshell.py b/mysqlshell.py
deleted file mode 100755
--- a/mysqlshell.py
+++ /dev/null
@@ -1,17 +0,0 @@
-#!/usr/bin/env python
-import sys
-import os
-import urlparse
-
-def main():
-    DATABASE_URI = os.getenv('CLEARDB_DATABASE_URL')
-
-    if not DATABASE_URI:
-        print >>sys.stderr, 'Environment CLEARDB_DATABASE_URL not set'
-        sys.exit(1)
-
-    db = urlparse.urlparse(DATABASE_URI)
-    os.execlp('mysql', 'mysql', '-u', db.username, '-p' + db.password, '-h', db.hostname, db.path[1:])
-
-if __name__ == '__main__':
-    main()

{"golden_diff": "diff --git a/config.py b/config.py\n--- a/config.py\n+++ b/config.py\n@@ -8,7 +8,7 @@\n #\n \n \n-SQLALCHEMY_DATABASE_URI = os.environ.get('CLEARDB_DATABASE_URL')\n+SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL')\n SQLALCHEMY_POOL_RECYCLE = 60\n \n \ndiff --git a/mysqlshell.py b/mysqlshell.py\ndeleted file mode 100755\n--- a/mysqlshell.py\n+++ /dev/null\n@@ -1,17 +0,0 @@\n-#!/usr/bin/env python\n-import sys\n-import os\n-import urlparse\n-\n-def main():\n-    DATABASE_URI = os.getenv('CLEARDB_DATABASE_URL')\n-\n-    if not DATABASE_URI:\n-        print >>sys.stderr, 'Environment CLEARDB_DATABASE_URL not set'\n-        sys.exit(1)\n-\n-    db = urlparse.urlparse(DATABASE_URI)\n-    os.execlp('mysql', 'mysql', '-u', db.username, '-p' + db.password, '-h', db.hostname, db.path[1:])\n-\n-if __name__ == '__main__':\n-    main()\n", "issue": "Move to postgres\nThat's the database of choice hasadna uses\n\n<!---\n@huboard:{\"order\":125.5,\"milestone_order\":81,\"custom_state\":\"\"}\n-->\n\n", "before_files": [{"content": "import os\n\n#\n# This is the configuration file of the application\n#\n# Please make sure you don't store here any secret information and use environment\n# variables\n#\n\n\nSQLALCHEMY_DATABASE_URI = os.environ.get('CLEARDB_DATABASE_URL')\nSQLALCHEMY_POOL_RECYCLE = 60\n\n\nSECRET_KEY = 'aiosdjsaodjoidjioewnioewfnoeijfoisdjf'\n\nFACEBOOK_KEY = \"157028231131213\"\nFACEBOOK_SECRET = \"0437ee70207dca46609219b990be0614\"\n", "path": "config.py"}, {"content": "#!/usr/bin/env python\nimport sys\nimport os\nimport urlparse\n\ndef main():\n    DATABASE_URI = os.getenv('CLEARDB_DATABASE_URL')\n\n    if not DATABASE_URI:\n        print >>sys.stderr, 'Environment CLEARDB_DATABASE_URL not set'\n        sys.exit(1)\n\n    db = urlparse.urlparse(DATABASE_URI)\n    os.execlp('mysql', 'mysql', '-u', db.username, '-p' + db.password, '-h', db.hostname, db.path[1:])\n\nif __name__ == '__main__':\n    main()\n", "path": "mysqlshell.py"}], "after_files": [{"content": "import os\n\n#\n# This is the configuration file of the application\n#\n# Please make sure you don't store here any secret information and use environment\n# variables\n#\n\n\nSQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL')\nSQLALCHEMY_POOL_RECYCLE = 60\n\n\nSECRET_KEY = 'aiosdjsaodjoidjioewnioewfnoeijfoisdjf'\n\nFACEBOOK_KEY = \"157028231131213\"\nFACEBOOK_SECRET = \"0437ee70207dca46609219b990be0614\"\n", "path": "config.py"}, {"content": null, "path": "mysqlshell.py"}]}