Bernhard Walter created ZEPPELIN-2158:
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Summary: PySpark: Error trace appears when assigning a value to
variable "z"
Key: ZEPPELIN-2158
URL: https://issues.apache.org/jira/browse/ZEPPELIN-2158
Project: Zeppelin
Issue Type: Bug
Components: front-end, GUI
Affects Versions: 0.7.0
Reporter: Bernhard Walter
*Issue:*
Variable "z" seems to be bound to the ZeppelinContext
Now "z" can be assigned with any value, e.g.
{code}
%pyspark
z=[]
{code}
This leads to
{code}
Traceback (most recent call last):
File
"/var/folders/sf/prpc_v7d1vbdjz61kshfh9x00000gp/T/zeppelin_pyspark-6677949145168225238.py",
line 344, in <module>
exec(code)
File "<stdin>", line 3, in <module>
AttributeError: 'list' object has no attribute '_displayhook'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File
"/var/folders/sf/prpc_v7d1vbdjz61kshfh9x00000gp/T/zeppelin_pyspark-6677949145168225238.py",
line 346, in <module>
raise Exception(traceback.format_exc())
Exception: Traceback (most recent call last):
File
"/var/folders/sf/prpc_v7d1vbdjz61kshfh9x00000gp/T/zeppelin_pyspark-6677949145168225238.py",
line 344, in <module>
exec(code)
File "<stdin>", line 3, in <module>
AttributeError: 'list' object has no attribute '_displayhook'
{code}
in every cell that is executed later on.
Since z is a very common variable in math and statistics science, it should not
be used for ZeppelinContext.
Propsal (use double underscore like in python for private stuff):
{code}
__z
{code}
or better
{code}
__zeppelinContext
{code}
*Environment:*
Downloaded
http://apache.mirror.digionline.de/zeppelin/zeppelin-0.7.0/zeppelin-0.7.0-bin-netinst.tgz
and installed spark, python, sh, md and angular interpreter
Started via bin/zeppelin.sh
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