GitHub user astroshim opened a pull request:
https://github.com/apache/zeppelin/pull/2106
Py4j python interpreter
### What is this PR for?
I've been testing the python interpreter and I found at least 4 major
issues in the current python interpreter.
1. not working streaming output.
- https://issues.apache.org/jira/browse/ZEPPELIN-2225
2. printed "..." when there is indent in the python code.
- https://issues.apache.org/jira/browse/ZEPPELIN-1929
3. very slow output of matplotlib
- https://issues.apache.org/jira/browse/ZEPPELIN-1894
- https://issues.apache.org/jira/browse/ZEPPELIN-1360
4. Unexpected output of matplotlib.
- https://issues.apache.org/jira/browse/ZEPPELIN-2107
so I changed python interpreter to use py4j based on pyspark interpreter
and would be fixed above issues.
and I am going to recreate conda, docker for python interpreter ASAP.
### What type of PR is it?
Bug Fix | Hot Fix | Refactoring
### How should this be tested?
1. not working streaming output.
```
import time
for x in range(0, 5):
print x
time.sleep(1)
```
2. printed "..." when there is indent in the python code.
```
def fn():
print("hi")
fn()
```
3. very slow output of matplotlib.
```
import matplotlib
import sys
import matplotlib.pyplot as plt
plt.plot([1,2,3])
```
4. Unexpected output of matplotlib.
```
import matplotlib.pyplot as plt
import matplotlib as mpl
# Make a figure and axes with dimensions as desired.
fig = plt.figure(figsize=(8, 3))
ax1 = fig.add_axes([0.05, 0.80, 0.9, 0.15])
ax2 = fig.add_axes([0.05, 0.475, 0.9, 0.15])
ax3 = fig.add_axes([0.05, 0.15, 0.9, 0.15])
# Set the colormap and norm to correspond to the data for which
# the colorbar will be used.
cmap = mpl.cm.cool
norm = mpl.colors.Normalize(vmin=5, vmax=10)
# ColorbarBase derives from ScalarMappable and puts a colorbar
# in a specified axes, so it has everything needed for a
# standalone colorbar. There are many more kwargs, but the
# following gives a basic continuous colorbar with ticks
# and labels.
cb1 = mpl.colorbar.ColorbarBase(ax1, cmap=cmap,
norm=norm,
orientation='horizontal')
cb1.set_label('Some Units')
# The second example illustrates the use of a ListedColormap, a
# BoundaryNorm, and extended ends to show the "over" and "under"
# value colors.
cmap = mpl.colors.ListedColormap(['r', 'g', 'b', 'c'])
cmap.set_over('0.25')
cmap.set_under('0.75')
# If a ListedColormap is used, the length of the bounds array must be
# one greater than the length of the color list. The bounds must be
# monotonically increasing.
bounds = [1, 2, 4, 7, 8]
norm = mpl.colors.BoundaryNorm(bounds, cmap.N)
cb2 = mpl.colorbar.ColorbarBase(ax2, cmap=cmap,
norm=norm,
# to use 'extend', you must
# specify two extra boundaries:
boundaries=[0] + bounds + [13],
extend='both',
ticks=bounds, # optional
spacing='proportional',
orientation='horizontal')
cb2.set_label('Discrete intervals, some other units')
# The third example illustrates the use of custom length colorbar
# extensions, used on a colorbar with discrete intervals.
cmap = mpl.colors.ListedColormap([[0., .4, 1.], [0., .8, 1.],
[1., .8, 0.], [1., .4, 0.]])
cmap.set_over((1., 0., 0.))
cmap.set_under((0., 0., 1.))
bounds = [-1., -.5, 0., .5, 1.]
norm = mpl.colors.BoundaryNorm(bounds, cmap.N)
cb3 = mpl.colorbar.ColorbarBase(ax3, cmap=cmap,
norm=norm,
boundaries=[-10] + bounds + [10],
extend='both',
# Make the length of each extension
# the same as the length of the
# interior colors:
extendfrac='auto',
ticks=bounds,
spacing='uniform',
orientation='horizontal')
cb3.set_label('Custom extension lengths, some other units')
plt.show()
```
### Questions:
* Does the licenses files need update? no
* Is there breaking changes for older versions? no
* Does this needs documentation? no
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/astroshim/zeppelin py4jPythonInterpreter
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/zeppelin/pull/2106.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2106
----
commit 7304919def595312c971e04b7fc5a24c23bd93e8
Author: astroshim <hss...@zepl.com>
Date: 2017-03-07T01:43:58Z
initialize python interpreter using py4j
commit 276011e32d5ba7fb416744fbbd212916b4e57ce7
Author: astroshim <hss...@zepl.com>
Date: 2017-03-07T04:20:49Z
add py4j lib
commit 1395875b51795e646ed559b52156d9e8f302e5b0
Author: astroshim <hss...@zepl.com>
Date: 2017-03-07T09:34:10Z
removed unnecessary code.
----
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