Pushed out new version of PythonDBAGraphs

I pushed out a new version of PythonDBAGraphs. I got a new laptop at work so I am setting it up with the software that I need to do my job. I decided that instead of reinstalling Enthought Canopy I would go with the current version of Python 3 and install the packages that I need one at a time. This gives me a cleaner install and I’m on the most current version of Python and the packages. I had installed Canopy for the two edX classes that I took so I wasn’t motivated to uninstall it on my old laptop. I use PythonDBAGraphs just about every day for my work and I didn’t want to whack it by uninstalling Canopy on my old laptop and trying to install something new. But, now I have my old laptop as a backup so I was able to take the time to install Python 3 and the current packages. I have updated the README with details of my new configuration.

I had to make a number of changes in the code. I had to change <> to !=. I had to change print xyz to print(xyz). Also, I think I ran across a bug in the new version of cx_Oracle. Here is an example. Assume you have an open connection and cursor. The cursor is cur.

cur.execute('select to_char(blocks/7) from user_tables')
row = cur.fetchone()
print(row)

cur.execute('select blocks/7 from user_tables')
row = cur.fetchone()
print(row)

Here is the output:

('2.28571428571428571428571428571428571429',)
Traceback (most recent call last):
  File "bug.py", line 12, in 
    row = cur.fetchone()
ValueError: invalid literal for int() with base 10: '2.28571428571428571428571428571428571429'

Strange. The workaround is to take any numbers with fractional values and run to_char() on them. I made a number of changes in the code to work around this bug/feature.

Anyway, I’m glad that I moved to Python 3 and that it enables me to use pip to install just the packages I want. Hopefully this update will make PythonDBAGraphs more usable for others since not everyone has Canopy.

Bobby

P.S. Two things happened today, 6/9/2017. I found out how to put in a bug on the cx_oracle github site and it was quickly resolved so the fix will be in future releases. Second, I pulled the new version down to my old laptop and made a couple of simple changes to get my new version to still work on Python 2 and Canopy. Still works with the older version of matplotlib and cx_oracle as well.

About Bobby

I live in Chandler, Arizona with my wife and three daughters. I work for US Foods, the second largest food distribution company in the United States. I have worked in the Information Technology field since 1989. I have a passion for Oracle database performance tuning because I enjoy challenging technical problems that require an understanding of computer science. I enjoy communicating with people about my work.
This entry was posted in Uncategorized. Bookmark the permalink.

Leave a Reply