Odd behaviour once I add a matplotlib command into a python program

[wpfan1000]

Hi,

Once I add matplotlib command to a program, and run that program once, succesfully, then Spyder:

• Does not run program when Run file is pressed again - I just see ">>> runfile" with the path to the file...
• If I click Run file several times, the program runs BUT it is NOT the code in the editor, it is code that existed before some recent changes
• Does not save program

I press Exit Debug to try and resolve this - pressing this multiple times sometimes results in the program running multiple times.

Also this odd behaviour seems to change - ie there is no consistent bad behaviour, so sorry if my description is not clear.

The only way I have found to resolve this is to completely exit and re-start Spyder.

Please help.

[ccordoba12]

Questions:

1. Spyder version?
2. Python version?
3. Operating system?

[wpfan1000]

Sorry, I should have included that in my OP:

Python 3.5.1 |Anaconda 2.4.1 (64-bit)| (default, Dec 7 2015, 15:00:12)
[MSC v.1900 64 bit (AMD64)] on win32

Spyder 2.3.8

Windows 7 64 bit

Thanks

On 03/02/2016 10:56 AM, Carlos Cordoba wrote:

Questions:

1. Spyder version?
2. Python version?
3. Operating system?

—
Reply to this email directly or view it on GitHub
#2967 (comment).

[wpfan1000]

I thought I would try and write a simple program to eliminate issues due to my complex code.
Even this code causes the issue:

import pandas
import matplotlib.pyplot as plt


# Read Yahoo data csv file into dataframe:
symbol_historical_data_frame = pandas.read_csv('symbol_historical_data_frame.csv')


# Debug:
# print (symbol_historical_data_frame)

symbol_historical_data_frame[['Open','High','Low','Close']].plot()
plt.show()

Please please help

[ccordoba12]

I forgot to ask: what's your Matplotlib backend?

[ccordoba12]

In the mean time you can use the IPython console, which doesn't have this problem.

[wpfan1000]

HI, thanks for your response.
I do not know what a backend is and so I googled it - I see a lot of info about how to set it like
http://matplotlib.org/faq/usage_faq.html#what-is-a-backend
but I do not see how to get the current backend...
Could you explain how to do that?
Thanks

[wpfan1000]

I switched to the IPython console as you recommended and it does work consistently - thanks.
However my plot is now shown inside the console as quite a small image - in Spyder the plot was rendedered in a separate window so I can see it full screen - is there a way to do that in IPython console?

[ccordoba12]

You need to change your backend in

Preferences > IPython Console > Graphics

from Inlne to Automatic

[ccordoba12]

This is almost a duplicate of issue #1831, so I'm closing it.