Python, matplotlib pyplot show() not blocking
Question: I'm new to matplotlib.pyplot. I'm having trouble with the show() function not
blocking. I've taken over a python application from someone that left and I
seem to remembering this worked on his (IT reclaimed) PC. Here's the code ...

    
    
    import matplotlib.pyplot as plt
    
    plt.title("Molding X Error")
    plt.xlabel("X")
    plt.ylabel("X Error")
    plt.plot( ... details that work and not the problem ... )
    plt.show(block=True)
    
    plt.title("Molding Y Error")
    plt.xlabel("Y")
    plt.ylabel("Y Error")        
    plt.plot( ... details that work and not the problem ... )
    plt.show(block=True)
    

On the other guys PC, the first show() would display appropriately. After
dismissing the first, the second would display.

I run it, and it not only doesn't stop on the first show(), it combines data
from both the first and second with the title and labels from the second.

I step through with the debugger, and the first does show, but stepping to the
second the same result is seen.

Windows 7 Pro 64-bit. Python2.7.10, Anaconda 2.3.0 which contains (apparently)
matplotlib1.4.3 Note: I did read through "(python) matplotlib pyplot show() ..
blocking or not?" where it was from 2011 and was referring to matplotlib1.0.1
as a solution.


Answer: <http://matplotlib.org/api/pyplot_api.html?highlight=plot#matplotlib.pyplot.show>

> In non-interactive mode, display all figures and block until the figures
> have been closed; in interactive mode it has no effect unless figures were
> created prior to a change from non-interactive to interactive mode (not
> recommended). In that case it displays the figures but does not block. A
> single experimental keyword argument, block, may be set to True or False to
> override the blocking behavior described above.

