There are multiple draw_if_interactive() expressions in the pyplot module but I can't find this function's definition anywhere in the module.
From intuition and readings, it's an easy guess that the function enables on-demand plotting but where can I read its definition? Thanks.
The function is actually in the backend code. The actual implementation depends on your backend. For example the function with the TkAgg
backend is in backend_tkagg.py
:
def draw_if_interactive():
if matplotlib.is_interactive():
figManager = Gcf.get_active()
if figManager is not None:
figManager.show()
Same kind of functions seem to be for other backends, they use the matplotlib.is_interactive
to determine if this is an interactive session and then use the backend specific drawing commands to draw the image.