Skip to main content

Embedding an IPython shell in the middle of python code

For a long time I had been looking for a satisfactory way to export a variable from some python code to the main python workspace. This stackoverflow thread sort of got at it, but not really. I love pdb, especially pdb.pm(), however, sometimes you just need the full capability of IPython, including object introspection.

Well, there is an amazing solution. In the place in the code where you would do
import pdb;pdb.set_trace()
, if you do instead
from IPython import embed; embed()
, your code will pause at that place and you will get a fully functional IPython shell. When you exit from that shell you code will continue as usual.

Comments

Popular posts from this blog

Python: Multiprocessing: passing multiple arguments to a function

Write a wrapper function to unpack the arguments before calling the real function. Lambda won't work, for some strange un-Pythonic reason.


import multiprocessing as mp def myfun(a,b): print a + b def mf_wrap(args): return myfun(*args) p = mp.Pool(4) fl = [(a,b) for a in range(3) for b in range(2)] #mf_wrap = lambda args: myfun(*args) -> this sucker, though more pythonic and compact, won't work p.map(mf_wrap, fl)

Flowing text in inkscape (Poster making)

You can flow text into arbitrary shapes in inkscape. (From a hint here).

You simply create a text box, type your text into it, create a frame with some drawing tool, select both the text box and the frame (click and shift) and then go to text->flow into frame.

UPDATE:

The omnipresent anonymous asked:
Trying to enter sentence so that text forms the number three...any ideas?
The solution:
Type '3' using the text toolConvert to path using object->pathSize as necessaryRemove fillUngroupType in actual text in new text boxSelect the text and the '3' pathFlow the text

Running a task in a separate thread in a Tkinter app.

Use Queues to communicate between main thread and sub-threadUse wm_protocol/protocol to handle quit eventUse Event to pass a message to sub-threadimport Tkinter as tki, threading, Queue, time def thread(q, stop_event): """q is a Queue object, stop_event is an Event. stop_event from http://stackoverflow.com/questions/6524459/stopping-a-thread-python """ while(not stop_event.is_set()): if q.empty(): q.put(time.strftime('%H:%M:%S')) class App(object): def __init__(self): self.root = tki.Tk() self.win = tki.Text(self.root, undo=True, width=10, height=1) self.win.pack(side='left') self.queue = Queue.Queue(maxsize=1) self.poll_thread_stop_event = threading.Event() self.poll_thread = threading.Thread(target=thread, name='Thread', args=(self.queue,self.poll_thread_stop_event)) self.poll_thread.start() self.poll_interval = 250 self.poll() self.root.wm_protocol("WM_DELETE…