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Backport PR #2384: Adapt inline backend to changes in matplotlib...
Backport PR #2384: Adapt inline backend to changes in matplotlib Matplotlib recently merged https://github.com/matplotlib/matplotlib/pull/1125 that makes it simpler to use objective oriented figure creation by automatically creating the right canvas for the backend. To solve that all backends must provide a backend_xxx.FigureCanvas. This is obviosly missing from the inline backend. The change is needed to make the inline backend work with mpl's 1.2.x branch which is due to released soon. Simply setting the default canvas equal to a Agg canvas appears to work for both svg and png figures but I'm not sure weather that is the right approach. Should the canvas depend on the figure format and provide a svg canvas for a svg figure? (Note that before this change to matplotlib the canvas from a plt.figure call seams to be a agg type in all cases) Edit: I made the pull request against 0.13.1 since it would be good to have this in the stable branch for when mpl is released. Just let me know and I can rebase it against master

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ipy.vim
665 lines | 24.4 KiB | text/x-vim | VimLexer
" Vim integration with IPython 0.11+
"
" A two-way integration between Vim and IPython.
"
" Using this plugin, you can send lines or whole files for IPython to execute,
" and also get back object introspection and word completions in Vim, like
" what you get with: object?<enter> object.<tab> in IPython
"
" -----------------
" Quickstart Guide:
" -----------------
" Start ipython qtconsole and copy the connection string.
" Source this file, which provides new IPython command
" :source ipy.vim
" :IPythonClipboard
" (or :IPythonXSelection if you're using X11 without having to copy)
"
" written by Paul Ivanov (http://pirsquared.org)
"
if !has('python')
" exit if python is not available.
finish
endif
" Allow custom mappings.
if !exists('g:ipy_perform_mappings')
let g:ipy_perform_mappings = 1
endif
" Register IPython completefunc
" 'global' -- for all of vim (default).
" 'local' -- only for the current buffer.
" otherwise -- don't register it at all.
"
" you can later set it using ':set completefunc=CompleteIPython', which will
" correspond to the 'global' behavior, or with ':setl ...' to get the 'local'
" behavior
if !exists('g:ipy_completefunc')
let g:ipy_completefunc = 'global'
endif
python << EOF
reselect = False # reselect lines after sending from Visual mode
show_execution_count = True # wait to get numbers for In[43]: feedback?
monitor_subchannel = True # update vim-ipython 'shell' on every send?
run_flags= "-i" # flags to for IPython's run magic when using <F5>
current_line = ''
import vim
import sys
# get around unicode problems when interfacing with vim
vim_encoding=vim.eval('&encoding') or 'utf-8'
try:
sys.stdout.flush
except AttributeError:
# IPython complains if stderr and stdout don't have flush
# this is fixed in newer version of Vim
class WithFlush(object):
def __init__(self,noflush):
self.write=noflush.write
self.writelines=noflush.writelines
def flush(self):pass
sys.stdout = WithFlush(sys.stdout)
sys.stderr = WithFlush(sys.stderr)
ip = '127.0.0.1'
try:
km
except NameError:
km = None
try:
pid
except NameError:
pid = None
def km_from_string(s=''):
"""create kernel manager from IPKernelApp string
such as '--shell=47378 --iopub=39859 --stdin=36778 --hb=52668' for IPython 0.11
or just 'kernel-12345.json' for IPython 0.12
"""
from os.path import join as pjoin
from IPython.zmq.blockingkernelmanager import BlockingKernelManager, Empty
from IPython.config.loader import KeyValueConfigLoader
from IPython.zmq.kernelapp import kernel_aliases
global km,send,Empty
s = s.replace('--existing', '')
if 'connection_file' in BlockingKernelManager.class_trait_names():
from IPython.lib.kernel import find_connection_file
# 0.12 uses files instead of a collection of ports
# include default IPython search path
# filefind also allows for absolute paths, in which case the search
# is ignored
try:
# XXX: the following approach will be brittle, depending on what
# connection strings will end up looking like in the future, and
# whether or not they are allowed to have spaces. I'll have to sync
# up with the IPython team to address these issues -pi
if '--profile' in s:
k,p = s.split('--profile')
k = k.lstrip().rstrip() # kernel part of the string
p = p.lstrip().rstrip() # profile part of the string
fullpath = find_connection_file(k,p)
else:
fullpath = find_connection_file(s.lstrip().rstrip())
except IOError,e:
echo(":IPython " + s + " failed", "Info")
echo("^-- failed '" + s + "' not found", "Error")
return
km = BlockingKernelManager(connection_file = fullpath)
km.load_connection_file()
else:
if s == '':
echo(":IPython 0.11 requires the full connection string")
return
loader = KeyValueConfigLoader(s.split(), aliases=kernel_aliases)
cfg = loader.load_config()['KernelApp']
try:
km = BlockingKernelManager(
shell_address=(ip, cfg['shell_port']),
sub_address=(ip, cfg['iopub_port']),
stdin_address=(ip, cfg['stdin_port']),
hb_address=(ip, cfg['hb_port']))
except KeyError,e:
echo(":IPython " +s + " failed", "Info")
echo("^-- failed --"+e.message.replace('_port','')+" not specified", "Error")
return
km.start_channels()
send = km.shell_channel.execute
# now that we're connect to an ipython kernel, activate completion
# machinery, but do so only for the local buffer if the user added the
# following line the vimrc:
# let g:ipy_completefunc = 'local'
vim.command("""
if g:ipy_completefunc == 'global'
set completefunc=CompleteIPython
elseif g:ipy_completefunc == 'local'
setl completefunc=CompleteIPython
endif
""")
# also activate GUI doc balloons if in gvim
vim.command("""
if has('balloon_eval')
set bexpr=IPythonBalloonExpr()
set ballooneval
endif
""")
set_pid()
return km
def echo(arg,style="Question"):
try:
vim.command("echohl %s" % style)
vim.command("echom \"%s\"" % arg.replace('\"','\\\"'))
vim.command("echohl None")
except vim.error:
print "-- %s" % arg
def disconnect():
"disconnect kernel manager"
# XXX: make a prompt here if this km owns the kernel
pass
def get_doc(word):
if km is None:
return ["Not connected to IPython, cannot query: %s" % word]
msg_id = km.shell_channel.object_info(word)
doc = get_doc_msg(msg_id)
# get around unicode problems when interfacing with vim
return [d.encode(vim_encoding) for d in doc]
import re
# from http://serverfault.com/questions/71285/in-centos-4-4-how-can-i-strip-escape-sequences-from-a-text-file
strip = re.compile('\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[m|K]')
def strip_color_escapes(s):
return strip.sub('',s)
def get_doc_msg(msg_id):
n = 13 # longest field name (empirically)
b=[]
try:
content = get_child_msg(msg_id)['content']
except Empty:
# timeout occurred
return ["no reply from IPython kernel"]
if not content['found']:
return b
for field in ['type_name','base_class','string_form','namespace',
'file','length','definition','source','docstring']:
c = content.get(field,None)
if c:
if field in ['definition']:
c = strip_color_escapes(c).rstrip()
s = field.replace('_',' ').title()+':'
s = s.ljust(n)
if c.find('\n')==-1:
b.append(s+c)
else:
b.append(s)
b.extend(c.splitlines())
return b
def get_doc_buffer(level=0):
# empty string in case vim.eval return None
word = vim.eval('expand("<cfile>")') or ''
doc = get_doc(word)
if len(doc) ==0:
echo(repr(word)+" not found","Error")
return
# documentation buffer name is same as the query made to ipython
vim.command('new '+word)
vim.command('setlocal modifiable noro')
# doc window quick quit keys: 'q' and 'escape'
vim.command('map <buffer> q :q<CR>')
# Known issue: to enable the use of arrow keys inside the terminal when
# viewing the documentation, comment out the next line
vim.command('map <buffer> <Esc> :q<CR>')
# and uncomment this line (which will work if you have a timoutlen set)
#vim.command('map <buffer> <Esc><Esc> :q<CR>')
b = vim.current.buffer
b[:] = None
b[:] = doc
vim.command('setlocal nomodified bufhidden=wipe')
#vim.command('setlocal previewwindow nomodifiable nomodified ro')
#vim.command('set previewheight=%d'%len(b))# go to previous window
vim.command('resize %d'%len(b))
#vim.command('pcl')
#vim.command('pedit doc')
#vim.command('normal ') # go to previous window
# use the ReST formatting that ships with stock vim
vim.command('setlocal syntax=rst')
def vim_ipython_is_open():
"""
Helper function to let us know if the vim-ipython shell is currently
visible
"""
for w in vim.windows:
if w.buffer.name is not None and w.buffer.name.endswith("vim-ipython"):
return True
return False
def update_subchannel_msgs(debug=False, force=False):
"""
Grab any pending messages and place them inside the vim-ipython shell.
This function will do nothing if the vim-ipython shell is not visible,
unless force=True argument is passed.
"""
if km is None or (not vim_ipython_is_open() and not force):
return False
msgs = km.sub_channel.get_msgs()
if debug:
#try:
# vim.command("b debug_msgs")
#except vim.error:
# vim.command("new debug_msgs")
#finally:
db = vim.current.buffer
else:
db = []
b = vim.current.buffer
startedin_vimipython = vim.eval('@%')=='vim-ipython'
if not startedin_vimipython:
# switch to preview window
vim.command(
"try"
"|silent! wincmd P"
"|catch /^Vim\%((\a\+)\)\=:E441/"
"|silent pedit +set\ ma vim-ipython"
"|silent! wincmd P"
"|endtry")
# if the current window is called 'vim-ipython'
if vim.eval('@%')=='vim-ipython':
# set the preview window height to the current height
vim.command("set pvh=" + vim.eval('winheight(0)'))
else:
# close preview window, it was something other than 'vim-ipython'
vim.command("pcl")
vim.command("silent pedit +set\ ma vim-ipython")
vim.command("wincmd P") #switch to preview window
# subchannel window quick quit key 'q'
vim.command('map <buffer> q :q<CR>')
vim.command("set bufhidden=hide buftype=nofile ft=python")
# make shift-enter and control-enter in insert mode behave same as in ipython notebook
# shift-enter send the current line, control-enter send the line
# but keeps it around for further editing.
vim.command("imap <buffer> <s-Enter> <esc>dd:python run_command('''<C-r>\"''')<CR>i")
# pkddA: paste, go up one line which is blank after run_command,
# delete it, and then back to insert mode
vim.command("imap <buffer> <c-Enter> <esc>dd:python run_command('''<C-r>\"''')<CR>pkddA")
# ctrl-C gets sent to the IPython process as a signal on POSIX
vim.command("map <buffer>  :IPythonInterrupt<cr>")
#syntax highlighting for python prompt
# QtConsole In[] is blue, but I prefer the oldschool green
# since it makes the vim-ipython 'shell' look like the holidays!
#vim.command("hi Blue ctermfg=Blue guifg=Blue")
vim.command("hi Green ctermfg=Green guifg=Green")
vim.command("hi Red ctermfg=Red guifg=Red")
vim.command("syn keyword Green 'In\ []:'")
vim.command("syn match Green /^In \[[0-9]*\]\:/")
vim.command("syn match Red /^Out\[[0-9]*\]\:/")
b = vim.current.buffer
update_occured = False
for m in msgs:
#db.append(str(m).splitlines())
s = ''
if 'msg_type' not in m['header']:
# debug information
#echo('skipping a message on sub_channel','WarningMsg')
#echo(str(m))
continue
elif m['header']['msg_type'] == 'status':
continue
elif m['header']['msg_type'] == 'stream':
s = strip_color_escapes(m['content']['data'])
elif m['header']['msg_type'] == 'pyout':
s = "Out[%d]: " % m['content']['execution_count']
s += m['content']['data']['text/plain']
elif m['header']['msg_type'] == 'pyin':
# TODO: the next line allows us to resend a line to ipython if
# %doctest_mode is on. In the future, IPython will send the
# execution_count on subchannel, so this will need to be updated
# once that happens
if 'execution_count' in m['content']:
s = "\nIn [%d]: "% m['content']['execution_count']
else:
s = "\nIn [00]: "
s += m['content']['code'].strip()
elif m['header']['msg_type'] == 'pyerr':
c = m['content']
s = "\n".join(map(strip_color_escapes,c['traceback']))
s += c['ename'] + ":" + c['evalue']
if s.find('\n') == -1:
# somewhat ugly unicode workaround from
# http://vim.1045645.n5.nabble.com/Limitations-of-vim-python-interface-with-respect-to-character-encodings-td1223881.html
if isinstance(s,unicode):
s=s.encode(vim_encoding)
b.append(s)
else:
try:
b.append(s.splitlines())
except:
b.append([l.encode(vim_encoding) for l in s.splitlines()])
update_occured = True
# make a newline so we can just start typing there
if b[-1] != '':
b.append([''])
vim.command('normal G') # go to the end of the file
if not startedin_vimipython:
vim.command('normal p') # go back to where you were
return update_occured
def get_child_msg(msg_id):
# XXX: message handling should be split into its own process in the future
while True:
# get_msg will raise with Empty exception if no messages arrive in 1 second
m= km.shell_channel.get_msg(timeout=1)
if m['parent_header']['msg_id'] == msg_id:
break
else:
#got a message, but not the one we were looking for
echo('skipping a message on shell_channel','WarningMsg')
return m
def print_prompt(prompt,msg_id=None):
"""Print In[] or In[42] style messages"""
global show_execution_count
if show_execution_count and msg_id:
# wait to get message back from kernel
try:
child = get_child_msg(msg_id)
count = child['content']['execution_count']
echo("In[%d]: %s" %(count,prompt))
except Empty:
echo("In[]: %s (no reply from IPython kernel)" % prompt)
else:
echo("In[]: %s" % prompt)
def with_subchannel(f,*args):
"conditionally monitor subchannel"
def f_with_update(*args):
try:
f(*args)
if monitor_subchannel:
update_subchannel_msgs()
except AttributeError: #if km is None
echo("not connected to IPython", 'Error')
return f_with_update
@with_subchannel
def run_this_file():
msg_id = send('run %s %s' % (run_flags, repr(vim.current.buffer.name),))
print_prompt("In[]: run %s %s" % (run_flags, repr(vim.current.buffer.name)),msg_id)
@with_subchannel
def run_this_line():
msg_id = send(vim.current.line)
print_prompt(vim.current.line, msg_id)
@with_subchannel
def run_command(cmd):
msg_id = send(cmd)
print_prompt(cmd, msg_id)
@with_subchannel
def run_these_lines():
r = vim.current.range
lines = "\n".join(vim.current.buffer[r.start:r.end+1])
msg_id = send(lines)
#alternative way of doing this in more recent versions of ipython
#but %paste only works on the local machine
#vim.command("\"*yy")
#send("'%paste')")
#reselect the previously highlighted block
vim.command("normal gv")
if not reselect:
vim.command("normal ")
#vim lines start with 1
#print "lines %d-%d sent to ipython"% (r.start+1,r.end+1)
prompt = "lines %d-%d "% (r.start+1,r.end+1)
print_prompt(prompt,msg_id)
def set_pid():
"""
Explicitly ask the ipython kernel for its pid
"""
global km, pid
lines = '\n'.join(['import os', '_pid = os.getpid()'])
msg_id = send(lines, silent=True, user_variables=['_pid'])
# wait to get message back from kernel
try:
child = get_child_msg(msg_id)
except Empty:
echo("no reply from IPython kernel")
return
pid = int(child['content']['user_variables']['_pid'])
return pid
def interrupt_kernel_hack():
"""
Sends the interrupt signal to the remote kernel. This side steps the
(non-functional) ipython interrupt mechanisms.
Only works on posix.
"""
global pid
import signal
import os
if pid is None:
# Avoid errors if we couldn't get pid originally,
# by trying to obtain it now
pid = set_pid()
if pid is None:
echo("cannot get kernel PID, Ctrl-C will not be supported")
return
echo("KeyboardInterrupt (sent to ipython: pid " +
"%i with signal %i)" % (pid, signal.SIGINT),"Operator")
try:
os.kill(pid, signal.SIGINT)
except OSError:
echo("unable to kill pid %d" % pid)
pid = None
def dedent_run_this_line():
vim.command("left")
run_this_line()
vim.command("silent undo")
def dedent_run_these_lines():
r = vim.current.range
shiftwidth = vim.eval('&shiftwidth')
count = int(vim.eval('indent(%d+1)/%s' % (r.start,shiftwidth)))
vim.command("'<,'>" + "<"*count)
run_these_lines()
vim.command("silent undo")
#def set_this_line():
# # not sure if there's a way to do this, since we have multiple clients
# send("get_ipython().shell.set_next_input(\'%s\')" % vim.current.line.replace("\'","\\\'"))
# #print "line \'%s\' set at ipython prompt"% vim.current.line
# echo("line \'%s\' set at ipython prompt"% vim.current.line,'Statement')
def toggle_reselect():
global reselect
reselect=not reselect
print "F9 will%sreselect lines after sending to ipython"% (reselect and " " or " not ")
#def set_breakpoint():
# send("__IP.InteractiveTB.pdb.set_break('%s',%d)" % (vim.current.buffer.name,
# vim.current.window.cursor[0]))
# print "set breakpoint in %s:%d"% (vim.current.buffer.name,
# vim.current.window.cursor[0])
#
#def clear_breakpoint():
# send("__IP.InteractiveTB.pdb.clear_break('%s',%d)" % (vim.current.buffer.name,
# vim.current.window.cursor[0]))
# print "clearing breakpoint in %s:%d" % (vim.current.buffer.name,
# vim.current.window.cursor[0])
#
#def clear_all_breakpoints():
# send("__IP.InteractiveTB.pdb.clear_all_breaks()");
# print "clearing all breakpoints"
#
#def run_this_file_pdb():
# send(' __IP.InteractiveTB.pdb.run(\'execfile("%s")\')' % (vim.current.buffer.name,))
# #send('run -d %s' % (vim.current.buffer.name,))
# echo("In[]: run -d %s (using pdb)" % vim.current.buffer.name)
EOF
fun! <SID>toggle_send_on_save()
if exists("s:ssos") && s:ssos == 0
let s:ssos = 1
au BufWritePost *.py :py run_this_file()
echo "Autosend On"
else
let s:ssos = 0
au! BufWritePost *.py
echo "Autosend Off"
endif
endfun
" Update the vim-ipython shell when the cursor is not moving.
" You can change how quickly this happens after you stop moving the cursor by
" setting 'updatetime' (in milliseconds). For example, to have this event
" trigger after 1 second:
"
" :set updatetime 1000
"
" NOTE: This will only be triggered once, after the first 'updatetime'
" milliseconds, *not* every 'updatetime' milliseconds. see :help CursorHold
" for more info.
"
" TODO: Make this easily configurable on the fly, so that an introspection
" buffer we may have opened up doesn't get closed just because of an idle
" event (i.e. user pressed \d and then left the buffer that popped up, but
" expects it to stay there).
au CursorHold *.*,vim-ipython :python if update_subchannel_msgs(): echo("vim-ipython shell updated (on idle)",'Operator')
" XXX: broken - cursor hold update for insert mode moves the cursor one
" character to the left of the last character (update_subchannel_msgs must be
" doing this)
"au CursorHoldI *.* :python if update_subchannel_msgs(): echo("vim-ipython shell updated (on idle)",'Operator')
" Same as above, but on regaining window focus (mostly for GUIs)
au FocusGained *.*,vim-ipython :python if update_subchannel_msgs(): echo("vim-ipython shell updated (on input focus)",'Operator')
" Update vim-ipython buffer when we move the cursor there. A message is only
" displayed if vim-ipython buffer has been updated.
au BufEnter vim-ipython :python if update_subchannel_msgs(): echo("vim-ipython shell updated (on buffer enter)",'Operator')
if g:ipy_perform_mappings != 0
map <silent> <F5> :python run_this_file()<CR>
map <silent> <S-F5> :python run_this_line()<CR>
map <silent> <F9> :python run_these_lines()<CR>
map <silent> <leader>d :py get_doc_buffer()<CR>
map <silent> <leader>s :py if update_subchannel_msgs(force=True): echo("vim-ipython shell updated",'Operator')<CR>
map <silent> <S-F9> :python toggle_reselect()<CR>
"map <silent> <C-F6> :python send('%pdb')<CR>
"map <silent> <F6> :python set_breakpoint()<CR>
"map <silent> <s-F6> :python clear_breakpoint()<CR>
"map <silent> <F7> :python run_this_file_pdb()<CR>
"map <silent> <s-F7> :python clear_all_breaks()<CR>
imap <C-F5> <C-O><F5>
imap <S-F5> <C-O><S-F5>
imap <silent> <F5> <C-O><F5>
map <C-F5> :call <SID>toggle_send_on_save()<CR>
"" Example of how to quickly clear the current plot with a keystroke
"map <silent> <F12> :python run_command("plt.clf()")<cr>
"" Example of how to quickly close all figures with a keystroke
"map <silent> <F11> :python run_command("plt.close('all')")<cr>
"pi custom
map <silent> <C-Return> :python run_this_file()<CR>
map <silent> <C-s> :python run_this_line()<CR>
imap <silent> <C-s> <C-O>:python run_this_line()<CR>
map <silent> <M-s> :python dedent_run_this_line()<CR>
vmap <silent> <C-S> :python run_these_lines()<CR>
vmap <silent> <M-s> :python dedent_run_these_lines()<CR>
map <silent> <M-c> I#<ESC>
vmap <silent> <M-c> I#<ESC>
map <silent> <M-C> :s/^\([ \t]*\)#/\1/<CR>
vmap <silent> <M-C> :s/^\([ \t]*\)#/\1/<CR>
endif
command! -nargs=* IPython :py km_from_string("<args>")
command! -nargs=0 IPythonClipboard :py km_from_string(vim.eval('@+'))
command! -nargs=0 IPythonXSelection :py km_from_string(vim.eval('@*'))
command! -nargs=0 IPythonInterrupt :py interrupt_kernel_hack()
function! IPythonBalloonExpr()
python << endpython
word = vim.eval('v:beval_text')
reply = get_doc(word)
vim.command("let l:doc = %s"% reply)
endpython
return l:doc
endfunction
fun! CompleteIPython(findstart, base)
if a:findstart
" locate the start of the word
let line = getline('.')
let start = col('.') - 1
while start > 0 && line[start-1] =~ '\k\|\.' "keyword
let start -= 1
endwhile
echo start
python << endpython
current_line = vim.current.line
endpython
return start
else
" find months matching with "a:base"
let res = []
python << endpython
base = vim.eval("a:base")
findstart = vim.eval("a:findstart")
msg_id = km.shell_channel.complete(base, current_line, vim.eval("col('.')"))
try:
m = get_child_msg(msg_id)
matches = m['content']['matches']
matches.insert(0,base) # the "no completion" version
# we need to be careful with unicode, because we can have unicode
# completions for filenames (for the %run magic, for example). So the next
# line will fail on those:
#completions= [str(u) for u in matches]
# because str() won't work for non-ascii characters
# and we also have problems with unicode in vim, hence the following:
completions = [s.encode(vim_encoding) for s in matches]
except Empty:
echo("no reply from IPython kernel")
completions=['']
## Additionally, we have no good way of communicating lists to vim, so we have
## to turn in into one long string, which can be problematic if e.g. the
## completions contain quotes. The next line will not work if some filenames
## contain quotes - but if that's the case, the user's just asking for
## it, right?
#completions = '["'+ '", "'.join(completions)+'"]'
#vim.command("let completions = %s" % completions)
## An alternative for the above, which will insert matches one at a time, so
## if there's a problem with turning a match into a string, it'll just not
## include the problematic match, instead of not including anything. There's a
## bit more indirection here, but I think it's worth it
for c in completions:
vim.command('call add(res,"'+c+'")')
endpython
"call extend(res,completions)
return res
endif
endfun