# -*- coding: utf-8 -*- # ----------------------------------------------------------------------------- # Copyright (c) 2009- Spyder Kernels Contributors # # Licensed under the terms of the MIT License # (see spyder_kernels/__init__.py for details) # ----------------------------------------------------------------------------- """ File used to start kernels for the IPython Console """ # Standard library imports import os import os.path as osp import sys import site from traitlets import DottedObjectName import ipykernel # Local imports from spyder_kernels.utils.misc import is_module_installed from spyder_kernels.utils.mpl import ( MPL_BACKENDS_FROM_SPYDER, INLINE_FIGURE_FORMATS) PY2 = sys.version[0] == '2' IPYKERNEL_6 = ipykernel.__version__[0] >= '6' def import_spydercustomize(): """Import our customizations into the kernel.""" here = osp.dirname(__file__) parent = osp.dirname(here) customize_dir = osp.join(parent, 'customize') # Remove current directory from sys.path to prevent kernel # crashes when people name Python files or modules with # the same name as standard library modules. # See spyder-ide/spyder#8007 while '' in sys.path: sys.path.remove('') # Import our customizations site.addsitedir(customize_dir) import spydercustomize # noqa # Remove our customize path from sys.path try: sys.path.remove(customize_dir) except ValueError: pass def sympy_config(mpl_backend): """Sympy configuration""" if mpl_backend is not None: lines = """ from sympy.interactive import init_session init_session() %matplotlib {0} """.format(mpl_backend) else: lines = """ from sympy.interactive import init_session init_session() """ return lines def kernel_config(): """Create a config object with IPython kernel options.""" from IPython.core.application import get_ipython_dir from traitlets.config.loader import Config, load_pyconfig_files # ---- IPython config ---- try: profile_path = osp.join(get_ipython_dir(), 'profile_default') cfg = load_pyconfig_files(['ipython_config.py', 'ipython_kernel_config.py'], profile_path) except: cfg = Config() # ---- Spyder config ---- spy_cfg = Config() # Enable/disable certain features for testing testing = os.environ.get('SPY_TESTING') == 'True' if testing: # Don't load nor save history in our IPython consoles. spy_cfg.HistoryAccessor.enabled = False # Until we implement Issue 1052 spy_cfg.InteractiveShell.xmode = 'Plain' # Jedi completer. It's only available in Python 3 jedi_o = os.environ.get('SPY_JEDI_O') == 'True' if not PY2: spy_cfg.IPCompleter.use_jedi = jedi_o # Clear terminal arguments input. # This needs to be done before adding the exec_lines that come from # Spyder, to avoid deleting the sys module if users want to import # it through them. # See spyder-ide/spyder#15788 clear_argv = "import sys; sys.argv = ['']; del sys" spy_cfg.IPKernelApp.exec_lines = [clear_argv] # Set our runfile in builtins here to prevent other packages shadowing it. # This started to be a problem since IPykernel 6.3.0. if not PY2: spy_cfg.IPKernelApp.exec_lines.append( "import builtins; " "builtins.runfile = builtins.spyder_runfile; " "del builtins.spyder_runfile; del builtins" ) # Prevent other libraries to change the breakpoint builtin. # This started to be a problem since IPykernel 6.3.0. if sys.version_info[0:2] >= (3, 7): spy_cfg.IPKernelApp.exec_lines.append( "import sys; import pdb; " "sys.breakpointhook = pdb.set_trace; " "del sys; del pdb" ) # Run lines of code at startup run_lines_o = os.environ.get('SPY_RUN_LINES_O') if run_lines_o is not None: spy_cfg.IPKernelApp.exec_lines += ( [x.strip() for x in run_lines_o.split(';')] ) # Load %autoreload magic spy_cfg.IPKernelApp.exec_lines.append( "get_ipython().kernel._load_autoreload_magic()") # Load wurlitzer extension spy_cfg.IPKernelApp.exec_lines.append( "get_ipython().kernel._load_wurlitzer()") # Default inline backend configuration # This is useful to have when people doesn't # use our config system to configure the # inline backend but want to use # '%matplotlib inline' at runtime spy_cfg.InlineBackend.rc = { 'figure.figsize': (6.0, 4.0), # 72 dpi matches SVG/qtconsole. # This only affects PNG export, as SVG has no dpi setting. 'figure.dpi': 72, # 12pt labels get cutoff on 6x4 logplots, so use 10pt. 'font.size': 10, # 10pt still needs a little more room on the xlabel 'figure.subplot.bottom': .125, # Play nicely with any background color. 'figure.facecolor': 'white', 'figure.edgecolor': 'white' } # Pylab configuration mpl_backend = None if is_module_installed('matplotlib'): # Set Matplotlib backend with Spyder options pylab_o = os.environ.get('SPY_PYLAB_O') backend_o = os.environ.get('SPY_BACKEND_O') if pylab_o == 'True' and backend_o is not None: mpl_backend = MPL_BACKENDS_FROM_SPYDER[backend_o] # Inline backend configuration if mpl_backend == 'inline': # Figure format format_o = os.environ.get('SPY_FORMAT_O') formats = INLINE_FIGURE_FORMATS if format_o is not None: spy_cfg.InlineBackend.figure_format = formats[format_o] # Resolution resolution_o = os.environ.get('SPY_RESOLUTION_O') if resolution_o is not None: spy_cfg.InlineBackend.rc['figure.dpi'] = float( resolution_o) # Figure size width_o = float(os.environ.get('SPY_WIDTH_O')) height_o = float(os.environ.get('SPY_HEIGHT_O')) if width_o is not None and height_o is not None: spy_cfg.InlineBackend.rc['figure.figsize'] = (width_o, height_o) # Print figure kwargs bbox_inches_o = os.environ.get('SPY_BBOX_INCHES_O') bbox_inches = 'tight' if bbox_inches_o == 'True' else None spy_cfg.InlineBackend.print_figure_kwargs.update( {'bbox_inches': bbox_inches}) else: # Set Matplotlib backend to inline for external kernels. # Fixes issue 108 mpl_backend = 'inline' # Automatically load Pylab and Numpy, or only set Matplotlib # backend autoload_pylab_o = os.environ.get('SPY_AUTOLOAD_PYLAB_O') == 'True' command = "get_ipython().kernel._set_mpl_backend('{0}', {1})" spy_cfg.IPKernelApp.exec_lines.append( command.format(mpl_backend, autoload_pylab_o)) # Enable Cython magic run_cython = os.environ.get('SPY_RUN_CYTHON') == 'True' if run_cython and is_module_installed('Cython'): spy_cfg.IPKernelApp.exec_lines.append('%reload_ext Cython') # Run a file at startup use_file_o = os.environ.get('SPY_USE_FILE_O') run_file_o = os.environ.get('SPY_RUN_FILE_O') if use_file_o == 'True' and run_file_o is not None: if osp.exists(run_file_o): spy_cfg.IPKernelApp.file_to_run = run_file_o # Autocall autocall_o = os.environ.get('SPY_AUTOCALL_O') if autocall_o is not None: spy_cfg.ZMQInteractiveShell.autocall = int(autocall_o) # To handle the banner by ourselves in IPython 3+ spy_cfg.ZMQInteractiveShell.banner1 = '' # Greedy completer greedy_o = os.environ.get('SPY_GREEDY_O') == 'True' spy_cfg.IPCompleter.greedy = greedy_o # Sympy loading sympy_o = os.environ.get('SPY_SYMPY_O') == 'True' if sympy_o and is_module_installed('sympy'): lines = sympy_config(mpl_backend) spy_cfg.IPKernelApp.exec_lines.append(lines) # Disable the new mechanism to capture and forward low-level output # in IPykernel 6. For that we have Wurlitzer. if not PY2: spy_cfg.IPKernelApp.capture_fd_output = False # Merge IPython and Spyder configs. Spyder prefs will have prevalence # over IPython ones cfg._merge(spy_cfg) return cfg def varexp(line): """ Spyder's variable explorer magic Used to generate plots, histograms and images of the variables displayed on it. """ ip = get_ipython() #analysis:ignore funcname, name = line.split() try: import guiqwt.pyplot as pyplot except: import matplotlib.pyplot as pyplot pyplot.figure(); getattr(pyplot, funcname[2:])(ip.kernel._get_current_namespace()[name]) pyplot.show() def main(): # Remove this module's path from sys.path: try: sys.path.remove(osp.dirname(__file__)) except ValueError: pass try: locals().pop('__file__') except KeyError: pass __doc__ = '' __name__ = '__main__' # Import our customizations into the kernel import_spydercustomize() # Remove current directory from sys.path to prevent kernel # crashes when people name Python files or modules with # the same name as standard library modules. # See spyder-ide/spyder#8007 while '' in sys.path: sys.path.remove('') # Main imports from ipykernel.kernelapp import IPKernelApp from spyder_kernels.console.kernel import SpyderKernel class SpyderKernelApp(IPKernelApp): if IPYKERNEL_6: outstream_class = DottedObjectName( 'spyder_kernels.console.outstream.TTYOutStream') def init_pdb(self): """ This method was added in IPykernel 5.3.1 and it replaces the debugger used by the kernel with a new class introduced in IPython 7.15 during kernel's initialization. Therefore, it doesn't allow us to use our debugger. """ pass # Fire up the kernel instance. kernel = SpyderKernelApp.instance() kernel.kernel_class = SpyderKernel try: kernel.config = kernel_config() except: pass kernel.initialize() # Set our own magics kernel.shell.register_magic_function(varexp) # Set Pdb class to be used by %debug and %pdb. # This makes IPython consoles to use the class defined in our # sitecustomize instead of their default one. import pdb kernel.shell.InteractiveTB.debugger_cls = pdb.Pdb # Start the (infinite) kernel event loop. kernel.start() if __name__ == '__main__': main()