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def info_formatter(info): """Produce a sequence of formatted lines from info. `info` is a sequence of pairs (label, data). The produced lines are nicely formatted, ready to print. """ label_len = max([len(l) for l, _d in info]) for label, data in info: if data == []: data ...
def write(self, msg): """Write a line of debug output.""" if self.should('pid'): msg = "pid %5d: %s" % (os.getpid(), msg) self.output.write(msg+"\n") self.output.flush()
def _config_changed(self, name, old, new): """Update all the class traits having ``config=True`` as metadata. For any class trait with a ``config`` metadata attribute that is ``True``, we update the trait with the value of the corresponding config entry. """ # Get all tr...
def class_get_help(cls, inst=None): """Get the help string for this class in ReST format. If `inst` is given, it's current trait values will be used in place of class defaults. """ assert inst is None or isinstance(inst, cls) cls_traits = cls.class_traits(config=...
def class_get_trait_help(cls, trait, inst=None): """Get the help string for a single trait. If `inst` is given, it's current trait values will be used in place of the class default. """ assert inst is None or isinstance(inst, cls) lines = [] header = "--%...
def class_config_section(cls): """Get the config class config section""" def c(s): """return a commented, wrapped block.""" s = '\n\n'.join(wrap_paragraphs(s, 78)) return '# ' + s.replace('\n', '\n# ') # section header breaker = '#' + '-'*78 ...
def _walk_mro(cls): """Walk the cls.mro() for parent classes that are also singletons For use in instance() """ for subclass in cls.mro(): if issubclass(cls, subclass) and \ issubclass(subclass, SingletonConfigurable) and \ subclass !...
def clear_instance(cls): """unset _instance for this class and singleton parents. """ if not cls.initialized(): return for subclass in cls._walk_mro(): if isinstance(subclass._instance, cls): # only clear instances that are instances ...
def instance(cls, *args, **kwargs): """Returns a global instance of this class. This method create a new instance if none have previously been created and returns a previously created instance is one already exists. The arguments and keyword arguments passed to this method are passed ...
def configure(self, options, conf): """Configure plugin. """ if not self.can_configure: return self.enabled = options.detailedErrors self.conf = conf
def formatFailure(self, test, err): """Add detail from traceback inspection to error message of a failure. """ ec, ev, tb = err tbinfo = inspect_traceback(tb) test.tbinfo = tbinfo return (ec, '\n'.join([str(ev), tbinfo]), tb)
def crash_handler_lite(etype, evalue, tb): """a light excepthook, adding a small message to the usual traceback""" traceback.print_exception(etype, evalue, tb) from IPython.core.interactiveshell import InteractiveShell if InteractiveShell.initialized(): # we are in a Shell environment, give...
def make_report(self,traceback): """Return a string containing a crash report.""" sec_sep = self.section_sep report = ['*'*75+'\n\n'+'IPython post-mortem report\n\n'] rpt_add = report.append rpt_add(sys_info()) try: config = pformat(self.app.config) ...
def setvar(parser, token): """ {% setvar <var_name> to <var_value> %} """ try: setvar, var_name, to_, var_value = token.split_contents() except ValueError: raise template.TemplateSyntaxError('Invalid arguments for %r' % token.split_contents()[0]) return SetVarNode(var_name, var_value)
def call_handlers(self, msg): """ Reimplemented to emit signals instead of making callbacks. """ # Emit the generic signal. self.message_received.emit(msg) # Emit signals for specialized message types. msg_type = msg['header']['msg_type'] signal = getattr(self, m...
def call_handlers(self, msg): """ Reimplemented to emit signals instead of making callbacks. """ # Emit the generic signal. self.message_received.emit(msg) # Emit signals for specialized message types. msg_type = msg['header']['msg_type'] signal = getattr(self, ms...
def flush(self): """ Reimplemented to ensure that signals are dispatched immediately. """ super(QtSubSocketChannel, self).flush() QtCore.QCoreApplication.instance().processEvents()
def call_handlers(self, msg): """ Reimplemented to emit signals instead of making callbacks. """ # Emit the generic signal. self.message_received.emit(msg) # Emit signals for specialized message types. msg_type = msg['header']['msg_type'] if msg_type == 'input_re...
def start_kernel(self, *args, **kw): """ Reimplemented for proper heartbeat management. """ if self._shell_channel is not None: self._shell_channel.reset_first_reply() super(QtKernelManager, self).start_kernel(*args, **kw) self.started_kernel.emit()
def start_channels(self, *args, **kw): """ Reimplemented to emit signal. """ super(QtKernelManager, self).start_channels(*args, **kw) self.started_channels.emit()
def shell_channel(self): """ Reimplemented for proper heartbeat management. """ if self._shell_channel is None: self._shell_channel = super(QtKernelManager, self).shell_channel self._shell_channel.first_reply.connect(self._first_reply) return self._shell_channel
def restore_bytes(nb): """Restore bytes of image data from unicode-only formats. Base64 encoding is handled elsewhere. Bytes objects in the notebook are always b64-encoded. We DO NOT encode/decode around file formats. """ for ws in nb.worksheets: for cell in ws.cells: if ce...
def _join_lines(lines): """join lines that have been written by splitlines() Has logic to protect against `splitlines()`, which should have been `splitlines(True)` """ if lines and lines[0].endswith(('\n', '\r')): # created by splitlines(True) return u''.join(lines) else: ...
def rejoin_lines(nb): """rejoin multiline text into strings For reversing effects of ``split_lines(nb)``. This only rejoins lines that have been split, so if text objects were not split they will pass through unchanged. Used when reading JSON files that may have been passed through sp...
def base64_decode(nb): """Restore all bytes objects in the notebook from base64-encoded strings. Note: This is never used """ for ws in nb.worksheets: for cell in ws.cells: if cell.cell_type == 'code': for output in cell.outputs: if 'png' in o...
def base64_encode(nb): """Base64 encode all bytes objects in the notebook. These will be b64-encoded unicode strings Note: This is never used """ for ws in nb.worksheets: for cell in ws.cells: if cell.cell_type == 'code': for output in cell.outputs: ...
def read(self, fp, **kwargs): """Read a notebook from a file like object""" nbs = fp.read() if not py3compat.PY3 and not isinstance(nbs, unicode): nbs = py3compat.str_to_unicode(nbs) return self.reads(nbs, **kwargs)
def write(self, nb, fp, **kwargs): """Write a notebook to a file like object""" nbs = self.writes(nb,**kwargs) if not py3compat.PY3 and not isinstance(nbs, unicode): # this branch is likely only taken for JSON on Python 2 nbs = py3compat.str_to_unicode(nbs) return...
def get_mirrors(hostname=None): """Return the list of mirrors from the last record found on the DNS entry:: >>> from pip.index import get_mirrors >>> get_mirrors() ['a.pypi.python.org', 'b.pypi.python.org', 'c.pypi.python.org', 'd.pypi.python.org'] Originally written for the distutils2 pro...
def read_no_interrupt(p): """Read from a pipe ignoring EINTR errors. This is necessary because when reading from pipes with GUI event loops running in the background, often interrupts are raised that stop the command from completing.""" import errno try: return p.read() except IOEr...
def process_handler(cmd, callback, stderr=subprocess.PIPE): """Open a command in a shell subprocess and execute a callback. This function provides common scaffolding for creating subprocess.Popen() calls. It creates a Popen object and then calls the callback with it. Parameters ---------- cmd...
def getoutput(cmd): """Return standard output of executing cmd in a shell. Accepts the same arguments as os.system(). Parameters ---------- cmd : str A command to be executed in the system shell. Returns ------- stdout : str """ out = process_handler(cmd, lambda p: p.co...
def getoutputerror(cmd): """Return (standard output, standard error) of executing cmd in a shell. Accepts the same arguments as os.system(). Parameters ---------- cmd : str A command to be executed in the system shell. Returns ------- stdout : str stderr : str """ o...
def arg_split(s, posix=False, strict=True): """Split a command line's arguments in a shell-like manner. This is a modified version of the standard library's shlex.split() function, but with a default of posix=False for splitting, so that quotes in inputs are respected. if strict=False, then any er...
def collector(): """TestSuite replacement entry point. Use anywhere you might use a unittest.TestSuite. The collector will, by default, load options from all config files and execute loader.loadTestsFromNames() on the configured testNames, or '.' if no testNames are configured. """ # plugins tha...
def compress_dhist(dh): """Compress a directory history into a new one with at most 20 entries. Return a new list made from the first and last 10 elements of dhist after removal of duplicates. """ head, tail = dh[:-10], dh[-10:] newhead = [] done = set() for h in head: if h in ...
def magics_class(cls): """Class decorator for all subclasses of the main Magics class. Any class that subclasses Magics *must* also apply this decorator, to ensure that all the methods that have been decorated as line/cell magics get correctly registered in the class instance. This is necessary becaus...
def record_magic(dct, magic_kind, magic_name, func): """Utility function to store a function as a magic of a specific kind. Parameters ---------- dct : dict A dictionary with 'line' and 'cell' subdicts. magic_kind : str Kind of magic to be stored. magic_name : str Key to sto...
def _method_magic_marker(magic_kind): """Decorator factory for methods in Magics subclasses. """ validate_type(magic_kind) # This is a closure to capture the magic_kind. We could also use a class, # but it's overkill for just that one bit of state. def magic_deco(arg): call = lambda f...
def _function_magic_marker(magic_kind): """Decorator factory for standalone functions. """ validate_type(magic_kind) # This is a closure to capture the magic_kind. We could also use a class, # but it's overkill for just that one bit of state. def magic_deco(arg): call = lambda f, *...
def lsmagic_docs(self, brief=False, missing=''): """Return dict of documentation of magic functions. The return dict has the keys 'line' and 'cell', corresponding to the two types of magics we support. Each value is a dict keyed by magic name whose value is the function docstring. If a ...
def register(self, *magic_objects): """Register one or more instances of Magics. Take one or more classes or instances of classes that subclass the main `core.Magic` class, and register them with IPython to use the magic functions they provide. The registration process will then ensur...
def register_function(self, func, magic_kind='line', magic_name=None): """Expose a standalone function as magic function for IPython. This will create an IPython magic (line, cell or both) from a standalone function. The functions should have the following signatures: * For l...
def define_magic(self, name, func): """[Deprecated] Expose own function as magic function for IPython. Example:: def foo_impl(self, parameter_s=''): 'My very own magic!. (Use docstrings, IPython reads them).' print 'Magic function. Passed parameter is betwee...
def format_latex(self, strng): """Format a string for latex inclusion.""" # Characters that need to be escaped for latex: escape_re = re.compile(r'(%|_|\$|#|&)',re.MULTILINE) # Magic command names as headers: cmd_name_re = re.compile(r'^(%s.*?):' % ESC_MAGIC, ...
def parse_options(self, arg_str, opt_str, *long_opts, **kw): """Parse options passed to an argument string. The interface is similar to that of getopt(), but it returns back a Struct with the options as keys and the stripped argument string still as a string. arg_str is quoted ...
def default_option(self, fn, optstr): """Make an entry in the options_table for fn, with value optstr""" if fn not in self.lsmagic(): error("%s is not a magic function" % fn) self.options_table[fn] = optstr
def page_guiref(arg_s=None): """Show a basic reference about the GUI Console.""" from IPython.core import page page.page(gui_reference, auto_html=True)
def get_member(thing_obj, member_string): """Get a member from an object by (string) name""" mems = {x[0]: x[1] for x in inspect.getmembers(thing_obj)} if member_string in mems: return mems[member_string]
def func_from_string(callable_str): """Return a live function from a full dotted path. Must be either a plain function directly in a module, a class function, or a static function. (No modules, classes, or instance methods, since those can't be called as tasks.)""" components = callable_str.split('.')...
def task_with_callable(the_callable, label=None, schedule=DEFAULT_SCHEDULE, userdata=None, pk_override=None): """Factory function to create a properly initialized task.""" task = Task() if isinstance(the_callable, str): if pk_override is not None: components = the_callable.split('.') ...
def taskinfo_with_label(label): """Return task info dictionary from task label. Internal function, pretty much only used in migrations since the model methods aren't there.""" task = Task.objects.get(label=label) info = json.loads(task._func_info) return info
def func_from_info(self): """Find and return a callable object from a task info dictionary""" info = self.funcinfo functype = info['func_type'] if functype in ['instancemethod', 'classmethod', 'staticmethod']: the_modelclass = get_module_member_by_dottedpath(info['class_path'...
def run_tasks(cls): """Internal task-runner class method, called by :py:func:`sisy.consumers.run_heartbeat`""" now = timezone.now() tasks = cls.objects.filter(enabled=True) for task in tasks: if task.next_run == HAS_NOT_RUN: task.calc_next_run() if...
def calc_next_run(self): """Calculate next run time of this task""" base_time = self.last_run if self.last_run == HAS_NOT_RUN: if self.wait_for_schedule is False: self.next_run = timezone.now() self.wait_for_schedule = False # reset so we don't run on ...
def submit(self, timestamp): """Internal instance method to submit this task for running immediately. Does not handle any iteration, end-date, etc., processing.""" Channel(RUN_TASK_CHANNEL).send({'id':self.pk, 'ts': timestamp.timestamp()})
def run(self, message): """Internal instance method run by worker process to actually run the task callable.""" the_callable = self.func_from_info() try: task_message = dict( task=self, channel_message=message, ) the_callable(ta...
def run_asap(self): """Instance method to run this task immediately.""" now = timezone.now() self.last_run = now self.calc_next_run() self.save() self.submit(now)
def run_iterations(cls, the_callable, iterations=1, label=None, schedule='* * * * * *', userdata = None, run_immediately=False, delay_until=None): """Class method to run a callable with a specified number of iterations""" task = task_with_callable(the_callable, label=label, schedule=schedule, userdata=u...
def run_once(cls, the_callable, userdata=None, delay_until=None): """Class method to run a one-shot task, immediately.""" cls.run_iterations(the_callable, userdata=userdata, run_immediately=True, delay_until=delay_until)
def find_url_file(self): """Set the url file. Here we don't try to actually see if it exists for is valid as that is hadled by the connection logic. """ config = self.config # Find the actual controller key file if not self.url_file: self.url_file = o...
def load_connector_file(self): """load config from a JSON connector file, at a *lower* priority than command-line/config files. """ self.log.info("Loading url_file %r", self.url_file) config = self.config with open(self.url_file) as f: d = js...
def bind_kernel(self, **kwargs): """Promote engine to listening kernel, accessible to frontends.""" if self.kernel_app is not None: return self.log.info("Opening ports for direct connections as an IPython kernel") kernel = self.kernel kwargs...
def pid_exists(pid): """Check whether pid exists in the current process table.""" if not isinstance(pid, int): raise TypeError('an integer is required') if pid < 0: return False try: os.kill(pid, 0) except OSError: e = sys.exc_info()[1] return e.errno == errno...
def get_disk_usage(path): """Return disk usage associated with path.""" st = os.statvfs(path) free = (st.f_bavail * st.f_frsize) total = (st.f_blocks * st.f_frsize) used = (st.f_blocks - st.f_bfree) * st.f_frsize percent = usage_percent(used, total, _round=1) # NB: the percentage is -5% than...
def timid(ctxt, test, key=None, check=False, exts=None): """ Execute a test described by a YAML file. :param ctxt: A ``timid.context.Context`` object. :param test: The name of a YAML file containing the test description. Note that the current working directory set up ...
def _processor(args): """ A ``cli_tools`` processor function that interfaces between the command line and the ``timid()`` function. This function is responsible for allocating a ``timid.context.Context`` object and initializing the activated extensions, and for calling those extensions' ``final...
def create_lang_instance(var_map = None): """ >>> lang_instance = create_lang_instance() >>> lang_instance.aml_evaluate(lang_instance.aml_compile('1 = 1')) True >>> li = create_lang_instance() >>> c = li.aml_compile >>> e = li.aml_evaluate >>> p = li.aml_translate_python >>> s = li.aml_translate_sql >>> u = l...
def create_interrupt_event(): """ Create an interrupt event handle. The parent process should use this static method for creating the interrupt event that is passed to the child process. It should store this handle and use it with ``send_interrupt`` to interrupt the child proces...
def run(self): """ Run the poll loop. This method never returns. """ try: from _winapi import WAIT_OBJECT_0, INFINITE except ImportError: from _subprocess import WAIT_OBJECT_0, INFINITE # Build the list of handle to listen on. handles = [] ...
def initialize(): """ Function to initialize settings from command line and/or custom settings file :return: Returns str with operation type """ if len(sys.argv) == 1: usage() sys.exit() command = _get_command(sys.argv[1]) try: opts, args = getopt.getopt(sys.argv[2:...
def create_typestr2type_dicts(dont_include_in_type2typestr=["lambda"]): """Return dictionaries mapping lower case typename (e.g. 'tuple') to type objects from the types package, and vice versa.""" typenamelist = [tname for tname in dir(types) if tname.endswith("Type")] typestr2type, type2typestr = {}, {...
def is_type(obj, typestr_or_type): """is_type(obj, typestr_or_type) verifies if obj is of a certain type. It can take strings or actual python types for the second argument, i.e. 'tuple'<->TupleType. 'all' matches all types. TODO: Should be extended for choosing more than one type.""" if typestr_or...
def dict_dir(obj): """Produce a dictionary of an object's attributes. Builds on dir2 by checking that a getattr() call actually succeeds.""" ns = {} for key in dir2(obj): # This seemingly unnecessary try/except is actually needed # because there is code out there with metaclasses that ...
def filter_ns(ns, name_pattern="*", type_pattern="all", ignore_case=True, show_all=True): """Filter a namespace dictionary by name pattern and item type.""" pattern = name_pattern.replace("*",".*").replace("?",".") if ignore_case: reg = re.compile(pattern+"$", re.I) else: reg...
def list_namespace(namespace, type_pattern, filter, ignore_case=False, show_all=False): """Return dictionary of all objects in a namespace dictionary that match type_pattern and filter.""" pattern_list=filter.split(".") if len(pattern_list) == 1: return filter_ns(namespace, name_pattern=pattern_l...
def mutex_opts(dict,ex_op): """Check for presence of mutually exclusive keys in a dict. Call: mutex_opts(dict,[[op1a,op1b],[op2a,op2b]...]""" for op1,op2 in ex_op: if op1 in dict and op2 in dict: raise ValueError,'\n*** ERROR in Arguments *** '\ 'Options '+op1+' and '+...
def map_method(method,object_list,*argseq,**kw): """map_method(method,object_list,*args,**kw) -> list Return a list of the results of applying the methods to the items of the argument sequence(s). If more than one sequence is given, the method is called with an argument list consisting of the correspo...
def popkey(dct,key,default=NotGiven): """Return dct[key] and delete dct[key]. If default is given, return it if dct[key] doesn't exist, otherwise raise KeyError. """ try: val = dct[key] except KeyError: if default is NotGiven: raise else: return def...
def show(close=None): """Show all figures as SVG/PNG payloads sent to the IPython clients. Parameters ---------- close : bool, optional If true, a ``plt.close('all')`` call is automatically issued after sending all the figures. If this is set, the figures will entirely removed from th...
def draw_if_interactive(): """ Is called after every pylab drawing command """ # signal that the current active figure should be sent at the end of # execution. Also sets the _draw_called flag, signaling that there will be # something to send. At the end of the code execution, a separate call ...
def flush_figures(): """Send all figures that changed This is meant to be called automatically and will call show() if, during prior code execution, there had been any calls to draw_if_interactive. This function is meant to be used as a post_execute callback in IPython, so user-caused errors a...
def send_figure(fig): """Draw the given figure and send it as a PNG payload. """ fmt = InlineBackend.instance().figure_format data = print_figure(fig, fmt) # print_figure will return None if there's nothing to draw: if data is None: return mimetypes = { 'png' : 'image/png', 'svg' : '...
def load_extension(self, module_str): """Load an IPython extension by its module name. If :func:`load_ipython_extension` returns anything, this function will return that object. """ from IPython.utils.syspathcontext import prepended_to_syspath if module_str not in sys.m...
def unload_extension(self, module_str): """Unload an IPython extension by its module name. This function looks up the extension's name in ``sys.modules`` and simply calls ``mod.unload_ipython_extension(self)``. """ if module_str in sys.modules: mod = sys.modules[modu...
def install_extension(self, url, filename=None): """Download and install an IPython extension. If filename is given, the file will be so named (inside the extension directory). Otherwise, the name from the URL will be used. The file must have a .py or .zip extension; otherwise,...
def externals_finder(dirname, filename): """Find any 'svn:externals' directories""" found = False f = open(filename,'rt') for line in iter(f.readline, ''): # can't use direct iter! parts = line.split() if len(parts)==2: kind,length = parts data = f.read(int(len...
def random_ports(port, n): """Generate a list of n random ports near the given port. The first 5 ports will be sequential, and the remaining n-5 will be randomly selected in the range [port-2*n, port+2*n]. """ for i in range(min(5, n)): yield port + i for i in range(n-5): yield ...
def init_webapp(self): """initialize tornado webapp and httpserver""" self.web_app = NotebookWebApplication( self, self.kernel_manager, self.notebook_manager, self.cluster_manager, self.log, self.base_project_url, self.webapp_settings ) if self.certfi...
def _handle_sigint(self, sig, frame): """SIGINT handler spawns confirmation dialog""" # register more forceful signal handler for ^C^C case signal.signal(signal.SIGINT, self._signal_stop) # request confirmation dialog in bg thread, to avoid # blocking the App thread = thr...
def _confirm_exit(self): """confirm shutdown on ^C A second ^C, or answering 'y' within 5s will cause shutdown, otherwise original SIGINT handler will be restored. This doesn't work on Windows. """ # FIXME: remove this delay when pyzmq dependency is >= 2...
def cleanup_kernels(self): """shutdown all kernels The kernels will shutdown themselves when this process no longer exists, but explicit shutdown allows the KernelManagers to cleanup the connection files. """ self.log.info('Shutting down kernels') km = self.kerne...
def price_options(S=100.0, K=100.0, sigma=0.25, r=0.05, days=260, paths=10000): """ Price European and Asian options using a Monte Carlo method. Parameters ---------- S : float The initial price of the stock. K : float The strike price of the option. sigma : float Th...
def multiple_replace(dict, text): """ Replace in 'text' all occurences of any key in the given dictionary by its corresponding value. Returns the new string.""" # Function by Xavier Defrang, originally found at: # http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/81330 # Create a regular ex...
def cwd_filt(depth): """Return the last depth elements of the current working directory. $HOME is always replaced with '~'. If depth==0, the full path is returned.""" cwd = os.getcwdu().replace(HOME,"~") out = os.sep.join(cwd.split(os.sep)[-depth:]) return out or os.sep
def cwd_filt2(depth): """Return the last depth elements of the current working directory. $HOME is always replaced with '~'. If depth==0, the full path is returned.""" full_cwd = os.getcwdu() cwd = full_cwd.replace(HOME,"~").split(os.sep) if '~' in cwd and len(cwd) == depth+1: depth +=...
def update_prompt(self, name, new_template=None): """This is called when a prompt template is updated. It processes abbreviations used in the prompt template (like \#) and calculates how many invisible characters (ANSI colour escapes) the resulting prompt contains. It is...
def _render(self, name, color=True, **kwargs): """Render but don't justify, or update the width or txtwidth attributes. """ if name == 'rewrite': return self._render_rewrite(color=color) if color: scheme = self.color_scheme_table.active_colors ...
def _render_rewrite(self, color=True): """Render the ---> rewrite prompt.""" if color: scheme = self.color_scheme_table.active_colors # We need a non-input version of these escapes color_prompt = scheme.in_prompt.replace("\001","").replace("\002","") color...
def render(self, name, color=True, just=None, **kwargs): """ Render the selected prompt. Parameters ---------- name : str Which prompt to render. One of 'in', 'in2', 'out', 'rewrite' color : bool If True (default), include ANSI escape sequence...