Source code for pm4py.objects.log.exporter.xes.variants.line_by_line

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import gzip
import pkgutil
from enum import Enum
from io import BytesIO

from pm4py.objects.log.util import xes as xes_util
from pm4py.util import exec_utils, constants
from xml.sax.saxutils import escape as sax_escape, quoteattr

[docs]class Parameters(Enum): COMPRESS = "compress" SHOW_PROGRESS_BAR = "show_progress_bar" ENCODING = "encoding"
# defines correspondence between Python types and XES types __TYPE_CORRESPONDENCE = { "str": xes_util.TAG_STRING, "int": xes_util.TAG_INT, "float": xes_util.TAG_FLOAT, "datetime": xes_util.TAG_DATE, "Timestamp": xes_util.TAG_DATE, "bool": xes_util.TAG_BOOLEAN, "dict": xes_util.TAG_LIST, "numpy.int64": xes_util.TAG_INT, "numpy.float64": xes_util.TAG_FLOAT, "numpy.datetime64": xes_util.TAG_DATE } # if a type is not found in the previous list, then default to string __DEFAULT_TYPE = xes_util.TAG_STRING def __get_xes_attr_type(attr_name, attr_type): """ Transform a Python attribute type (e.g. str, datetime) into a XES attribute type (e.g. string, date) Parameters ---------- attr_name Name of the attribute attr_type: Python attribute type """ if attr_name == xes_util.DEFAULT_NAME_KEY: return xes_util.TAG_STRING elif attr_type in __TYPE_CORRESPONDENCE: attr_type_xes = __TYPE_CORRESPONDENCE[attr_type] else: attr_type_xes = __DEFAULT_TYPE return attr_type_xes def __get_xes_attr_value(attr_value, attr_type_xes): """ Transform an attribute value from Python format to XES format (the type is provided as argument) Parameters ---------- attr_value: XES attribute value attr_type_xes: XES attribute type """ if attr_type_xes == xes_util.TAG_DATE: return attr_value.isoformat() elif attr_type_xes == xes_util.TAG_BOOLEAN: return str(attr_value).lower() return str(attr_value)
[docs]def get_tab_indent(n): """ Get the desidered number of indentations as string Parameters ------------- n Number of indentations Returns ------------- str_tab_indent Desidered number of indentations as string """ return "".join(["\t"] * n)
[docs]def escape(stru): """ XML-escape a string Parameters ---------------- stru String to be escaped Returns ---------------- escaped_stru Escaped string """ return quoteattr(stru)
[docs]def export_attribute(attr_name, attr_value, indent_level): """ Exports an attribute Parameters -------------- attr_name Name of the attribute attr_value Value of the attribute indent_level Level of indentation Returns -------------- stru String representing the content of the attribute """ ret = [] if attr_name is not None and attr_value is not None: attr_type = __get_xes_attr_type(attr_name, type(attr_value).__name__) if not attr_type == xes_util.TAG_LIST: attr_value = __get_xes_attr_value(attr_value, attr_type) ret.append(get_tab_indent( indent_level) + "<%s key=%s value=%s />\n" % (attr_type, escape(attr_name), escape(attr_value))) else: if attr_value[xes_util.KEY_VALUE] is None: # list ret.append(get_tab_indent(indent_level) + "<list key=%s>\n" % (escape(attr_name))) ret.append(get_tab_indent(indent_level + 1) + "<values>\n") for subattr in attr_value[xes_util.KEY_CHILDREN]: ret.append(export_attribute(subattr[0], subattr[1], indent_level + 2)) ret.append(get_tab_indent(indent_level + 1) + "</values>\n") ret.append(get_tab_indent(indent_level) + "</list>\n") else: # nested attribute this_value = attr_value[xes_util.KEY_VALUE] this_type = __get_xes_attr_type(attr_name, type(this_value).__name__) this_value = __get_xes_attr_value(this_value, this_type) ret.append(get_tab_indent( indent_level) + "<%s key=%s value=%s>\n" % (this_type, escape(attr_name), escape(this_value))) for subattr_name, subattr_value in attr_value[xes_util.KEY_CHILDREN].items(): ret.append(export_attribute(subattr_name, subattr_value, indent_level + 1)) ret.append("</%s>\n" % this_type) return "".join(ret)
[docs]def export_trace_line_by_line(trace, fp_obj, encoding): """ Exports the content of a trace line-by-line to a file object Parameters ----------------- trace Trace fp_obj File object encoding Encoding """ fp_obj.write((get_tab_indent(1) + "<trace>\n").encode(encoding)) for attr_name, attr_value in trace.attributes.items(): fp_obj.write(export_attribute(attr_name, attr_value, 2).encode(encoding)) for event in trace: fp_obj.write((get_tab_indent(2) + "<event>\n").encode(encoding)) for attr_name, attr_value in event.items(): fp_obj.write(export_attribute(attr_name, attr_value, 3).encode(encoding)) fp_obj.write((get_tab_indent(2) + "</event>\n").encode(encoding)) fp_obj.write((get_tab_indent(1) + "</trace>\n").encode(encoding))
[docs]def export_log_line_by_line(log, fp_obj, encoding, parameters=None): """ Exports the contents of the log line-by-line to a file object Parameters -------------- log Event log fp_obj File object encoding Encoding parameters Parameters of the algorithm """ if parameters is None: parameters = {} show_progress_bar = exec_utils.get_param_value(Parameters.SHOW_PROGRESS_BAR, parameters, True) progress = None if pkgutil.find_loader("tqdm") and show_progress_bar: from import tqdm progress = tqdm(total=len(log), desc="exporting log, completed traces :: ") fp_obj.write(("<?xml version=\"1.0\" encoding=\"" + encoding + "\" ?>\n").encode( encoding)) fp_obj.write(("<log "+xes_util.TAG_VERSION+"=\""+xes_util.VALUE_XES_VERSION+"\" "+xes_util.TAG_FEATURES+"=\""+xes_util.VALUE_XES_FEATURES+"\" "+xes_util.TAG_XMLNS+"=\""+xes_util.VALUE_XMLNS+"\">\n").encode(encoding)) for ext_name, ext_value in log.extensions.items(): fp_obj.write((get_tab_indent(1) + "<extension name=\"%s\" prefix=\"%s\" uri=\"%s\" />\n" % ( ext_name, ext_value[xes_util.KEY_PREFIX], ext_value[xes_util.KEY_URI])).encode(encoding)) for clas_name, clas_attributes in log.classifiers.items(): fp_obj.write((get_tab_indent(1) + "<classifier name=\"%s\" keys=\"%s\" />\n" % ( clas_name, " ".join(clas_attributes))).encode(encoding)) for attr_name, attr_value in log.attributes.items(): fp_obj.write(export_attribute(attr_name, attr_value, 1).encode(encoding)) for scope in log.omni_present: fp_obj.write((get_tab_indent(1) + "<global scope=\"%s\">\n" % (scope)).encode(encoding)) for attr_name, attr_value in log.omni_present[scope].items(): fp_obj.write(export_attribute(attr_name, attr_value, 2).encode(encoding)) fp_obj.write((get_tab_indent(1) + "</global>\n").encode(encoding)) for trace in log: export_trace_line_by_line(trace, fp_obj, encoding) if progress is not None: progress.update() # gracefully close progress bar if progress is not None: progress.close() del progress fp_obj.write("</log>\n".encode(encoding))
[docs]def apply(log, output_file_path, parameters=None): """ Exports a XES log using a non-standard exporter (classifiers, lists, nested attributes, globals, extensions are not supported) Parameters ------------ log Event log output_file_path Path to the XES file parameters Parameters """ if parameters is None: parameters = {} encoding = exec_utils.get_param_value(Parameters.ENCODING, parameters, constants.DEFAULT_ENCODING) compress = exec_utils.get_param_value(Parameters.COMPRESS, parameters, output_file_path.lower().endswith(".gz")) if compress: if not output_file_path.lower().endswith(".gz"): output_file_path = output_file_path + ".gz" f =, mode="wb") else: f = open(output_file_path, "wb") export_log_line_by_line(log, f, encoding, parameters=parameters) f.close()
[docs]def export_log_as_string(log, parameters=None): """ Export a log into a string Parameters ----------- log: :class:`pm4py.log.log.EventLog` PM4PY log parameters Parameters of the algorithm Returns ----------- logString Log as a string """ if parameters is None: parameters = {} encoding = exec_utils.get_param_value(Parameters.ENCODING, parameters, constants.DEFAULT_ENCODING) compress = exec_utils.get_param_value(Parameters.COMPRESS, parameters, False) b = BytesIO() if compress: d = gzip.GzipFile(fileobj=b, mode="wb") else: d = b export_log_line_by_line(log, d, encoding, parameters=parameters) if compress: d.close() return b.getvalue()