# Path: pathpy/Log.py
# class Log:
#     """ A simple logging class, that allows to select what messages should
#         be recorded in the output, and where these message should be directed.
#     """
# 
#     ## the output stream to which log entries will be written
#     output_stream = sys.stdout
# 
#     ## The minimum severity level of messages to be logged
#     min_severity  = Severity.INFO
# 
# 
#     @staticmethod
#     def setMinSeverity(severity):
#         """ Sets the minimum sveerity level a message
#         needs to have in order to be recorded in the output stream.
#         By default, any message which has a severity of at least
#         Severity.INFO will be written to the output stream. All messages
#         with lower priority will be surpressed.
#         """
#         Log.min_severity = severity
# 
# 
#     @staticmethod
#     def setOutputStream(stream):
#         """ Sets the output stream to which all messages will be
#             written. By default, this is sys.stdout, but it can be
#             changed in order to redirect the log to a logfile.
#         """
#         output_stream = stream
# 
# 
#     @staticmethod
#     def add(msg, severity=Severity.INFO):
#         """ Adds a message with the given severity to the log. This message will be written
#             to the log output stream, which by default is sys.stdout. A newline character
#             will be added to the message by default.
#         """
#         if severity >= Log.min_severity:
#             ts = time.strftime("%Y-%m-%d %H:%M:%S", time.gmtime())
#             Log.output_stream.write(ts + ' [' + str(severity) + ']\t' + msg + '\n')
#             Log.output_stream.flush()
# 
# Path: pathpy/Log.py
# class Severity(enum.IntEnum):
#     """ An enumeration that can be used to indicate
#         the severity of log messages, and which can be
#         used tpo filter messages based on severities.
#     """
# 
#     ## Error messages
#     ERROR = 4
# 
#     ## Warning messages
#     WARNING = 3
# 
#     ## Informational messages (default minimum level)
#     INFO = 2
# 
#     ## Messages regarding timing and performance
#     TIMING = 1
# 
#     ## Debug messages (really verbose)
#     DEBUG = 0


import numpy as _np
import sys as _sys
import collections as _co
import bisect as _bs
import datetime as _dt
import time as _t
import pathpy.Paths
        import os as _os
from pathpy.Log import Log
from pathpy.Log import Severity
            @param maxlines: limit reading of file to certain number of lines, default sys.maxsize

        """
        assert (filename != ''), 'Empty filename given'
        
        # Read header
        with open(filename, 'r') as f:
            tedges = []
        
            header = f.readline()
            header = header.split(sep)

            # If header columns are included, arbitrary column orders are supported
            time_ix = -1
            source_ix = -1
            mid_ix = -1
            weight_ix = -1
            target_ix = -1
            for i in range(len(header)):
                header[i] = header[i].strip()
                if header[i] == 'node1' or header[i] == 'source':
                    source_ix = i
                elif header[i] == 'node2' or header[i] == 'target':
                    target_ix = i
                elif header[i] == 'time' or header[i] == 'timestamp':
                    time_ix = i

            assert (source_ix >= 0 and target_ix >= 0), "Detected invalid header columns: %s" % header

            if time_ix<0:

# Path: pathpy/Log.py
# class Log:
#     """ A simple logging class, that allows to select what messages should
#         be recorded in the output, and where these message should be directed.
#     """
# 
#     ## the output stream to which log entries will be written
#     output_stream = sys.stdout
# 
#     ## The minimum severity level of messages to be logged
#     min_severity  = Severity.INFO
# 
# 
#     @staticmethod
#     def setMinSeverity(severity):
#         """ Sets the minimum sveerity level a message
#         needs to have in order to be recorded in the output stream.
#         By default, any message which has a severity of at least
#         Severity.INFO will be written to the output stream. All messages
#         with lower priority will be surpressed.
#         """
#         Log.min_severity = severity
# 
# 
#     @staticmethod
#     def setOutputStream(stream):
#         """ Sets the output stream to which all messages will be
#             written. By default, this is sys.stdout, but it can be
#             changed in order to redirect the log to a logfile.
#         """
#         output_stream = stream
# 
# 
#     @staticmethod
#     def add(msg, severity=Severity.INFO):
#         """ Adds a message with the given severity to the log. This message will be written
#             to the log output stream, which by default is sys.stdout. A newline character
#             will be added to the message by default.
#         """
#         if severity >= Log.min_severity:
#             ts = time.strftime("%Y-%m-%d %H:%M:%S", time.gmtime())
#             Log.output_stream.write(ts + ' [' + str(severity) + ']\t' + msg + '\n')
#             Log.output_stream.flush()
# 
# Path: pathpy/Log.py
# class Severity(enum.IntEnum):
#     """ An enumeration that can be used to indicate
#         the severity of log messages, and which can be
#         used tpo filter messages based on severities.
#     """
# 
#     ## Error messages
#     ERROR = 4
# 
#     ## Warning messages
#     WARNING = 3
# 
#     ## Informational messages (default minimum level)
#     INFO = 2
# 
#     ## Messages regarding timing and performance
#     TIMING = 1
# 
#     ## Debug messages (really verbose)
#     DEBUG = 0


# Path: pathpy/TemporalNetwork.py
import numpy as _np
import sys as _sys
import collections as _co
import bisect as _bs
import datetime as _dt
import time as _t
import pathpy.Paths
        import os as _os
from pathpy.Log import Log
from pathpy.Log import Severity

            @param maxlines: limit reading of file to certain number of lines, default sys.maxsize

        """
        assert (filename != ''), 'Empty filename given'
        
        # Read header
        with open(filename, 'r') as f:
            tedges = []
        
            header = f.readline()
            header = header.split(sep)

            # If header columns are included, arbitrary column orders are supported
            time_ix = -1
            source_ix = -1
            mid_ix = -1
            weight_ix = -1
            target_ix = -1
            for i in range(len(header)):
                header[i] = header[i].strip()
                if header[i] == 'node1' or header[i] == 'source':
                    source_ix = i
                elif header[i] == 'node2' or header[i] == 'target':
                    target_ix = i
                elif header[i] == 'time' or header[i] == 'timestamp':
                    time_ix = i

            assert (source_ix >= 0 and target_ix >= 0), "Detected invalid header columns: %s" % header

            if time_ix<0:

                Log.add('No time stamps found in data, assuming consecutive links', Severity.WARNING)