Python dates.epoch2num函数代码示例

    def plot_dataset(self, name=None, ax=None):
        """Function to plot data for a specified Data Center."""
        values = []
        times = []
        max_value = 0
        max_value_time = 0
        for record in self.dataset[:]:
            if record[0] == name:
                times.append(dt.epoch2num(record[1]))
                values.append(record[2])

                if record[2] > max_value:
                    max_value = record[2]
                    max_value_time = dt.epoch2num(record[1])
                self.dataset.remove(record)
            else:
                pass

        value_mean = sum(values) / float(len(values))
        print(
            "Data Center:{}\nMax Value:{}, {}\nAverage Value:{}\n".format(
                name, max_value, dt.num2date(max_value_time), value_mean
            )
        )

        ax.plot_date(times, values, xdate=True)

    def set_signals(self, allSignals):
        timestamp = time.time()
        if timestamp - self._timestamp > self._delayDraw:
            t1 = time.time()
            self._timestamp = timestamp

            height = SAMPLE_RATE / BINS
            height /= 1e6
            self._axes.set_color_cycle(None)

            self.__clear_plots()
            for freq, signals in allSignals:
                barsX = []
                for start, end, _level in signals:
                    tStart = epoch2num(start)
                    tEnd = epoch2num(end)
                    barsX.append([tStart, tEnd - tStart])
                colour = self._axes._get_lines.color_cycle.next()
                self._axes.broken_barh(barsX, [freq - height / 2, height],
                                       color=colour,
                                       gid='plot')
                self._axes.axhspan(freq, freq, color=colour)

            self._axes.get_figure().autofmt_xdate()
            self._axes.relim()
            self._canvas.draw()

            delay = time.time() - t1
            self._delayDraw += delay * 2.
            self._delayDraw /= 2.
            if self._delayDraw < 1. / MAX_TIMELINE_FPS:
                self._delayDraw = 1. / MAX_TIMELINE_FPS

def extract_daily_interaction(interaction):
	tweets_per_day = defaultdict(int)
	days = [mdates.epoch2num(long(el - el%SEC_IN_DAY)) for el in interaction]
	days = set(days)
	for day in days:
		tweets_per_day[day] = sum(1 for el in interaction if mdates.epoch2num(long(el - el%SEC_IN_DAY)) == day)
	return tweets_per_day

def try_to_draw_vms_cache_refresh_lines():
    if(isNetflixInternal()):
        try:
            fp = open(vmsGCReportDirectory + os.path.sep + 'vms-cache-refresh-overall-events-milliseconds')
        except IOError:
            return
        for line in fp:
            line = line.rstrip('\r\n')
            try:
                (finish_time_ms_str, duration_ms_str) = line.split()
            except ValueError:
                continue
            finish_time_ms = long(finish_time_ms_str)
            duration_ms = long(duration_ms_str)
            start_time_ms = finish_time_ms - duration_ms
            start_time_secs = start_time_ms/1000.0
            start_time_days = mdates.epoch2num(start_time_secs)
            start_time_line = lines.Line2D([start_time_days,start_time_days], [0,maxGCEventDuration], color='r')
            ax.add_line(start_time_line)
            finish_time_secs = finish_time_ms/1000.0
            finish_time_days = mdates.epoch2num(finish_time_secs)
            finish_time_line = lines.Line2D([finish_time_days,finish_time_days], [0,maxGCEventDuration], color='c')
            ax.add_line(finish_time_line)
        fp.close()
        # draw some fake lines just to get them into the legend
        fake_vms_start_line = lines.Line2D([jvmBootDays,0], [jvmBootDays,0], label='VMS cache refresh start', color='r')
        fake_vms_end_line = lines.Line2D([jvmBootDays,0], [jvmBootDays,0], label='VMS cache refresh end', color='c')
        ax.add_line(fake_vms_start_line)
        ax.add_line(fake_vms_end_line)

def Print_Packet_Details(decoded,SrcPort,DstPort,ts2):
    if timestamp:
        ts = '[%f] ' % time.time()
    else:
        ts = ''
    #print decoded['data']
    if "RCPT TO:" in decoded['data']:
	try:
		mail_try[decoded['source_address'],int(mp.epoch2num(ts2))] += 1
	except:
		mail_try[decoded['source_address'],int(mp.epoch2num(ts2))] = 1  	
	try:
		match = re.search(r"[a-zA-Z0-9_.+-][email protected][a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+", decoded['data'])		
		return '%sprotocol: %s %s:%s > %s:%s  %s RCPT TO: %s' % (ts, protocols[decoded['protocol']],decoded['source_address'],SrcPort,decoded['destination_address'], DstPort, str(datetime.datetime.utcfromtimestamp(ts2)), match.group())
    	except:
		return '%s%s:%s > %s:%s  %s RCPT TO: %s' % (ts,decoded['source_address'],SrcPort,decoded['destination_address'], DstPort, str(datetime.datetime.utcfromtimestamp(ts2)), match.group())
    if "MAIL FROM:" in decoded['data']:
    	try:
		match = re.search(r"[a-zA-Z0-9_.+-][email protected][a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+", decoded['data'])
		return '%sprotocol: %s %s:%s > %s:%s  %s MAIL FROM: %s' % (ts, protocols[decoded['protocol']],decoded['source_address'],SrcPort,decoded['destination_address'], DstPort, str(datetime.datetime.utcfromtimestamp(ts2)), match.group())
    	except:
		return '%s%s:%s > %s:%s  %s MAIL FROM: %s' % (ts,decoded['source_address'],SrcPort,decoded['destination_address'], DstPort, str(datetime.datetime.utcfromtimestamp(ts2)), match.group())
    if "From: " in decoded['data']:
    	try:
		match = re.findall(r"[a-zA-Z0-9_.+-][email protected][a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+", decoded['data'])
		return '%sprotocol: %s %s:%s > %s:%s  %s mail body from / to: %s - %s' % (ts, protocols[decoded['protocol']],decoded['source_address'],SrcPort,decoded['destination_address'], DstPort, str(datetime.datetime.utcfromtimestamp(ts2)), match[0], match[1])
    	except:
		return '%s%s:%s > %s:%s  %s mail body from / to: %s - %s' % (ts,decoded['source_address'],SrcPort,decoded['destination_address'], DstPort, str(datetime.datetime.utcfromtimestamp(ts2)), match[0], match[1])
    return " "

def trades(timeSince): # gets the innermost bid and asks and information on the most recent trade.
  adjustedTime = int(time.time()) - timeSince
  response = requests.get(URL + str(adjustedTime))
  splitResponse = response.text.splitlines()
  prices = []
  timestamps = []
  amounts = [] 
  mymax = 0

  #Only keep one of each 30 lines
  splitResponse = splitResponse[::30]  

  for i,line in enumerate(splitResponse):
    splitline = splitResponse[i].split(',') 
    timestamp = splitline[0] 
    price = round(float(splitline[1]),2)
    amount = splitline[2] 
    #print "amount: " + str(amount)
    if mymax < amount:
       mymax = amount
    timestamps.append(float(timestamp))
    print "\nEvent at time: ",mdates.epoch2num(float(timestamp))
    prices.append(float(price))
    amounts.append(float(amount)*5 )

  fig = plt.figure()
  #ax1 = plt.subplot(2,1,1)
  ax1 = plt.subplot2grid((5,4), (0,0), rowspan=4, colspan=4)

  secs = mdates.epoch2num(timestamps)
  ax1.plot_date(secs, prices, 'k-', linewidth=.7)
  ax1.grid(True)
  plt.xlabel('Date')
  plt.ylabel('Bitcoin Price')

  #ax2 = plt.subplot(2,1,2, sharex=ax1)
  ax2 = plt.subplot2grid((5,4), (4,0), sharex=ax1, rowspan=1, colspan=4)
  ax2.plot(secs, amounts)
  ax2.grid(True)
  plt.ylabel('Volume')

  #Use a DateFormatter to set the data to the correct format.
  #Choose your xtick format string
  #date_fmt = '%d-%m-%y %H:%M:%S'
  date_fmt = '%d-%m-%y %H:%M'
  date_formatter = mdates.DateFormatter(date_fmt)
  ax1.xaxis.set_major_formatter(date_formatter)

  #Tilt x-axis text to fit
  fig.autofmt_xdate()

  plt.show()

    def candlestick_chart(self, time_series, interval=40, show=False, filename='candlestick.png', volume_overlay=None):
        tz = get_localzone()
        adjusted_time_series = []
        for item in time_series:
            item[0] = epoch2num(item[0])
            adjusted_time_series.append(item)
        fig, ax = plt.subplots()
        fig.subplots_adjust(bottom=0.2)

        ax.xaxis.set_major_formatter(self._date_formatter(interval, tz=tz))
        days_interval = interval / 86400.0
        candlestick_ochl(ax, adjusted_time_series, width=(days_interval), colorup='green', colordown='red', alpha=0.9)

        ax.xaxis_date(tz=tz.zone)
        ax.autoscale_view()
        yticks = ax.get_yticks()
        x_start = min(yticks) - ((max(yticks) - min(yticks)) * 0.60)
        plt.ylim([x_start,max(yticks)])
        ax.grid(True)
        plt.setp( plt.gca().get_xticklabels(), rotation=45, horizontalalignment='right')
        if volume_overlay != None:
            # Add a seconds axis for the volume overlay
            ax2 = ax.twinx()

            yticks = ax.get_yticks()
            print('yticks', yticks)
            # set the position of ax2 so that it is short (y2=0.32) but otherwise the same size as ax
            ax2.set_position(matplotlib.transforms.Bbox([[0.125,0.2],[0.9,0.42]]))
            #print(days_interval * len(adjusted_time_series))
            #ax2.set_position([0.125, 0.2, 0.8, 0.2])

            # get data from candlesticks for a bar plot
            dates = [x[0] for x in adjusted_time_series]
            dates = np.asarray(dates)
            volume = [x[1] for x in volume_overlay]
            volume = np.asarray(volume)

            ax2.bar(dates,volume,color='#aaaaaa',width=(days_interval),align='center',linewidth=0.0,alpha=0.8)

            #scale the x-axis tight
            #ax2.set_xlim(min(dates),max(dates))
            # the y-ticks for the bar were too dense, keep only every third one
            ax2yticks = ax2.get_yticks()
            #print('yticks', ax2yticks)
            #print('yticks2', ax2yticks[::3])
            ax2.set_yticks(ax2yticks[::3])

            ax2.yaxis.set_label_position("right")
            ax2.set_ylabel('Volume', size=20)

            # format the x-ticks with a human-readable date.
            #xt = ax.get_xticks()
            #new_xticks = [datetime.date.isoformat(num2date(d)) for d in xt]
            #ax.set_xticklabels(new_xticks,rotation=45, horizontalalignment='right')

        if show:
            plt.show()
        else:
            plt.savefig(const.DATA_DIR + '/' + filename, bbox_inches='tight')
            plt.close()

def graph_animate(i):
	read_file = open('mcxlist.txt', 'r')
	sep_file = read_file.read().split('\n')
	x = []
	y = []

	for pair in sep_file:
		XY = pair.split(' ')
		if len(XY) > 1: 
			x.append(float(XY[0]))
			y.append(float(XY[1]))

	ax1.clear()

	x = np.array(x)
	y = np.array(y)
	read_file.close()
	
	#rotates timestamps 
	plt.setp(plt.xticks()[1], rotation=30)

	#shows grid
	ax1.grid(b=True, which='major', color='r')
	plt.title('CFS Betagraph V0.0.1', color='w')
	#plt x, and y cords
	ax1.plot_date(md.epoch2num(x), y,'r',tz=est,linewidth=2,xdate=True,marker='o')

    def histogram_data(self, resolution = 'month', combined = True, start = None, stop = None):
        s_date = start if start else self.start_date()
        e_date = stop if stop else self.end_date()

        s, e = self.search_date_range(s_date, e_date)
        flat_messages = {}
        if combined:
            flat_messages =  {'Combined':[timestamp(x[0].date()) for x in self._sms_history[s:e]]}
        else:
            for participant in self.participants + ['Me']:
                flat_messages[participant] = [timestamp(x[0].date()) for x in self._sms_history[s:e] if x[1][1] == participant]
        
        plt_data = []
        for history in flat_messages.items():
            label = history[0]
            mpl_data = mdates.epoch2num(history[1])
            plt_data += [(label, mpl_data)]   

        elapsed_time = e_date - s_date
        if  resolution == 'day':
            num_buckets = elapsed_time.days
        elif resolution == 'year':
            num_buckets = int(elapsed_time.days / 365) + 1
        else:
            num_buckets = int(elapsed_time.days / 30) + 1
        
        data_sets = []
        for person in plt_data:
            y, bin_edges = np.histogram(person[1], bins = num_buckets)
            bin_centers = 0.5*(bin_edges[1:]+bin_edges[:-1])

            data_sets.append((person[0], y, bin_centers))
            
        return data_sets

def doplot(series):
    """
    Do the actual plotting of the series
    Needs data with the given dtypes to be able to address the
    'date', 'humidity', 'temperature' columns
    """
    fig = pl.figure(figsize=(11.27, 8.69))
    dates = [num2date(epoch2num(s[0]['date']), tz) for s in series]

    ax1 = fig.add_subplot(211)
    for i, s in enumerate(series):
        ax1.plot_date(dates[i], s[0]['humidity'], '-', label=s[1])
    ax1.set_ylabel("Humidity (%)")
    ax1.legend(loc='best')
    fig.autofmt_xdate()

    ax2 = fig.add_subplot(212)
    signs = ['s', 'x', 'o']
    for i, s in enumerate(series):
        ax2.plot_date(dates[i], s[0]['temperature'], signs[i % len(signs)], label=s[1])
    ax2.set_ylabel("Temperature (C)")
    ax2.legend(loc='best')
    fig.autofmt_xdate()

    ax1.set_title("%s -> %s" %(dates[0][0], dates[0][-1]))

    def info(self):  # General info of the data

        f_name = self.filename
        st = self.data['ST']
        et = self.data['ET']
        d_format = '%H:%M:%S'

        # start date and time formatting
        s_day = epoch2num(st)  # num of days since epoch
        s_date = datetime.date.fromordinal(s_day)  # returns formatted date YYYY-MM-DD
        s_time = time.gmtime(st)  # returns struct_time of date and time values
        e_time = time.gmtime(et)

        # Range in seconds
        st_sec = s_time.tm_hour * 3600 + s_time.tm_min * 60 + s_time.tm_sec
        et_sec = e_time.tm_hour * 3600 + e_time.tm_min * 60 + e_time.tm_sec
        dsec = et_sec - st_sec

        start_str = time.strftime(d_format, s_time)
        end_str = time.strftime(d_format, e_time)

        info_d = {'Filename': f_name, 'Date': s_date, 'Start': start_str, 'End': end_str, 'dt': dsec}
        '''
        print('Filename: ', f_name)
        print('Date: ', s_date, ', epoch[day]: ', s_day[0])
        print('GMT:')
        print('Start Time : ', time.strftime(d_format, s_time), ', End Time: ', time.strftime(d_format, e_time))
        '''
        return info_d

def saveGraph(f):
    if f != "null":
        matfirstbeat = mdates.epoch2num(firstbeat.keys())
        plt.plot_date(matfirstbeat, firstbeat.values(), 'bs', linewidth=0.25, label='firstbeat heartrate')
    matstressapp = mdates.epoch2num(stress.keys())
    matbasispeak = mdates.epoch2num(basispeak.keys())
    plt.plot_date(matbasispeak, basispeak.values(), 'gs', linewidth=0.25, label='Basis Peak Heartrate')
    plt.plot_date(matstressapp, stress.values(), 'ro', linewidth=3.0, label='stress app annotation heartrate')

    plt.xlabel('Date')
    plt.ylabel('Heartrate')
    plt.title('Subject %s' % subjectnum)
    plt.ylim([-5, 200])
    plt.legend()
    plt.gca().xaxis.set_major_formatter(mdates.DateFormatter('%m%d'))
    plt.gca().xaxis.set_major_locator(mdates.DayLocator())
    plt.savefig('C:/Users/jfzabalx/Pictures/Stress_Study_Heartrate/{0}.png'.format(subjectnum))
    plt.close()

	def transform_date(self, inputdate):
		"""Parameters:
		
			inputdate: Unix time - int representing number of seconds from Epoch
			
		Returns date in matplotlib date format, that is float number of days since 0001
		"""

		return mdates.epoch2num(inputdate)

def divide_fit(X, y, ax):
    n = len(X)
    X1 = X[: n/2]
    X2 = X[n/2:]
    y1 = y[: n/2]
    y2 = y[n/2:]
    lr1 = linear_model.LinearRegression()
    lr1.fit(X1, y1)
    if lr1.coef_ < 0:
        divide_fit(X1, y1, ax)
    else:
        X_ts_track1 = mdate.epoch2num(np.array(X1) / 1000)
        ax.plot_date(X_ts_track1, lr1.predict(np.array(X1).reshape(-1, 1))[:], marker='o', ms=1, c='red')
    lr2 = linear_model.LinearRegression()
    lr2.fit(X2, y2)
    if lr2.coef_ < 0:
        divide_fit(X2, y2, ax)
    else:
        X_ts_track2 = mdate.epoch2num(np.array(X2)/1000)
        ax.plot_date(X_ts_track2, lr2.predict(np.array(X2).reshape(-1, 1))[:], marker='o', ms=1, c='red')

def _dt_to_float_ordinal(dt):
    """
    Convert :mod:`datetime` to the Gregorian date as UTC float days,
    preserving hours, minutes, seconds and microseconds.  Return value
    is a :func:`float`.
    """
    if isinstance(dt, (np.ndarray, Series)) and com.is_datetime64_ns_dtype(dt):
        base = dates.epoch2num(dt.asi8 / 1.0E9)
    else:
        base = dates.date2num(dt)
    return base