/usr/lib/python3/dist-packages/glances/exports/graph.py is in glances 2.7.1.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 | # -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# Copyright (C) 2015 Nicolargo <nicolas@nicolargo.com>
#
# Glances is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Glances is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""Graph generation class."""
import os
from glances.compat import iterkeys
from glances.logger import logger
try:
from matplotlib import __version__ as matplotlib_version
import matplotlib.pyplot as plt
except ImportError:
matplotlib_check = False
logger.warning('Cannot load Matplotlib library. Please install it using "pip install matplotlib"')
else:
matplotlib_check = True
logger.info('Load Matplotlib version %s' % matplotlib_version)
class GlancesGraph(object):
"""Thanks to this class, Glances can export history to graphs."""
def __init__(self, output_folder):
self.output_folder = output_folder
def get_output_folder(self):
"""Return the output folder where the graph are generated."""
return self.output_folder
def graph_enabled(self):
"""Return True if Glances can generate history graphs."""
return matplotlib_check
def reset(self, stats):
"""Reset all the history."""
if not self.graph_enabled():
return False
for p in stats.getAllPlugins():
h = stats.get_plugin(p).get_stats_history()
if h is not None:
stats.get_plugin(p).reset_stats_history()
return True
def get_graph_color(self, item):
"""Get the item's color."""
try:
ret = item['color']
except KeyError:
return '#FFFFFF'
else:
return ret
def get_graph_legend(self, item):
"""Get the item's legend."""
return item['description']
def get_graph_yunit(self, item, pre_label=''):
"""Get the item's Y unit."""
try:
unit = " (%s)" % item['y_unit']
except KeyError:
unit = ''
if pre_label == '':
label = ''
else:
label = pre_label.split('_')[0]
return "%s%s" % (label, unit)
def generate_graph(self, stats):
"""Generate graphs from plugins history.
Return the number of output files generated by the function.
"""
if not self.graph_enabled():
return 0
index_all = 0
for p in stats.getAllPlugins():
# History
h = stats.get_plugin(p).get_export_history()
# Current plugin item history list
ih = stats.get_plugin(p).get_items_history_list()
# Check if we must process history
if h is None or ih is None:
# History (h) not available for plugin (p)
continue
# Init graph
plt.clf()
index_graph = 0
handles = []
labels = []
for i in ih:
if i['name'] in iterkeys(h):
# The key exist
# Add the curves in the current chart
logger.debug("Generate graph: %s %s" % (p, i['name']))
index_graph += 1
# Labels
handles.append(plt.Rectangle((0, 0), 1, 1, fc=self.get_graph_color(i), ec=self.get_graph_color(i), linewidth=2))
labels.append(self.get_graph_legend(i))
# Legend
plt.ylabel(self.get_graph_yunit(i, pre_label=''))
# Curves
plt.grid(True)
# Points are stored as tuple (date, value)
x, y = zip(*h[i['name']])
plt.plot_date(x, y,
fmt='', drawstyle='default', linestyle='-',
color=self.get_graph_color(i),
xdate=True, ydate=False)
if index_graph == 1:
# Title only on top of the first graph
plt.title(p.capitalize())
else:
# The key did not exist
# Find if anothers key ends with the key
# Ex: key='tx' => 'ethernet_tx'
# Add one curve per chart
stats_history_filtered = sorted([key for key in iterkeys(h) if key.endswith('_' + i['name'])])
logger.debug("Generate graphs: %s %s" %
(p, stats_history_filtered))
if len(stats_history_filtered) > 0:
# Create 'n' graph
# Each graph iter through the stats
plt.clf()
index_item = 0
for k in stats_history_filtered:
index_item += 1
plt.subplot(
len(stats_history_filtered), 1, index_item)
# Legend
plt.ylabel(self.get_graph_yunit(i, pre_label=k))
# Curves
plt.grid(True)
# Points are stored as tuple (date, value)
x, y = zip(*h[k])
plt.plot_date(x, y,
fmt='', drawstyle='default', linestyle='-',
color=self.get_graph_color(i),
xdate=True, ydate=False)
if index_item == 1:
# Title only on top of the first graph
plt.title(p.capitalize() + ' ' + i['name'])
# Save the graph to output file
fig = plt.gcf()
fig.set_size_inches(20, 5 * index_item)
plt.xlabel('Date')
plt.savefig(
os.path.join(self.output_folder, 'glances_%s_%s.png' % (p, i['name'])), dpi=72)
index_all += 1
if index_graph > 0:
# Save the graph to output file
fig = plt.gcf()
fig.set_size_inches(20, 10)
plt.legend(handles, labels, loc=1, prop={'size': 9})
plt.xlabel('Date')
plt.savefig(os.path.join(self.output_folder, 'glances_%s.png' % p), dpi=72)
index_all += 1
plt.close()
return index_all
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