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
|
# (c) 2014, Brian Coca <bcoca@ansible.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
from __future__ import absolute_import
import math
import collections
from ansible import errors
def unique(a):
if isinstance(a,collections.Hashable):
c = set(a)
else:
c = []
for x in a:
if x not in c:
c.append(x)
return c
def intersect(a, b):
if isinstance(a,collections.Hashable) and isinstance(b,collections.Hashable):
c = set(a) & set(b)
else:
c = unique(filter(lambda x: x in b, a))
return c
def difference(a, b):
if isinstance(a,collections.Hashable) and isinstance(b,collections.Hashable):
c = set(a) - set(b)
else:
c = unique(filter(lambda x: x not in b, a))
return c
def symmetric_difference(a, b):
if isinstance(a,collections.Hashable) and isinstance(b,collections.Hashable):
c = set(a) ^ set(b)
else:
c = unique(filter(lambda x: x not in intersect(a,b), union(a,b)))
return c
def union(a, b):
if isinstance(a,collections.Hashable) and isinstance(b,collections.Hashable):
c = set(a) | set(b)
else:
c = unique(a + b)
return c
def min(a):
_min = __builtins__.get('min')
return _min(a);
def max(a):
_max = __builtins__.get('max')
return _max(a);
def isnotanumber(x):
try:
return math.isnan(x)
except TypeError:
return False
def logarithm(x, base=math.e):
try:
if base == 10:
return math.log10(x)
else:
return math.log(x, base)
except TypeError, e:
raise errors.AnsibleFilterError('log() can only be used on numbers: %s' % str(e))
def power(x, y):
try:
return math.pow(x, y)
except TypeError, e:
raise errors.AnsibleFilterError('pow() can only be used on numbers: %s' % str(e))
def inversepower(x, base=2):
try:
if base == 2:
return math.sqrt(x)
else:
return math.pow(x, 1.0/float(base))
except TypeError, e:
raise errors.AnsibleFilterError('root() can only be used on numbers: %s' % str(e))
class FilterModule(object):
''' Ansible math jinja2 filters '''
def filters(self):
return {
# general math
'isnan': isnotanumber,
'min' : min,
'max' : max,
# exponents and logarithms
'log': logarithm,
'pow': power,
'root': inversepower,
# set theory
'unique' : unique,
'intersect': intersect,
'difference': difference,
'symmetric_difference': symmetric_difference,
'union': union,
}
|
