Source Code for Module kenozooid.util

 1  # 
 2  # Kenozooid - dive planning and analysis toolbox. 
 3  # 
 4  # Copyright (C) 2009-2019 by Artur Wroblewski <wrobell@riseup.net> 
 5  # 
 6  # This program is free software: you can redistribute it and/or modify 
 7  # it under the terms of the GNU General Public License as published by 
 8  # the Free Software Foundation, either version 3 of the License, or 
 9  # (at your option) any later version. 
10  # 
11  # This program is distributed in the hope that it will be useful, 
12  # but WITHOUT ANY WARRANTY; without even the implied warranty of 
13  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
14  # GNU General Public License for more details. 
15  # 
16  # You should have received a copy of the GNU General Public License 
17  # along with this program.  If not, see <http://www.gnu.org/licenses/>. 
18  # 
19   
20  """ 
21  Kenozooid utility funtions. 
22  """ 
23   
24  import math 
25  import operator 
26  import string 
27   
28  from cytoolz.curried import accumulate 
29   
30  # format for dive time presentation 
31  FMT_DIVETIME = '%Y-%m-%d %H:%M' 
32   
33 -def min2str(t): 
34      """ 
35      Convert decimal minutes (i.e. 38.84) into MM:SS string (i.e. 38:50). 
36   
37      >>> min2str(38.84) 
38      '38:50' 
39   
40      >>> min2str(67.20) 
41      '67:12' 
42      """ 
43      return '%02d:%02d' % (int(t), math.modf(t)[0] * 60) 
44   
45   
46 -class _Formatter(string.Formatter): 
47      """ 
48      Formatter, which formats 'None' as empty string. 
49      """ 
50 -    def format_field(self, value, fs): 
51          """ 
52          Format null value as empty string. If value is not null, then 
53          render it using default method of the formatter. 
54          """ 
55          if value is None: 
56              return '' 
57          else: 
58              return super(_Formatter, self).format_field(value, fs) 
59   
60   
61  nformat = _Formatter().format 
62   
63   
64 -def pipe(data, *gens): 
65      """ 
66      Pipe data through list of geneators. 
67       
68      :Parameters: 
69       data 
70          Data to pipe through the generators. 
71       gens 
72          List of generators to process the data. 
73      """ 
74      for g in gens: 
75          data = g(data) 
76      return data 
77   
78   
79  # Return empty iterator if ``it`` is None, otherwise return ``it`` 
80  # itself. 
81  nit = lambda it: () if it is None else it 
82   
83  cumsum = accumulate(operator.add) 
84   
85  # vim: sw=4:et:ai 
86