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annotate Generic/utils.py @ 21:f7e0cc58737f

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Default interface in readFile method
author Miguel Ángel Bárcena Rodríguez <miguelangel@obraencurso.es>
date Sun, 14 Sep 2014 17:23:02 +0200
parents a7b9f7e7dfa4
children 65e7ae0d0e63
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1 #!/usr/bin/python
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2 # -*- coding: utf-8 -*-
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3 ## File utils.py
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4 ## This file is part of pyArq-Presupuestos.
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5 ##
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6 ## Copyright (C) 2010-2013 Miguel Ángel Bárcena Rodríguez
1
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7 ## <miguelangel@obraencurso.es>
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8 ##
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9 ## pyArq-Presupuestos is free software: you can redistribute it and/or modify
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10 ## it under the terms of the GNU General Public License as published by
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11 ## the Free Software Foundation, either version 3 of the License, or
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12 ## (at your option) any later version.
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13 ##
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14 ## pyArq-Presupuestos is distributed in the hope that it will be useful,
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15 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 ## GNU General Public License for more details.
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18 ##
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19 ## You should have received a copy of the GNU General Public License
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20 ## along with this program. If not, see <http://www.gnu.org/licenses/>.
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21
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22 # Modules
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23 import re
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24 import imghdr
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25
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26 # add wmf to imghdr
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27 def test_wmf(h, f):
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28 """wmf image library"""
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29 if h[:6] == "\xd7\xcd\xc6\x9a\x00\x00":
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30 return 'wmf'
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31 imghdr.tests.append(test_wmf)
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32
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33 # add dxf to imghdr
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34 def test_dxf(h, f):
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35 """AutoCAD DXF: Drawing Interchange Format"""
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36 if isinstance(f,file):
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37 _pos = f.tell()
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38 f.seek(0)
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39 _h = f.read(128)
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40 f.seek(-32, 2)
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41 _l = f.read(32)
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42 f.seek(_pos)
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43 else:
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44 _h = h
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45 _l = h[-32:]
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46 _h = _h.replace("\r","")
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47 _l = _l.replace("\r","")
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48 if (" 0\nSECTION\n 2\nHEADER\n" in _h or\
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49 " 0\nSECTION\n 2\nCLASSES\n" in _h or\
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50 " 0\nSECTION\n 2\nTABLES\n" in _h or\
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51 " 0\nSECTION\n 2\nBLOCKS\n" in _h or\
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52 " 0\nSECTION\n 2\nENTITIES\n" in _h or\
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53 " 0\nSECTION\n 2\nOBJECTS\n" in _h or\
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54 " 0\nSECTION\n 2\nTHUMBNAILIMAGE\n" in _h) and \
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55 _l[-19:] == " 0\nENDSEC\n 0\nEOF\n":
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56 return 'dxf'
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57 imghdr.tests.append(test_dxf)
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58
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59
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60 def mapping(string, tuple):
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61 """mapping(string, tuple)
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62
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63 string: a message string
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64 tuple: a truple with string items
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65 Return the string replacing the $[n] words whith its corresponding value
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66 from the tuple.
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67 It is used because the gettext module can not #-#supotr#-# strings as:
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68 "Invalid type (%s) in record: %s" %(type, record)
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69 """
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70 for _index in range(len(tuple)):
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71 string = string.replace("$" + str(_index+1), str(tuple[_index]))
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72 return string
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73
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74 def eliminate_duplicates(list):
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75 """eliminate_duplicates(list)
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76
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77 Return a copy of the list without duplicate values
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78 """
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79 _result = [ ]
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80 for item in list:
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81 if item not in _result:
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82 _result.append(item)
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83 return _result
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84
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85 def is_valid_code(code):
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86 """is_valid_code(code)
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87
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88 code: a string code
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89 Funtion to test if a record code is valid
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90 A valid code must fulfill:
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91 - Be a not empty string
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92 - The valid characters are the defined in MSdos 6.0 including .$#%&_
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93 What it means? I am not sure, so I test if all the character
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94 are in cp850
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95 - Cannot contain the following characters
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96 <~> separator of records if FIEBDC-3
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97 <|> separator of fields if FIEBDC-3
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98 <\> separator of subfield in FIEBDC-3
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99 <\t> tab -> control character
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100 < > space -> control character
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101 <\n> end of line -> control character
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102 <\r> end of line -> control character
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103 - Cannot end with <#> or <##>, root and chapter code record
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104 It return a tuple (is_valid, code)
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105 is_valid (True/False)
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106 True: the code is valid
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107 False: the code is not valid
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108 code(False/code)
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109 False: the code is not valid and can not be corrected
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110 code: the code or the corrected code
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111 """
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112 _is_valid = True
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113 if not isinstance(code, str):
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114 print "Not a string, code:", code, type(code)
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115 return False, False
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116 if code == "":
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117
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118 return False, False
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119 try:
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120 _unicode_code = unicode(code, "utf8",'replace')
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121 _code_utf8 = _unicode_code.encode("utf8",'replace')
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122 _code_cp850 = _unicode_code.encode("cp850",'replace')
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123 _unicode_code = unicode(_code_cp850, "cp850",'replace')
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124
1
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125 except UnicodeError:
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126 print "Unicode Error, code:", code
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127 return False, False
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128 if _code_utf8 != code:
17
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129 print "Not in cp950, code:", code
1
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130 _is_valid = False
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131 if _code_utf8 == "":
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132 return False, False
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133 code = _code_utf8
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134 _code2 = re.sub("[\t \n\r~|\\\]","",code)
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135 if _code2 != code:
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parents: 1
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136 print "Control characters in code:", code
1
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parents:
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137 if _code2 == "":
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parents:
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138 return False, False
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139 _is_valid = False
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parents:
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140 code = _code2
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141 if code[-1] == "#":
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142 print "# in code:", code
1
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143 _is_valid = False
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parents:
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144 while code[-1] == "#":
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145 code = code[:-1]
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parents:
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146 if code == "":
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parents: 1
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147 print "Empty code"
1
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148 return False, False
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149 return _is_valid, code
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150
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151 def getFiletype(filename, h=None):
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152 """getFiletype(filename, h=None):
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153
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154 filename: the filename to test
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155 h: raw string, if h is not None the filename is ignored and h is assumed
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parents:
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156 to contain the byte stream to test
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157 """
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158 _type = imghdr.what(filename, h)
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159 _image_types = ["rgb", "gif", "pbm", "pgm", "ppm", "tiff", "rast", "xbm",
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160 "jpeg", "bmp", "png", "wmf"]
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parents:
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161 if _type in _image_types:
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162 return "image"
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163 elif _type == "dxf":
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parents:
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164 return "dxf"
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parents:
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165 ## _video_types = ["avi", "mpg", "mkv", "ogm"]
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166 ## elif _type in _video_types:
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167 ## return "video"
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168 ## elif _type == "pdf":
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169 ## return "pdf"
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parents:
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170 ## elif _type == "ppt" or _type == "odp":
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171 ## return "presentation"
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172 else:
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173 return None