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annotate Generic/utils.py @ 25:189f8274aecd

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author Miguel Ángel Bárcena Rodríguez <miguelangel@obraencurso.es>
date Mon, 20 May 2019 13:18:33 +0200
parents 65e7ae0d0e63
children 16f91684686b
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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) 2010-2019 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 import os.path
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26
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27 # add svg to imghdr
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28 def test_svg(h, f):
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29 """SVG """
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30 if isinstance(f,file):
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31 _pos = f.tell()
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32 f.seek(0)
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33 _h = f.read(32)
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34 f.seek(-32, 2)
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35 _l = f.read(32)
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36 f.seek(_pos)
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37 else:
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38 _h = h
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39 _l = h[-32:]
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40 if "<?xml" in _h and "</svg>" in _l:
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41 return 'svg'
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42 imghdr.tests.append(test_svg)
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43
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44 # add ico to imghdr
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45 def test_ico(h, f):
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46 """ico image file"""
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47 if h[:4] == "\x00\x00\x01\x00":
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48 return 'ico'
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49 imghdr.tests.append(test_ico)
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50
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51 # add wmf to imghdr
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52 def test_pdf(h, f):
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53 """pdf file"""
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54 if h[:4] == "%PDF":
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55 return 'pdf'
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56 imghdr.tests.append(test_pdf)
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57
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58 # add wmf to imghdr
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59 def test_wmf(h, f):
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60 """wmf image library"""
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61 if h[:6] == "\xd7\xcd\xc6\x9a\x00\x00":
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62 return 'wmf'
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63 imghdr.tests.append(test_wmf)
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64
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65 # add dxf to imghdr
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66 def test_dxf(h, f):
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67 """AutoCAD DXF: Drawing Interchange Format"""
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68 if isinstance(f,file):
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69 _pos = f.tell()
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70 f.seek(0)
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71 _h = f.read(128)
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72 f.seek(-32, 2)
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73 _l = f.read(32)
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74 f.seek(_pos)
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75 else:
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76 _h = h
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77 _l = h[-32:]
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78 _h = _h.replace("\r","")
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79 _l = _l.replace("\r","")
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80 if (" 0\nSECTION\n 2\nHEADER\n" in _h or\
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81 " 0\nSECTION\n 2\nCLASSES\n" in _h or\
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82 " 0\nSECTION\n 2\nTABLES\n" in _h or\
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83 " 0\nSECTION\n 2\nBLOCKS\n" in _h or\
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84 " 0\nSECTION\n 2\nENTITIES\n" in _h or\
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85 " 0\nSECTION\n 2\nOBJECTS\n" in _h or\
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86 " 0\nSECTION\n 2\nTHUMBNAILIMAGE\n" in _h) and \
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87 _l[-19:] == " 0\nENDSEC\n 0\nEOF\n":
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88 return 'dxf'
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89 imghdr.tests.append(test_dxf)
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90
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91
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92 def mapping(string, tuple_strings):
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93 """mapping(string, tuple)
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94
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95 string: a message string
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96 tuple_strings: a truple with string items
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97 Return the string replacing the $[n] words whith its corresponding value
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98 from the tuple.
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99 It is used because the gettext module can not #-#supotr#-# strings as:
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100 "Invalid type (%s) in record: %s" %(type, record)
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101 """
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102 for _index in range(len(tuple_strings)):
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103 string = string.replace("$" + str(_index+1), tuple_strings[_index])
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104 #string = string.replace("$" + str(_index+1), str(tuple[_index]))
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105 return string
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106
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107 def eliminate_duplicates(list):
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108 """eliminate_duplicates(list)
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109
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110 Return a copy of the list without duplicate values
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111 """
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112 _result = [ ]
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113 for item in list:
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114 if item not in _result:
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115 _result.append(item)
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116 return _result
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117
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118 def is_valid_code(code):
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119 """is_valid_code(code)
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120
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121 code: a string code
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122 Funtion to test if a record code is valid
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123 A valid code must fulfill:
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124 - Be a not empty string
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parents:
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125 - The valid characters are the defined in MSdos 6.0 including .$#%&_
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parents:
diff changeset
126 What it means? I am not sure, so I test if all the character
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parents:
diff changeset
127 are in cp850
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parents:
diff changeset
128 - Cannot contain the following characters
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parents:
diff changeset
129 <~> separator of records if FIEBDC-3
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parents:
diff changeset
130 <|> separator of fields if FIEBDC-3
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parents:
diff changeset
131 <\> separator of subfield in FIEBDC-3
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parents:
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132 <\t> tab -> control character
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parents:
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133 < > space -> control character
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Miguel Ángel Bárcena Rodríguez <miguelangel@obraencurso.es>
parents:
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134 <\n> end of line -> control character
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Miguel Ángel Bárcena Rodríguez <miguelangel@obraencurso.es>
parents:
diff changeset
135 <\r> end of line -> control character
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Miguel Ángel Bárcena Rodríguez <miguelangel@obraencurso.es>
parents:
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136 - Cannot end with <#> or <##>, root and chapter code record
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parents:
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137 It return a tuple (is_valid, code)
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parents:
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138 is_valid (True/False)
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139 True: the code is valid
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parents:
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140 False: the code is not valid
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141 code(False/code)
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142 False: the code is not valid and can not be corrected
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143 code: the code or the corrected code
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144 """
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145 _is_valid = True
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parents:
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146 if not isinstance(code, str):
23
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parents: 17
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147 print("Not a string, code: " + code + type(code) )
1
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148 return False, False
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149 if code == "":
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150 return False, False
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parents:
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151 try:
17
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parents: 1
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152 _unicode_code = unicode(code, "utf8",'replace')
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parents: 1
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153 _code_utf8 = _unicode_code.encode("utf8",'replace')
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parents: 1
diff changeset
154 _code_cp850 = _unicode_code.encode("cp850",'replace')
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parents: 1
diff changeset
155 _unicode_code = unicode(_code_cp850, "cp850",'replace')
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parents: 1
diff changeset
156
1
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157 except UnicodeError:
23
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parents: 17
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158 print ("Unicode Error, code: " + code )
1
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159 return False, False
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160 if _code_utf8 != code:
23
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parents: 17
diff changeset
161 print ("Not in cp950, code: " + code )
1
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parents:
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162 _is_valid = False
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parents:
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163 if _code_utf8 == "":
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parents:
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164 return False, False
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parents:
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165 code = _code_utf8
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parents:
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166 _code2 = re.sub("[\t \n\r~|\\\]","",code)
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parents:
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167 if _code2 != code:
23
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parents: 17
diff changeset
168 print("Control characters in code: " + code )
1
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parents:
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169 if _code2 == "":
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parents:
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170 return False, False
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171 _is_valid = False
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parents:
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172 code = _code2
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parents:
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173 if code[-1] == "#":
23
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parents: 17
diff changeset
174 print("# in code: " + code )
1
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parents:
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175 _is_valid = False
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176 while code[-1] == "#":
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177 code = code[:-1]
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178 if code == "":
23
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parents: 17
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179 print("Empty code")
1
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180 return False, False
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181 return _is_valid, code
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182
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183 def getFiletype(filename, h=None):
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184 """getFiletype(filename, h=None):
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parents:
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185
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186 filename: the filename to test
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187 h: raw string, if h is not None the filename is ignored and h is assumed
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188 to contain the byte stream to test
23
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parents: 17
diff changeset
189
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diff changeset
190 valid types:
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parents: 17
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191 "image", "wmf", "dxf", "pdf" , "video",
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parents: 17
diff changeset
192 "office-document", "office-presentation", "office-spreadsheet",
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parents: 17
diff changeset
193 "html", "rtf", "txt"
1
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194 """
23
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parents: 17
diff changeset
195 _ext = os.path.splitext(filename)[1][1:].lower()
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parents: 17
diff changeset
196
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diff changeset
197 _video_types = ["avi", "mp4", "m4p", "m4v2", "m4v","amv", "mpg", "m2v",
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parents: 17
diff changeset
198 "mp2", "mpe", "mpv", "mpeg", "ogg", "ogv", "webm", "mkv",
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parents: 17
diff changeset
199 "ogm", "flv", "f4v", "f4p", "f4a", "f4b", "vob", "drc",
65e7ae0d0e63 GTK2 to GTK3
Miguel Ángel Bárcena Rodríguez <miguelangel@obraencurso.es>
parents: 17
diff changeset
200 "mts", "m2ts", "mov", "qt", "wmv", "yuv", "rm", "rmvb",
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Miguel Ángel Bárcena Rodríguez <miguelangel@obraencurso.es>
parents: 17
diff changeset
201 "asf", "svi", "3gp", "3g2", "mxf", "roq", "nsv"]
65e7ae0d0e63 GTK2 to GTK3
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parents: 17
diff changeset
202 _document_types = ["doc", "docx", "odt"]
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parents: 17
diff changeset
203 _spreadsheet_types = ["xls", "xlsx", "ods"]
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parents: 17
diff changeset
204 _presentation_types = ["pps", "ppsx", "ppt", "pptx", "odp"]
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parents: 17
diff changeset
205 _html_types = ["html", "xhtml"]
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parents: 17
diff changeset
206 if _ext in _video_types:
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parents: 17
diff changeset
207 return "video"
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parents: 17
diff changeset
208 elif _ext in _document_types:
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parents: 17
diff changeset
209 return "office-document"
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parents: 17
diff changeset
210 elif _ext in _spreadsheet_types:
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parents: 17
diff changeset
211 return "office-spreadsheet"
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parents: 17
diff changeset
212 elif _ext in _presentation_types:
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parents: 17
diff changeset
213 return "office-presentation"
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Miguel Ángel Bárcena Rodríguez <miguelangel@obraencurso.es>
parents: 17
diff changeset
214 elif _ext in _html_types:
65e7ae0d0e63 GTK2 to GTK3
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parents: 17
diff changeset
215 return "html"
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parents: 17
diff changeset
216 elif _ext == "rtf":
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parents: 17
diff changeset
217 return "rtf"
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parents: 17
diff changeset
218 elif _ext == "txt":
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parents: 17
diff changeset
219 return "txt"
1
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parents:
diff changeset
220 _type = imghdr.what(filename, h)
23
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parents: 17
diff changeset
221 _image_types = ["rgb", "gif", "pbm", "pgm", "ppm" ,"tiff", "tif", "rast",
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parents: 17
diff changeset
222 "xbm", "jpeg", "jpg", "bmp", "png", "webp", "exr",
65e7ae0d0e63 GTK2 to GTK3
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parents: 17
diff changeset
223 "ico", "svg"]
65e7ae0d0e63 GTK2 to GTK3
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parents: 17
diff changeset
224 if _type in _image_types and _ext in _image_types:
1
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parents:
diff changeset
225 return "image"
23
65e7ae0d0e63 GTK2 to GTK3
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parents: 17
diff changeset
226 elif _type == "wmf" and _ext == "wmf":
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parents: 17
diff changeset
227 return "wmf"
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parents: 17
diff changeset
228 elif _type == "dxf" and _ext == "dxf":
1
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parents:
diff changeset
229 return "dxf"
23
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parents: 17
diff changeset
230
65e7ae0d0e63 GTK2 to GTK3
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parents: 17
diff changeset
231 elif _type == "pdf" and _ext == "pdf":
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parents: 17
diff changeset
232 return "pdf"
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parents: 17
diff changeset
233 return None