Mercurial > dottes
annotate abcfield.py @ 591:2face6618bf3
Convert Markdown in N and H fields. Fix up .abc links.
author | Jim Hague <jim.hague@acm.org> |
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date | Wed, 02 Nov 2016 08:36:21 +0000 (2016-11-02) |
parents | afc031477784 |
children | 9986c67edf91 |
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1 #!/usr/bin/env python3 |
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2 # |
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3 # Extact a text field (title, by default) from a .abc file, and print it out |
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4 # with any ABC accented characters converted to HTML (default) or Latex. |
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5 # |
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6 # Optionally rearrange a field into display format: |
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7 # * In Title fields, change 'sort' form such as 'Exploding Potato, The' |
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8 # to display format 'The Exploding Potato'. |
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9 # * In Key fields, translate the ABC key representation to full text, |
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10 # e.g. G#dor becomes G# Dorian. |
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11 # |
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12 # Recognise continuation header fields and print those too. The ABC standard |
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13 # defines continuation fields as starting ':+'. Regrettably none of the tools |
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14 # I am using the Booke recognise that syntax, so I am adopting a Booke |
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15 # convention of '<header>:+' *also* being a continuation. Note that a |
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16 # continuation is a distinct line in the field value; the value has a line |
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17 # break between it and the previous line. |
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18 # |
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19 |
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20 import optparse |
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21 import re |
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22 import subprocess |
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23 import sys |
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24 |
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25 accentedletters = { |
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26 # Acute accents |
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27 "'A" : ("Á", "\\'{A}"), |
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28 "'E" : ("É", "\\'{E}"), |
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29 "'I" : ("Í", "\\'{I}"), |
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30 "'O" : ("Ó", "\\'{O}"), |
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31 "'U" : ("Ú", "\\'{U}"), |
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32 "'Y" : ("Ý", "\\'{Y}"), |
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33 "'a" : ("á", "\\'{a}"), |
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34 "'e" : ("é", "\\'{e}"), |
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35 "'i" : ("í", "\\'{i}"), |
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36 "'o" : ("ó", "\\'{o}"), |
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37 "'u" : ("ú", "\\'{u}"), |
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38 "'y" : ("ý", "\\'{y}"), |
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39 |
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40 # Grave accents |
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41 "`A" : ("À", "\\`{A}"), |
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42 "`E" : ("È", "\\`{E}"), |
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43 "`I" : ("Ì", "\\`{I}"), |
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44 "`O" : ("Ò", "\\`{O}"), |
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45 "`U" : ("Ù", "\\`{U}"), |
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46 "`a" : ("à", "\\`{a}"), |
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47 "`e" : ("è", "\\`{e}"), |
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48 "`i" : ("ì", "\\`{i}"), |
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49 "`o" : ("ò", "\\`{o}"), |
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50 "`u" : ("ù", "\\`{u}"), |
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51 |
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52 # Umlauts |
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53 "\"A" : ("Ä", "\\\"{A}"), |
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54 "\"E" : ("Ë", "\\\"{E}"), |
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55 "\"I" : ("Ï", "\\\"{I}"), |
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56 "\"O" : ("Ö", "\\\"{O}"), |
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57 "\"U" : ("Ü", "\\\"{U}"), |
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58 "\"Y" : ("Ÿ", "\\\"{Y}"), |
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59 "\"a" : ("ä", "\\\"{a}"), |
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60 "\"e" : ("ë", "\\\"{e}"), |
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61 "\"i" : ("ï", "\\\"{\i}"), |
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62 "\"o" : ("ö", "\\\"{o}"), |
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63 "\"u" : ("ü", "\\\"{u}"), |
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64 "\"y" : ("ÿ", "\\\"{y}"), |
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65 |
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66 # Circumflexes |
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67 "^A" : ("Â", "\\^{A}"), |
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68 "^E" : ("Ê", "\\^{E}"), |
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69 "^I" : ("Î", "\\^{I}"), |
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70 "^O" : ("Ô", "\\^{O}"), |
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71 "^U" : ("Û", "\\^{U}"), |
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72 "^a" : ("â", "\\^{a}"), |
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73 "^e" : ("ê", "\\^{e}"), |
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74 "^i" : ("î", "\\^{\i}"), |
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75 "^o" : ("ô", "\\^{o}"), |
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76 "^u" : ("û", "\\^{u}"), |
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77 |
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78 # Tilde |
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79 "~A" : ("Ã", "\\~{A}"), |
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80 "~N" : ("Ñ", "\\~{N}"), |
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81 "~O" : ("Õ", "\\~{O}"), |
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82 "~a" : ("ã", "\\~{a}"), |
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83 "~n" : ("ñ", "\\~{n}"), |
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84 "~o" : ("õ", "\\~{o}"), |
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85 |
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86 # Cedilla |
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87 ",C" : ("Ç", "\\c{C}"), |
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88 ",c" : ("ç", "\\c{c}"), |
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89 |
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90 # Slash |
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91 "/O" : ("Ø", "\\O"), |
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92 "/o" : ("ø", "\\o"), |
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93 |
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94 # Ring |
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95 "AA" : ("Å", "\\r{A}"), |
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96 "aa" : ("å", "\\r{a}"), |
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97 |
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98 # Ligatures |
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99 "AE" : ("Æ", "\\AE"), |
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100 "ae" : ("æ", "\\ae"), |
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101 "ss" : ("ß", "\\ss"), |
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102 } |
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103 |
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104 abckeys = { |
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105 "m": "Minor", |
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106 "min": "Minor", |
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107 "mix": "Mixolydian", |
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108 "dor": "Dorian", |
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109 "phr": "Phrygian", |
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110 "lyd": "Lydian", |
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111 "loc": "Locrian", |
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112 } |
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113 |
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114 # Convert ABC accented chars to HTML entities or LaTex. |
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115 def convertAccents(t, latex=False): |
110
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116 res = "" |
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117 while True: |
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118 p = t.partition('\\') |
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119 res += p[0] |
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120 if p[1] == "": |
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121 break |
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122 abc = p[2][0:2] |
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123 t = p[2][2:] |
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124 if abc in accentedletters: |
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125 if latex: |
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126 res += accentedletters[abc][1] |
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127 else: |
110
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128 res += accentedletters[abc][0] |
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129 else: |
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130 res += "\\" + abc |
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131 return res |
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132 |
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133 # Convert Title fields from sort to display, so Bat, The->The Bat. |
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134 def convertTitleToDisplay(t): |
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135 p = t.rpartition(',') |
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136 if p[1] == "": |
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137 return t |
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138 else: |
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139 return p[2].strip() + " " + p[0].strip() |
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140 |
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141 # Convert Key field from ABC to display, so G#dor->G# Dorian. |
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142 def convertKeyToDisplay(t): |
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143 letter = t[0].upper() |
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144 accidental = "" |
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145 mode = "" |
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146 try: |
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147 accidental = t[1] |
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148 if accidental == '#' or accidental == 'b': |
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149 mode = t[2:] |
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150 else: |
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151 accidental = "" |
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152 mode = t[1:] |
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153 except IndexError: |
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154 pass |
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155 mode = mode.strip().lower() |
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156 return letter + accidental + ' ' + abckeys.get(mode, "Major") |
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157 |
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158 # Convert input string from Markdown to HTML or LaTeX. Fix up link |
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159 # targets so any 'foo.abc' target links to the tune with that name. |
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160 def convertMarkdown(t, latex): |
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161 if latex: |
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162 target = "--to=latex" |
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163 else: |
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164 target = "--to=html" |
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165 res = subprocess.check_output(['pandoc', '--from=markdown', target], input=t, universal_newlines=True) |
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166 if latex: |
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167 res = re.sub(r'\\href{(.*).abc}', r'\\hyperlink{\1}', res) |
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168 else: |
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169 res = re.sub(r'href="(.*).abc"', r'href="\1.html"', res) |
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170 return res |
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171 |
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172 # Return the raw text for a given field. Optionally the nth field is taken, |
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173 # or the field data must start with a designated string to be recognised. |
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174 def getFieldText(inf, field, n = 1, starts = None): |
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175 res = "" |
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176 for line in inf: |
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177 line = line.strip() |
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178 if len(line) > 2 and line[1] == ':': |
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179 if line[0] == "+" or (line[0] == field and line[2] == "+"): |
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180 if not res: |
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181 continue |
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182 if line[0] == "+": |
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183 line = line[2:] |
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184 else: |
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185 line = line[3:] |
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186 res = res + '\n' + line.strip() |
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187 else: |
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188 if res: |
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189 break |
586
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190 if line[0] == field: |
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191 line = line[2:].strip() |
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192 if starts: |
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193 if line.find(starts) != 0: |
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194 continue |
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195 line = line[len(starts):].strip() |
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196 if n > 1: |
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197 n = n - 1 |
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198 continue |
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199 res = line |
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200 return res |
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201 |
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202 # Return display text for a given field. |
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203 def getFieldDisplayText(inf, field, n = 1, starts = None, latex = False): |
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204 res = getFieldText(inf, field, n, starts) |
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205 if res: |
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206 res = convertAccents(res, latex) |
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207 if field.upper() == "T": |
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208 res = convertTitleToDisplay(res) |
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209 elif field.upper() == "K": |
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210 res = convertKeyToDisplay(res) |
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211 elif field.upper() in ["H", "N"]: |
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212 res = convertMarkdown(res, latex) |
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213 return res |
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214 |
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215 if __name__ == "__main__": |
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216 def process(inf, options): |
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217 if options.display: |
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218 line = getFieldDisplayText(inf, options.field, options.index, options.starts, options.latex) |
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219 else: |
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220 line = getFieldText(inf, options.field, options.index, options.starts) |
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221 if line: |
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222 print(line) |
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223 return True |
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224 else: |
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225 return False |
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226 |
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227 # execute only if run as a script |
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228 parser = optparse.OptionParser(usage="usage: %prog [options] [filename]\n\n" |
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229 " Extract field data from ABC file.") |
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230 parser.add_option("-f", "--field", dest="field", default="T", |
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231 help="extract the field FIELD", metavar="FIELD") |
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232 parser.add_option("-l", "--latex", dest="latex", |
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233 action="store_true", default=False, |
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234 help="convert special characters for LaTeX") |
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235 parser.add_option("-d", "--display", dest="display", |
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236 action="store_true", default=False, |
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237 help="convert to display text") |
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238 parser.add_option("-n", "--index", dest="index", |
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239 action="store", type="int", default=1, |
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240 help="report INDEXth value [default: %default]", |
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241 metavar="INDEX") |
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242 parser.add_option("-s", "--starts", dest="starts", |
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243 action="store", type="string", default=None, |
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244 help="report only if line starts CONTENT and remove CONTENT", |
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245 metavar="CONTENT") |
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246 (options, args) = parser.parse_args() |
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247 |
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248 res = False |
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249 if len(args) > 0: |
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250 for arg in args: |
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251 try: |
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252 inf = open(arg, "r") |
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253 res = res or process(inf, options) |
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254 finally: |
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255 inf.close() |
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256 else: |
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257 res = process(sys.stdin, options) |
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258 sys.exit(int(not res)) |