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annotate abcfirstline.py @ 689:4ac5d00c1328

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Next from Nerys - La Roulante.
author Jim Hague <jim.hague@acm.org>
date Sat, 16 Sep 2017 23:09:15 +0100
parents 1b79867b4f35
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python3
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2 #
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3 # Write out a modified version of a .abc file with just the data
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4 # to print the first line of the music only.
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5 #
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6
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7 import sys
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8
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9 def process(inf):
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10 continued = False
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11 print("X:1")
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12 for line in inf:
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13 line = line.strip()
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14 # If it is empty or starts "%", ignore it.
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15 if len(line) == 0 or line[0] == "%":
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16 continue
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17
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18 # Is it a header line? I.e. does it start LETTER (or +) COLON?
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19 # If so, output only ones we need.
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20 start = line[:2]
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21 if len(start) > 1 and start[1] == ":" and (start[0].isalpha() or start[0] == '+'):
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22 if start[0] in ["M", "K", "L"]:
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23 print(line)
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24 # Output line. If it is a continuation, output at most one
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25 # continuation.
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26 else:
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27 print(line)
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28 if continued or line[-1] != "\\":
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29 break
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30 else:
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31 continued = True
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32
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33 if len(sys.argv) > 1:
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34 for arg in sys.argv[1:]:
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35 try:
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36 inf = open(arg, "r")
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37 process(inf)
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38 finally:
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39 inf.close()
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40 else:
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41 process(sys.stdin)