Mercurial > cpython-lru_cache-weakref

annotate Demo/scripts/morse.py @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents 3130b7e812b0
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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6194fd754323 Update morse script, avoid globals, use iterators.
Georg Brandl <georg@python.org>
parents: 32735
diff changeset
1 #! /usr/bin/env python
6194fd754323 Update morse script, avoid globals, use iterators.
Georg Brandl <georg@python.org>
parents: 32735
diff changeset
2
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a8b7ee0e572d Get rid of freeze (now its own directory).
Guido van Rossum <guido@python.org>
parents:
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3 # DAH should be three DOTs.
a8b7ee0e572d Get rid of freeze (now its own directory).
Guido van Rossum <guido@python.org>
parents:
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4 # Space between DOTs and DAHs should be one DOT.
a8b7ee0e572d Get rid of freeze (now its own directory).
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parents:
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5 # Space between two letters should be one DAH.
a8b7ee0e572d Get rid of freeze (now its own directory).
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parents:
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6 # Space between two words should be DOT DAH DAH.
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7
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8 import sys, math, audiodev
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9
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10 DOT = 30
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parents:
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11 DAH = 3 * DOT
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parents: 1928
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12 OCTAVE = 2 # 1 == 441 Hz, 2 == 882 Hz, ...
1928
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13
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14 morsetab = {
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Tim Peters <tim.peters@gmail.com>
parents: 1928
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15 'A': '.-', 'a': '.-',
2bc66f1df7cc Whitespace normalization. Ran reindent.py over the entire source tree.
Tim Peters <tim.peters@gmail.com>
parents: 1928
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16 'B': '-...', 'b': '-...',
2bc66f1df7cc Whitespace normalization. Ran reindent.py over the entire source tree.
Tim Peters <tim.peters@gmail.com>
parents: 1928
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17 'C': '-.-.', 'c': '-.-.',
2bc66f1df7cc Whitespace normalization. Ran reindent.py over the entire source tree.
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parents: 1928
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18 'D': '-..', 'd': '-..',
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Tim Peters <tim.peters@gmail.com>
parents: 1928
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19 'E': '.', 'e': '.',
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Tim Peters <tim.peters@gmail.com>
parents: 1928
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20 'F': '..-.', 'f': '..-.',
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parents: 1928
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21 'G': '--.', 'g': '--.',
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parents: 1928
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22 'H': '....', 'h': '....',
2bc66f1df7cc Whitespace normalization. Ran reindent.py over the entire source tree.
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parents: 1928
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23 'I': '..', 'i': '..',
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parents: 1928
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24 'J': '.---', 'j': '.---',
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parents: 1928
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25 'K': '-.-', 'k': '-.-',
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parents: 1928
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26 'L': '.-..', 'l': '.-..',
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parents: 1928
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27 'M': '--', 'm': '--',
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Tim Peters <tim.peters@gmail.com>
parents: 1928
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28 'N': '-.', 'n': '-.',
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parents: 1928
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29 'O': '---', 'o': '---',
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parents: 1928
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30 'P': '.--.', 'p': '.--.',
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parents: 1928
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31 'Q': '--.-', 'q': '--.-',
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parents: 1928
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32 'R': '.-.', 'r': '.-.',
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parents: 1928
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33 'S': '...', 's': '...',
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parents: 1928
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34 'T': '-', 't': '-',
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parents: 1928
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35 'U': '..-', 'u': '..-',
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parents: 1928
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36 'V': '...-', 'v': '...-',
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parents: 1928
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37 'W': '.--', 'w': '.--',
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parents: 1928
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38 'X': '-..-', 'x': '-..-',
2bc66f1df7cc Whitespace normalization. Ran reindent.py over the entire source tree.
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parents: 1928
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39 'Y': '-.--', 'y': '-.--',
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parents: 1928
diff changeset
40 'Z': '--..', 'z': '--..',
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parents: 32735
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41 '0': '-----', ',': '--..--',
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parents: 32735
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42 '1': '.----', '.': '.-.-.-',
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parents: 32735
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43 '2': '..---', '?': '..--..',
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parents: 32735
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44 '3': '...--', ';': '-.-.-.',
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parents: 32735
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45 '4': '....-', ':': '---...',
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parents: 32735
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46 '5': '.....', "'": '.----.',
6194fd754323 Update morse script, avoid globals, use iterators.
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parents: 32735
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47 '6': '-....', '-': '-....-',
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parents: 32735
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48 '7': '--...', '/': '-..-.',
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parents: 32735
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49 '8': '---..', '(': '-.--.-',
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parents: 32735
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50 '9': '----.', ')': '-.--.-',
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51 ' ': ' ', '_': '..--.-',
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52 }
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53
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parents: 32735
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54 nowave = '\0' * 200
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55
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56 # If we play at 44.1 kHz (which we do), then if we produce one sine
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parents:
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57 # wave in 100 samples, we get a tone of 441 Hz. If we produce two
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58 # sine waves in these 100 samples, we get a tone of 882 Hz. 882 Hz
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59 # appears to be a nice one for playing morse code.
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60 def mkwave(octave):
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parents: 1928
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61 sinewave = ''
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parents: 1928
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62 for i in range(100):
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63 val = int(math.sin(math.pi * i * octave / 50.0) * 30000)
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64 sinewave += chr((val >> 8) & 255) + chr(val & 255)
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65 return sinewave
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66
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67 defaultwave = mkwave(OCTAVE)
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68
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69 def main():
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70 import getopt
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71 try:
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parents: 1928
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72 opts, args = getopt.getopt(sys.argv[1:], 'o:p:')
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73 except getopt.error:
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parents: 1928
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74 sys.stderr.write('Usage ' + sys.argv[0] +
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75 ' [ -o outfile ] [ -p octave ] [ words ] ...\n')
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parents: 1928
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76 sys.exit(1)
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77 dev = None
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78 wave = defaultwave
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79 for o, a in opts:
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80 if o == '-o':
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81 import aifc
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parents: 1928
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82 dev = aifc.open(a, 'w')
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parents: 1928
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83 dev.setframerate(44100)
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parents: 1928
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84 dev.setsampwidth(2)
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parents: 1928
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85 dev.setnchannels(1)
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parents: 1928
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86 if o == '-p':
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87 wave = mkwave(int(a))
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88 if not dev:
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parents: 1928
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89 import audiodev
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parents: 1928
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90 dev = audiodev.AudioDev()
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parents: 1928
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91 dev.setoutrate(44100)
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92 dev.setsampwidth(2)
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parents: 1928
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93 dev.setnchannels(1)
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94 dev.close = dev.stop
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parents: 1928
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95 dev.writeframesraw = dev.writeframes
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96 if args:
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97 source = [' '.join(args)]
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98 else:
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99 source = iter(sys.stdin.readline, '')
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100 for line in source:
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parents: 1928
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101 mline = morse(line)
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102 play(mline, dev, wave)
32735
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parents: 1928
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103 if hasattr(dev, 'wait'):
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parents: 1928
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104 dev.wait()
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parents: 1928
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105 dev.close()
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106
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107 # Convert a string to morse code with \001 between the characters in
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108 # the string.
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109 def morse(line):
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Tim Peters <tim.peters@gmail.com>
parents: 1928
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110 res = ''
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parents: 1928
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111 for c in line:
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Tim Peters <tim.peters@gmail.com>
parents: 1928
diff changeset
112 try:
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113 res += morsetab[c] + '\001'
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114 except KeyError:
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parents: 1928
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115 pass
2bc66f1df7cc Whitespace normalization. Ran reindent.py over the entire source tree.
Tim Peters <tim.peters@gmail.com>
parents: 1928
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116 return res
1928
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117
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118 # Play a line of morse code.
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119 def play(line, dev, wave):
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120 for c in line:
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parents: 1928
diff changeset
121 if c == '.':
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122 sine(dev, DOT, wave)
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parents: 1928
diff changeset
123 elif c == '-':
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124 sine(dev, DAH, wave)
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125 else: # space
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Tim Peters <tim.peters@gmail.com>
parents: 1928
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126 pause(dev, DAH + DOT)
2bc66f1df7cc Whitespace normalization. Ran reindent.py over the entire source tree.
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parents: 1928
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127 pause(dev, DOT)
1928
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128
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129 def sine(dev, length, wave):
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parents: 1928
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130 for i in range(length):
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131 dev.writeframesraw(wave)
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132
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133 def pause(dev, length):
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2bc66f1df7cc Whitespace normalization. Ran reindent.py over the entire source tree.
Tim Peters <tim.peters@gmail.com>
parents: 1928
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134 for i in range(length):
2bc66f1df7cc Whitespace normalization. Ran reindent.py over the entire source tree.
Tim Peters <tim.peters@gmail.com>
parents: 1928
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135 dev.writeframesraw(nowave)
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a8b7ee0e572d Get rid of freeze (now its own directory).
Guido van Rossum <guido@python.org>
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136
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6194fd754323 Update morse script, avoid globals, use iterators.
Georg Brandl <georg@python.org>
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137 if __name__ == '__main__':
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2bc66f1df7cc Whitespace normalization. Ran reindent.py over the entire source tree.
Tim Peters <tim.peters@gmail.com>
parents: 1928
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138 main()