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1 | """Various display related classes. |
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1 | """Various display related classes. | |
2 |
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2 | |||
3 | Authors : MinRK, gregcaporaso, dannystaple |
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3 | Authors : MinRK, gregcaporaso, dannystaple | |
4 | """ |
|
4 | """ | |
5 | from os.path import exists, isfile, splitext, abspath, join, isdir |
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5 | from os.path import exists, isfile, splitext, abspath, join, isdir | |
6 | from os import walk, sep |
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6 | from os import walk, sep | |
7 |
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7 | |||
8 | from IPython.core.display import DisplayObject |
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8 | from IPython.core.display import DisplayObject | |
9 |
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9 | |||
10 |
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10 | |||
11 | class Audio(DisplayObject): |
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11 | class Audio(DisplayObject): | |
12 | """Create an audio object. |
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12 | """Create an audio object. | |
13 |
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13 | |||
14 | When this object is returned by an input cell or passed to the |
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14 | When this object is returned by an input cell or passed to the | |
15 | display function, it will result in Audio controls being displayed |
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15 | display function, it will result in Audio controls being displayed | |
16 | in the frontend (only works in the notebook). |
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16 | in the frontend (only works in the notebook). | |
17 |
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17 | |||
18 | Parameters |
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18 | Parameters | |
19 | ---------- |
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19 | ---------- | |
20 | data : numpy array, list, unicode, str or bytes |
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20 | data : numpy array, list, unicode, str or bytes | |
21 | Can be a |
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21 | Can be a | |
22 | * Numpy 1d array containing the desired waveform (mono) |
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22 | * Numpy 1d array containing the desired waveform (mono) | |
23 | * List of float or integer representing the waveform (mono) |
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23 | * List of float or integer representing the waveform (mono) | |
24 | * String containing the filename |
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24 | * String containing the filename | |
25 | * Bytestring containing raw PCM data or |
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25 | * Bytestring containing raw PCM data or | |
26 |
* URL pointing to a file on the web. |
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26 | * URL pointing to a file on the web. | |
27 |
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27 | |||
28 | If the array option is used the waveform will be normalized. |
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28 | If the array option is used the waveform will be normalized. | |
29 |
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29 | |||
30 |
If a filename or url is used the format support will be browser |
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30 | If a filename or url is used the format support will be browser | |
31 |
dependent. |
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31 | dependent. | |
32 | url : unicode |
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32 | url : unicode | |
33 | A URL to download the data from. |
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33 | A URL to download the data from. | |
34 | filename : unicode |
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34 | filename : unicode | |
35 | Path to a local file to load the data from. |
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35 | Path to a local file to load the data from. | |
36 | embed : boolean |
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36 | embed : boolean | |
37 | Should the image data be embedded using a data URI (True) or should |
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37 | Should the image data be embedded using a data URI (True) or should | |
38 |
the original source be referenced. Set this to True if you want the |
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38 | the original source be referenced. Set this to True if you want the | |
39 | audio to playable later with no internet connection in the notebook. |
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39 | audio to playable later with no internet connection in the notebook. | |
40 |
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40 | |||
41 | Default is `True`, unless the keyword argument `url` is set, then |
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41 | Default is `True`, unless the keyword argument `url` is set, then | |
42 | default value is `False`. |
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42 | default value is `False`. | |
43 | rate : integer |
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43 | rate : integer | |
44 | The sampling rate of the raw data. |
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44 | The sampling rate of the raw data. | |
45 | Only required when data parameter is being used as an array |
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45 | Only required when data parameter is being used as an array | |
46 | autoplay : bool |
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46 | autoplay : bool | |
47 | Set to True if the audio should immediately start playing. |
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47 | Set to True if the audio should immediately start playing. | |
48 | Default is `False`. |
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48 | Default is `False`. | |
49 |
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49 | |||
50 | Examples |
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50 | Examples | |
51 | -------- |
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51 | -------- | |
52 | :: |
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52 | :: | |
53 |
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53 | |||
54 | # Generate a sound |
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54 | # Generate a sound | |
55 | import numpy as np |
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55 | import numpy as np | |
56 | framerate = 44100 |
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56 | framerate = 44100 | |
57 | t = np.linspace(0,5,framerate*5) |
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57 | t = np.linspace(0,5,framerate*5) | |
58 | data = np.sin(2*np.pi*220*t) + np.sin(2*np.pi*224*t)) |
|
58 | data = np.sin(2*np.pi*220*t) + np.sin(2*np.pi*224*t)) | |
59 | Audio(data,rate=framerate) |
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59 | Audio(data,rate=framerate) | |
60 |
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60 | |||
61 | Audio("http://www.nch.com.au/acm/8k16bitpcm.wav") # From URL |
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61 | Audio("http://www.nch.com.au/acm/8k16bitpcm.wav") # From URL | |
62 | Audio(url="http://www.w3schools.com/html/horse.ogg") |
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62 | Audio(url="http://www.w3schools.com/html/horse.ogg") | |
63 |
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63 | |||
64 | Audio('/path/to/sound.wav') # From file |
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64 | Audio('/path/to/sound.wav') # From file | |
65 | Audio(filename='/path/to/sound.ogg') |
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65 | Audio(filename='/path/to/sound.ogg') | |
66 |
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66 | |||
67 | Audio(b'RAW_WAV_DATA..) # From bytes |
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67 | Audio(b'RAW_WAV_DATA..) # From bytes | |
68 | Audio(data=b'RAW_WAV_DATA..) |
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68 | Audio(data=b'RAW_WAV_DATA..) | |
69 |
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69 | |||
70 | """ |
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70 | """ | |
71 | _read_flags = 'rb' |
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71 | _read_flags = 'rb' | |
72 |
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72 | |||
73 | def __init__(self, data=None, filename=None, url=None, embed=None, rate=None, autoplay=False): |
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73 | def __init__(self, data=None, filename=None, url=None, embed=None, rate=None, autoplay=False): | |
74 | if filename is None and url is None and data is None: |
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74 | if filename is None and url is None and data is None: | |
75 | raise ValueError("No image data found. Expecting filename, url, or data.") |
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75 | raise ValueError("No image data found. Expecting filename, url, or data.") | |
76 | if embed is False and url is None: |
|
76 | if embed is False and url is None: | |
77 | raise ValueError("No url found. Expecting url when embed=False") |
|
77 | raise ValueError("No url found. Expecting url when embed=False") | |
78 |
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78 | |||
79 | if url is not None and embed is not True: |
|
79 | if url is not None and embed is not True: | |
80 | self.embed = False |
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80 | self.embed = False | |
81 | else: |
|
81 | else: | |
82 | self.embed = True |
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82 | self.embed = True | |
83 | self.autoplay = autoplay |
|
83 | self.autoplay = autoplay | |
84 | super(Audio, self).__init__(data=data, url=url, filename=filename) |
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84 | super(Audio, self).__init__(data=data, url=url, filename=filename) | |
85 |
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85 | |||
86 | if self.data is not None and not isinstance(self.data, bytes): |
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86 | if self.data is not None and not isinstance(self.data, bytes): | |
87 | self.data = self._make_wav(data,rate) |
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87 | self.data = self._make_wav(data,rate) | |
88 |
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88 | |||
89 | def reload(self): |
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89 | def reload(self): | |
90 | """Reload the raw data from file or URL.""" |
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90 | """Reload the raw data from file or URL.""" | |
91 | import mimetypes |
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91 | import mimetypes | |
92 | if self.embed: |
|
92 | if self.embed: | |
93 | super(Audio, self).reload() |
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93 | super(Audio, self).reload() | |
94 |
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94 | |||
95 | if self.filename is not None: |
|
95 | if self.filename is not None: | |
96 | self.mimetype = mimetypes.guess_type(self.filename)[0] |
|
96 | self.mimetype = mimetypes.guess_type(self.filename)[0] | |
97 | elif self.url is not None: |
|
97 | elif self.url is not None: | |
98 | self.mimetype = mimetypes.guess_type(self.url)[0] |
|
98 | self.mimetype = mimetypes.guess_type(self.url)[0] | |
99 | else: |
|
99 | else: | |
100 | self.mimetype = "audio/wav" |
|
100 | self.mimetype = "audio/wav" | |
101 |
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101 | |||
102 | def _make_wav(self, data, rate): |
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102 | def _make_wav(self, data, rate): | |
103 | """ Transform a numpy array to a PCM bytestring """ |
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103 | """ Transform a numpy array to a PCM bytestring """ | |
104 | import struct |
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104 | import struct | |
105 | from io import BytesIO |
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105 | from io import BytesIO | |
106 | import wave |
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106 | import wave | |
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107 | ||||
107 | try: |
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108 | try: | |
108 | import numpy as np |
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109 | import numpy as np | |
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110 | ||||
109 | data = np.array(data,dtype=float) |
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111 | data = np.array(data, dtype=float) | |
110 |
if len(data.shape) |
|
112 | if len(data.shape) == 1: | |
111 | raise ValueError("encoding of stereo PCM signals are unsupported") |
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113 | nchan = 1 | |
|
114 | elif len(data.shape) == 2: | |||
|
115 | # In wave files,channels are interleaved. E.g., | |||
|
116 | # "L1R1L2R2..." for stereo. See | |||
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117 | # http://msdn.microsoft.com/en-us/library/windows/hardware/dn653308(v=vs.85).aspx | |||
|
118 | # for channel ordering | |||
|
119 | nchan = data.shape[0] | |||
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120 | data = data.T.ravel() | |||
|
121 | else: | |||
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122 | raise ValueError('Array audio input must be a 1D or 2D array') | |||
112 | scaled = np.int16(data/np.max(np.abs(data))*32767).tolist() |
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123 | scaled = np.int16(data/np.max(np.abs(data))*32767).tolist() | |
113 | except ImportError: |
|
124 | except ImportError: | |
|
125 | # check that it is a "1D" list | |||
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126 | idata = iter(data) # fails if not an iterable | |||
|
127 | try: | |||
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128 | iter(idata.next()) | |||
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129 | raise TypeError('Only lists of mono audio are ' | |||
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130 | 'supported if numpy is not installed') | |||
|
131 | except TypeError: | |||
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132 | # this means it's not a nested list, which is what we want | |||
|
133 | pass | |||
114 | maxabsvalue = float(max([abs(x) for x in data])) |
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134 | maxabsvalue = float(max([abs(x) for x in data])) | |
115 |
scaled = [int(x/maxabsvalue*32767) for x in data] |
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135 | scaled = [int(x/maxabsvalue*32767) for x in data] | |
|
136 | nchan = 1 | |||
|
137 | ||||
116 | fp = BytesIO() |
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138 | fp = BytesIO() | |
117 | waveobj = wave.open(fp,mode='wb') |
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139 | waveobj = wave.open(fp,mode='wb') | |
118 |
waveobj.setnchannels( |
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140 | waveobj.setnchannels(nchan) | |
119 | waveobj.setframerate(rate) |
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141 | waveobj.setframerate(rate) | |
120 | waveobj.setsampwidth(2) |
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142 | waveobj.setsampwidth(2) | |
121 | waveobj.setcomptype('NONE','NONE') |
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143 | waveobj.setcomptype('NONE','NONE') | |
122 | waveobj.writeframes(b''.join([struct.pack('<h',x) for x in scaled])) |
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144 | waveobj.writeframes(b''.join([struct.pack('<h',x) for x in scaled])) | |
123 | val = fp.getvalue() |
|
145 | val = fp.getvalue() | |
124 | waveobj.close() |
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146 | waveobj.close() | |
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147 | ||||
125 |
return val |
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148 | return val | |
126 |
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149 | |||
127 | def _data_and_metadata(self): |
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150 | def _data_and_metadata(self): | |
128 | """shortcut for returning metadata with url information, if defined""" |
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151 | """shortcut for returning metadata with url information, if defined""" | |
129 | md = {} |
|
152 | md = {} | |
130 | if self.url: |
|
153 | if self.url: | |
131 | md['url'] = self.url |
|
154 | md['url'] = self.url | |
132 | if md: |
|
155 | if md: | |
133 | return self.data, md |
|
156 | return self.data, md | |
134 | else: |
|
157 | else: | |
135 | return self.data |
|
158 | return self.data | |
136 |
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159 | |||
137 | def _repr_html_(self): |
|
160 | def _repr_html_(self): | |
138 | src = """ |
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161 | src = """ | |
139 | <audio controls="controls" {autoplay}> |
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162 | <audio controls="controls" {autoplay}> | |
140 | <source src="{src}" type="{type}" /> |
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163 | <source src="{src}" type="{type}" /> | |
141 | Your browser does not support the audio element. |
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164 | Your browser does not support the audio element. | |
142 | </audio> |
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165 | </audio> | |
143 | """ |
|
166 | """ | |
144 | return src.format(src=self.src_attr(),type=self.mimetype, autoplay=self.autoplay_attr()) |
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167 | return src.format(src=self.src_attr(),type=self.mimetype, autoplay=self.autoplay_attr()) | |
145 |
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168 | |||
146 | def src_attr(self): |
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169 | def src_attr(self): | |
147 | import base64 |
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170 | import base64 | |
148 | if self.embed and (self.data is not None): |
|
171 | if self.embed and (self.data is not None): | |
149 | data = base64=base64.b64encode(self.data).decode('ascii') |
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172 | data = base64=base64.b64encode(self.data).decode('ascii') | |
150 | return """data:{type};base64,{base64}""".format(type=self.mimetype, |
|
173 | return """data:{type};base64,{base64}""".format(type=self.mimetype, | |
151 | base64=data) |
|
174 | base64=data) | |
152 | elif self.url is not None: |
|
175 | elif self.url is not None: | |
153 | return self.url |
|
176 | return self.url | |
154 | else: |
|
177 | else: | |
155 | return "" |
|
178 | return "" | |
156 |
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179 | |||
157 | def autoplay_attr(self): |
|
180 | def autoplay_attr(self): | |
158 | if(self.autoplay): |
|
181 | if(self.autoplay): | |
159 | return 'autoplay="autoplay"' |
|
182 | return 'autoplay="autoplay"' | |
160 | else: |
|
183 | else: | |
161 | return '' |
|
184 | return '' | |
162 |
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185 | |||
163 | class IFrame(object): |
|
186 | class IFrame(object): | |
164 | """ |
|
187 | """ | |
165 | Generic class to embed an iframe in an IPython notebook |
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188 | Generic class to embed an iframe in an IPython notebook | |
166 | """ |
|
189 | """ | |
167 |
|
190 | |||
168 | iframe = """ |
|
191 | iframe = """ | |
169 | <iframe |
|
192 | <iframe | |
170 | width="{width}" |
|
193 | width="{width}" | |
171 | height={height}" |
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194 | height={height}" | |
172 | src="{src}{params}" |
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195 | src="{src}{params}" | |
173 | frameborder="0" |
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196 | frameborder="0" | |
174 | allowfullscreen |
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197 | allowfullscreen | |
175 | ></iframe> |
|
198 | ></iframe> | |
176 | """ |
|
199 | """ | |
177 |
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200 | |||
178 | def __init__(self, src, width, height, **kwargs): |
|
201 | def __init__(self, src, width, height, **kwargs): | |
179 | self.src = src |
|
202 | self.src = src | |
180 | self.width = width |
|
203 | self.width = width | |
181 | self.height = height |
|
204 | self.height = height | |
182 | self.params = kwargs |
|
205 | self.params = kwargs | |
183 |
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206 | |||
184 | def _repr_html_(self): |
|
207 | def _repr_html_(self): | |
185 | """return the embed iframe""" |
|
208 | """return the embed iframe""" | |
186 | if self.params: |
|
209 | if self.params: | |
187 | try: |
|
210 | try: | |
188 | from urllib.parse import urlencode # Py 3 |
|
211 | from urllib.parse import urlencode # Py 3 | |
189 | except ImportError: |
|
212 | except ImportError: | |
190 | from urllib import urlencode |
|
213 | from urllib import urlencode | |
191 | params = "?" + urlencode(self.params) |
|
214 | params = "?" + urlencode(self.params) | |
192 | else: |
|
215 | else: | |
193 | params = "" |
|
216 | params = "" | |
194 | return self.iframe.format(src=self.src, |
|
217 | return self.iframe.format(src=self.src, | |
195 | width=self.width, |
|
218 | width=self.width, | |
196 | height=self.height, |
|
219 | height=self.height, | |
197 | params=params) |
|
220 | params=params) | |
198 |
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221 | |||
199 | class YouTubeVideo(IFrame): |
|
222 | class YouTubeVideo(IFrame): | |
200 | """Class for embedding a YouTube Video in an IPython session, based on its video id. |
|
223 | """Class for embedding a YouTube Video in an IPython session, based on its video id. | |
201 |
|
224 | |||
202 | e.g. to embed the video from https://www.youtube.com/watch?v=foo , you would |
|
225 | e.g. to embed the video from https://www.youtube.com/watch?v=foo , you would | |
203 | do:: |
|
226 | do:: | |
204 |
|
227 | |||
205 | vid = YouTubeVideo("foo") |
|
228 | vid = YouTubeVideo("foo") | |
206 | display(vid) |
|
229 | display(vid) | |
207 |
|
230 | |||
208 | To start from 30 seconds:: |
|
231 | To start from 30 seconds:: | |
209 |
|
232 | |||
210 | vid = YouTubeVideo("abc", start=30) |
|
233 | vid = YouTubeVideo("abc", start=30) | |
211 | display(vid) |
|
234 | display(vid) | |
212 |
|
235 | |||
213 | To calculate seconds from time as hours, minutes, seconds use |
|
236 | To calculate seconds from time as hours, minutes, seconds use | |
214 | :class:`datetime.timedelta`:: |
|
237 | :class:`datetime.timedelta`:: | |
215 |
|
238 | |||
216 | start=int(timedelta(hours=1, minutes=46, seconds=40).total_seconds()) |
|
239 | start=int(timedelta(hours=1, minutes=46, seconds=40).total_seconds()) | |
217 |
|
240 | |||
218 | Other parameters can be provided as documented at |
|
241 | Other parameters can be provided as documented at | |
219 | https://developers.google.com/youtube/player_parameters#parameter-subheader |
|
242 | https://developers.google.com/youtube/player_parameters#parameter-subheader | |
220 | """ |
|
243 | """ | |
221 |
|
244 | |||
222 | def __init__(self, id, width=400, height=300, **kwargs): |
|
245 | def __init__(self, id, width=400, height=300, **kwargs): | |
223 | src = "https://www.youtube.com/embed/{0}".format(id) |
|
246 | src = "https://www.youtube.com/embed/{0}".format(id) | |
224 | super(YouTubeVideo, self).__init__(src, width, height, **kwargs) |
|
247 | super(YouTubeVideo, self).__init__(src, width, height, **kwargs) | |
225 |
|
248 | |||
226 | class VimeoVideo(IFrame): |
|
249 | class VimeoVideo(IFrame): | |
227 | """ |
|
250 | """ | |
228 | Class for embedding a Vimeo video in an IPython session, based on its video id. |
|
251 | Class for embedding a Vimeo video in an IPython session, based on its video id. | |
229 | """ |
|
252 | """ | |
230 |
|
253 | |||
231 | def __init__(self, id, width=400, height=300, **kwargs): |
|
254 | def __init__(self, id, width=400, height=300, **kwargs): | |
232 | src="https://player.vimeo.com/video/{0}".format(id) |
|
255 | src="https://player.vimeo.com/video/{0}".format(id) | |
233 | super(VimeoVideo, self).__init__(src, width, height, **kwargs) |
|
256 | super(VimeoVideo, self).__init__(src, width, height, **kwargs) | |
234 |
|
257 | |||
235 | class ScribdDocument(IFrame): |
|
258 | class ScribdDocument(IFrame): | |
236 | """ |
|
259 | """ | |
237 | Class for embedding a Scribd document in an IPython session |
|
260 | Class for embedding a Scribd document in an IPython session | |
238 |
|
261 | |||
239 | Use the start_page params to specify a starting point in the document |
|
262 | Use the start_page params to specify a starting point in the document | |
240 | Use the view_mode params to specify display type one off scroll | slideshow | book |
|
263 | Use the view_mode params to specify display type one off scroll | slideshow | book | |
241 |
|
264 | |||
242 | e.g to Display Wes' foundational paper about PANDAS in book mode from page 3 |
|
265 | e.g to Display Wes' foundational paper about PANDAS in book mode from page 3 | |
243 |
|
266 | |||
244 | ScribdDocument(71048089, width=800, height=400, start_page=3, view_mode="book") |
|
267 | ScribdDocument(71048089, width=800, height=400, start_page=3, view_mode="book") | |
245 | """ |
|
268 | """ | |
246 |
|
269 | |||
247 | def __init__(self, id, width=400, height=300, **kwargs): |
|
270 | def __init__(self, id, width=400, height=300, **kwargs): | |
248 | src="https://www.scribd.com/embeds/{0}/content".format(id) |
|
271 | src="https://www.scribd.com/embeds/{0}/content".format(id) | |
249 | super(ScribdDocument, self).__init__(src, width, height, **kwargs) |
|
272 | super(ScribdDocument, self).__init__(src, width, height, **kwargs) | |
250 |
|
273 | |||
251 | class FileLink(object): |
|
274 | class FileLink(object): | |
252 | """Class for embedding a local file link in an IPython session, based on path |
|
275 | """Class for embedding a local file link in an IPython session, based on path | |
253 |
|
276 | |||
254 | e.g. to embed a link that was generated in the IPython notebook as my/data.txt |
|
277 | e.g. to embed a link that was generated in the IPython notebook as my/data.txt | |
255 |
|
278 | |||
256 | you would do:: |
|
279 | you would do:: | |
257 |
|
280 | |||
258 | local_file = FileLink("my/data.txt") |
|
281 | local_file = FileLink("my/data.txt") | |
259 | display(local_file) |
|
282 | display(local_file) | |
260 |
|
283 | |||
261 | or in the HTML notebook, just:: |
|
284 | or in the HTML notebook, just:: | |
262 |
|
285 | |||
263 | FileLink("my/data.txt") |
|
286 | FileLink("my/data.txt") | |
264 | """ |
|
287 | """ | |
265 |
|
288 | |||
266 | html_link_str = "<a href='%s' target='_blank'>%s</a>" |
|
289 | html_link_str = "<a href='%s' target='_blank'>%s</a>" | |
267 |
|
290 | |||
268 | def __init__(self, |
|
291 | def __init__(self, | |
269 | path, |
|
292 | path, | |
270 | url_prefix='', |
|
293 | url_prefix='', | |
271 | result_html_prefix='', |
|
294 | result_html_prefix='', | |
272 | result_html_suffix='<br>'): |
|
295 | result_html_suffix='<br>'): | |
273 | """ |
|
296 | """ | |
274 | Parameters |
|
297 | Parameters | |
275 | ---------- |
|
298 | ---------- | |
276 | path : str |
|
299 | path : str | |
277 | path to the file or directory that should be formatted |
|
300 | path to the file or directory that should be formatted | |
278 | directory_prefix : str |
|
301 | directory_prefix : str | |
279 | prefix to be prepended to all files to form a working link [default: |
|
302 | prefix to be prepended to all files to form a working link [default: | |
280 | 'files'] |
|
303 | 'files'] | |
281 | result_html_prefix : str |
|
304 | result_html_prefix : str | |
282 | text to append to beginning to link [default: none] |
|
305 | text to append to beginning to link [default: none] | |
283 | result_html_suffix : str |
|
306 | result_html_suffix : str | |
284 | text to append at the end of link [default: '<br>'] |
|
307 | text to append at the end of link [default: '<br>'] | |
285 | """ |
|
308 | """ | |
286 | if isdir(path): |
|
309 | if isdir(path): | |
287 | raise ValueError("Cannot display a directory using FileLink. " |
|
310 | raise ValueError("Cannot display a directory using FileLink. " | |
288 | "Use FileLinks to display '%s'." % path) |
|
311 | "Use FileLinks to display '%s'." % path) | |
289 | self.path = path |
|
312 | self.path = path | |
290 | self.url_prefix = url_prefix |
|
313 | self.url_prefix = url_prefix | |
291 | self.result_html_prefix = result_html_prefix |
|
314 | self.result_html_prefix = result_html_prefix | |
292 | self.result_html_suffix = result_html_suffix |
|
315 | self.result_html_suffix = result_html_suffix | |
293 |
|
316 | |||
294 | def _format_path(self): |
|
317 | def _format_path(self): | |
295 | fp = ''.join([self.url_prefix,self.path]) |
|
318 | fp = ''.join([self.url_prefix,self.path]) | |
296 | return ''.join([self.result_html_prefix, |
|
319 | return ''.join([self.result_html_prefix, | |
297 | self.html_link_str % (fp, self.path), |
|
320 | self.html_link_str % (fp, self.path), | |
298 | self.result_html_suffix]) |
|
321 | self.result_html_suffix]) | |
299 |
|
322 | |||
300 | def _repr_html_(self): |
|
323 | def _repr_html_(self): | |
301 | """return html link to file |
|
324 | """return html link to file | |
302 | """ |
|
325 | """ | |
303 | if not exists(self.path): |
|
326 | if not exists(self.path): | |
304 | return ("Path (<tt>%s</tt>) doesn't exist. " |
|
327 | return ("Path (<tt>%s</tt>) doesn't exist. " | |
305 | "It may still be in the process of " |
|
328 | "It may still be in the process of " | |
306 | "being generated, or you may have the " |
|
329 | "being generated, or you may have the " | |
307 | "incorrect path." % self.path) |
|
330 | "incorrect path." % self.path) | |
308 |
|
331 | |||
309 | return self._format_path() |
|
332 | return self._format_path() | |
310 |
|
333 | |||
311 | def __repr__(self): |
|
334 | def __repr__(self): | |
312 | """return absolute path to file |
|
335 | """return absolute path to file | |
313 | """ |
|
336 | """ | |
314 | return abspath(self.path) |
|
337 | return abspath(self.path) | |
315 |
|
338 | |||
316 | class FileLinks(FileLink): |
|
339 | class FileLinks(FileLink): | |
317 | """Class for embedding local file links in an IPython session, based on path |
|
340 | """Class for embedding local file links in an IPython session, based on path | |
318 |
|
341 | |||
319 | e.g. to embed links to files that were generated in the IPython notebook |
|
342 | e.g. to embed links to files that were generated in the IPython notebook | |
320 | under ``my/data``, you would do:: |
|
343 | under ``my/data``, you would do:: | |
321 |
|
344 | |||
322 | local_files = FileLinks("my/data") |
|
345 | local_files = FileLinks("my/data") | |
323 | display(local_files) |
|
346 | display(local_files) | |
324 |
|
347 | |||
325 | or in the HTML notebook, just:: |
|
348 | or in the HTML notebook, just:: | |
326 |
|
349 | |||
327 | FileLinks("my/data") |
|
350 | FileLinks("my/data") | |
328 | """ |
|
351 | """ | |
329 | def __init__(self, |
|
352 | def __init__(self, | |
330 | path, |
|
353 | path, | |
331 | url_prefix='', |
|
354 | url_prefix='', | |
332 | included_suffixes=None, |
|
355 | included_suffixes=None, | |
333 | result_html_prefix='', |
|
356 | result_html_prefix='', | |
334 | result_html_suffix='<br>', |
|
357 | result_html_suffix='<br>', | |
335 | notebook_display_formatter=None, |
|
358 | notebook_display_formatter=None, | |
336 | terminal_display_formatter=None): |
|
359 | terminal_display_formatter=None): | |
337 | """ |
|
360 | """ | |
338 | See :class:`FileLink` for the ``path``, ``url_prefix``, |
|
361 | See :class:`FileLink` for the ``path``, ``url_prefix``, | |
339 | ``result_html_prefix`` and ``result_html_suffix`` parameters. |
|
362 | ``result_html_prefix`` and ``result_html_suffix`` parameters. | |
340 |
|
363 | |||
341 | included_suffixes : list |
|
364 | included_suffixes : list | |
342 | Filename suffixes to include when formatting output [default: include |
|
365 | Filename suffixes to include when formatting output [default: include | |
343 | all files] |
|
366 | all files] | |
344 |
|
367 | |||
345 | notebook_display_formatter : function |
|
368 | notebook_display_formatter : function | |
346 | Used to format links for display in the notebook. See discussion of |
|
369 | Used to format links for display in the notebook. See discussion of | |
347 | formatter functions below. |
|
370 | formatter functions below. | |
348 |
|
371 | |||
349 | terminal_display_formatter : function |
|
372 | terminal_display_formatter : function | |
350 | Used to format links for display in the terminal. See discussion of |
|
373 | Used to format links for display in the terminal. See discussion of | |
351 | formatter functions below. |
|
374 | formatter functions below. | |
352 |
|
375 | |||
353 | Formatter functions must be of the form:: |
|
376 | Formatter functions must be of the form:: | |
354 |
|
377 | |||
355 | f(dirname, fnames, included_suffixes) |
|
378 | f(dirname, fnames, included_suffixes) | |
356 |
|
379 | |||
357 | dirname : str |
|
380 | dirname : str | |
358 | The name of a directory |
|
381 | The name of a directory | |
359 | fnames : list |
|
382 | fnames : list | |
360 | The files in that directory |
|
383 | The files in that directory | |
361 | included_suffixes : list |
|
384 | included_suffixes : list | |
362 | The file suffixes that should be included in the output (passing None |
|
385 | The file suffixes that should be included in the output (passing None | |
363 | meansto include all suffixes in the output in the built-in formatters) |
|
386 | meansto include all suffixes in the output in the built-in formatters) | |
364 |
|
387 | |||
365 | The function should return a list of lines that will be printed in the |
|
388 | The function should return a list of lines that will be printed in the | |
366 | notebook (if passing notebook_display_formatter) or the terminal (if |
|
389 | notebook (if passing notebook_display_formatter) or the terminal (if | |
367 | passing terminal_display_formatter). This function is iterated over for |
|
390 | passing terminal_display_formatter). This function is iterated over for | |
368 | each directory in self.path. Default formatters are in place, can be |
|
391 | each directory in self.path. Default formatters are in place, can be | |
369 | passed here to support alternative formatting. |
|
392 | passed here to support alternative formatting. | |
370 |
|
393 | |||
371 | """ |
|
394 | """ | |
372 | if isfile(path): |
|
395 | if isfile(path): | |
373 | raise ValueError("Cannot display a file using FileLinks. " |
|
396 | raise ValueError("Cannot display a file using FileLinks. " | |
374 | "Use FileLink to display '%s'." % path) |
|
397 | "Use FileLink to display '%s'." % path) | |
375 | self.included_suffixes = included_suffixes |
|
398 | self.included_suffixes = included_suffixes | |
376 | # remove trailing slashs for more consistent output formatting |
|
399 | # remove trailing slashs for more consistent output formatting | |
377 | path = path.rstrip('/') |
|
400 | path = path.rstrip('/') | |
378 |
|
401 | |||
379 | self.path = path |
|
402 | self.path = path | |
380 | self.url_prefix = url_prefix |
|
403 | self.url_prefix = url_prefix | |
381 | self.result_html_prefix = result_html_prefix |
|
404 | self.result_html_prefix = result_html_prefix | |
382 | self.result_html_suffix = result_html_suffix |
|
405 | self.result_html_suffix = result_html_suffix | |
383 |
|
406 | |||
384 | self.notebook_display_formatter = \ |
|
407 | self.notebook_display_formatter = \ | |
385 | notebook_display_formatter or self._get_notebook_display_formatter() |
|
408 | notebook_display_formatter or self._get_notebook_display_formatter() | |
386 | self.terminal_display_formatter = \ |
|
409 | self.terminal_display_formatter = \ | |
387 | terminal_display_formatter or self._get_terminal_display_formatter() |
|
410 | terminal_display_formatter or self._get_terminal_display_formatter() | |
388 |
|
411 | |||
389 | def _get_display_formatter(self, |
|
412 | def _get_display_formatter(self, | |
390 | dirname_output_format, |
|
413 | dirname_output_format, | |
391 | fname_output_format, |
|
414 | fname_output_format, | |
392 | fp_format, |
|
415 | fp_format, | |
393 | fp_cleaner=None): |
|
416 | fp_cleaner=None): | |
394 | """ generate built-in formatter function |
|
417 | """ generate built-in formatter function | |
395 |
|
418 | |||
396 | this is used to define both the notebook and terminal built-in |
|
419 | this is used to define both the notebook and terminal built-in | |
397 | formatters as they only differ by some wrapper text for each entry |
|
420 | formatters as they only differ by some wrapper text for each entry | |
398 |
|
421 | |||
399 | dirname_output_format: string to use for formatting directory |
|
422 | dirname_output_format: string to use for formatting directory | |
400 | names, dirname will be substituted for a single "%s" which |
|
423 | names, dirname will be substituted for a single "%s" which | |
401 | must appear in this string |
|
424 | must appear in this string | |
402 | fname_output_format: string to use for formatting file names, |
|
425 | fname_output_format: string to use for formatting file names, | |
403 | if a single "%s" appears in the string, fname will be substituted |
|
426 | if a single "%s" appears in the string, fname will be substituted | |
404 | if two "%s" appear in the string, the path to fname will be |
|
427 | if two "%s" appear in the string, the path to fname will be | |
405 | substituted for the first and fname will be substituted for the |
|
428 | substituted for the first and fname will be substituted for the | |
406 | second |
|
429 | second | |
407 | fp_format: string to use for formatting filepaths, must contain |
|
430 | fp_format: string to use for formatting filepaths, must contain | |
408 | exactly two "%s" and the dirname will be subsituted for the first |
|
431 | exactly two "%s" and the dirname will be subsituted for the first | |
409 | and fname will be substituted for the second |
|
432 | and fname will be substituted for the second | |
410 | """ |
|
433 | """ | |
411 | def f(dirname, fnames, included_suffixes=None): |
|
434 | def f(dirname, fnames, included_suffixes=None): | |
412 | result = [] |
|
435 | result = [] | |
413 | # begin by figuring out which filenames, if any, |
|
436 | # begin by figuring out which filenames, if any, | |
414 | # are going to be displayed |
|
437 | # are going to be displayed | |
415 | display_fnames = [] |
|
438 | display_fnames = [] | |
416 | for fname in fnames: |
|
439 | for fname in fnames: | |
417 | if (isfile(join(dirname,fname)) and |
|
440 | if (isfile(join(dirname,fname)) and | |
418 | (included_suffixes == None or |
|
441 | (included_suffixes == None or | |
419 | splitext(fname)[1] in included_suffixes)): |
|
442 | splitext(fname)[1] in included_suffixes)): | |
420 | display_fnames.append(fname) |
|
443 | display_fnames.append(fname) | |
421 |
|
444 | |||
422 | if len(display_fnames) == 0: |
|
445 | if len(display_fnames) == 0: | |
423 | # if there are no filenames to display, don't print anything |
|
446 | # if there are no filenames to display, don't print anything | |
424 | # (not even the directory name) |
|
447 | # (not even the directory name) | |
425 | pass |
|
448 | pass | |
426 | else: |
|
449 | else: | |
427 | # otherwise print the formatted directory name followed by |
|
450 | # otherwise print the formatted directory name followed by | |
428 | # the formatted filenames |
|
451 | # the formatted filenames | |
429 | dirname_output_line = dirname_output_format % dirname |
|
452 | dirname_output_line = dirname_output_format % dirname | |
430 | result.append(dirname_output_line) |
|
453 | result.append(dirname_output_line) | |
431 | for fname in display_fnames: |
|
454 | for fname in display_fnames: | |
432 | fp = fp_format % (dirname,fname) |
|
455 | fp = fp_format % (dirname,fname) | |
433 | if fp_cleaner is not None: |
|
456 | if fp_cleaner is not None: | |
434 | fp = fp_cleaner(fp) |
|
457 | fp = fp_cleaner(fp) | |
435 | try: |
|
458 | try: | |
436 | # output can include both a filepath and a filename... |
|
459 | # output can include both a filepath and a filename... | |
437 | fname_output_line = fname_output_format % (fp, fname) |
|
460 | fname_output_line = fname_output_format % (fp, fname) | |
438 | except TypeError: |
|
461 | except TypeError: | |
439 | # ... or just a single filepath |
|
462 | # ... or just a single filepath | |
440 | fname_output_line = fname_output_format % fname |
|
463 | fname_output_line = fname_output_format % fname | |
441 | result.append(fname_output_line) |
|
464 | result.append(fname_output_line) | |
442 | return result |
|
465 | return result | |
443 | return f |
|
466 | return f | |
444 |
|
467 | |||
445 | def _get_notebook_display_formatter(self, |
|
468 | def _get_notebook_display_formatter(self, | |
446 | spacer=" "): |
|
469 | spacer=" "): | |
447 | """ generate function to use for notebook formatting |
|
470 | """ generate function to use for notebook formatting | |
448 | """ |
|
471 | """ | |
449 | dirname_output_format = \ |
|
472 | dirname_output_format = \ | |
450 | self.result_html_prefix + "%s/" + self.result_html_suffix |
|
473 | self.result_html_prefix + "%s/" + self.result_html_suffix | |
451 | fname_output_format = \ |
|
474 | fname_output_format = \ | |
452 | self.result_html_prefix + spacer + self.html_link_str + self.result_html_suffix |
|
475 | self.result_html_prefix + spacer + self.html_link_str + self.result_html_suffix | |
453 | fp_format = self.url_prefix + '%s/%s' |
|
476 | fp_format = self.url_prefix + '%s/%s' | |
454 | if sep == "\\": |
|
477 | if sep == "\\": | |
455 | # Working on a platform where the path separator is "\", so |
|
478 | # Working on a platform where the path separator is "\", so | |
456 | # must convert these to "/" for generating a URI |
|
479 | # must convert these to "/" for generating a URI | |
457 | def fp_cleaner(fp): |
|
480 | def fp_cleaner(fp): | |
458 | # Replace all occurences of backslash ("\") with a forward |
|
481 | # Replace all occurences of backslash ("\") with a forward | |
459 | # slash ("/") - this is necessary on windows when a path is |
|
482 | # slash ("/") - this is necessary on windows when a path is | |
460 | # provided as input, but we must link to a URI |
|
483 | # provided as input, but we must link to a URI | |
461 | return fp.replace('\\','/') |
|
484 | return fp.replace('\\','/') | |
462 | else: |
|
485 | else: | |
463 | fp_cleaner = None |
|
486 | fp_cleaner = None | |
464 |
|
487 | |||
465 | return self._get_display_formatter(dirname_output_format, |
|
488 | return self._get_display_formatter(dirname_output_format, | |
466 | fname_output_format, |
|
489 | fname_output_format, | |
467 | fp_format, |
|
490 | fp_format, | |
468 | fp_cleaner) |
|
491 | fp_cleaner) | |
469 |
|
492 | |||
470 | def _get_terminal_display_formatter(self, |
|
493 | def _get_terminal_display_formatter(self, | |
471 | spacer=" "): |
|
494 | spacer=" "): | |
472 | """ generate function to use for terminal formatting |
|
495 | """ generate function to use for terminal formatting | |
473 | """ |
|
496 | """ | |
474 | dirname_output_format = "%s/" |
|
497 | dirname_output_format = "%s/" | |
475 | fname_output_format = spacer + "%s" |
|
498 | fname_output_format = spacer + "%s" | |
476 | fp_format = '%s/%s' |
|
499 | fp_format = '%s/%s' | |
477 |
|
500 | |||
478 | return self._get_display_formatter(dirname_output_format, |
|
501 | return self._get_display_formatter(dirname_output_format, | |
479 | fname_output_format, |
|
502 | fname_output_format, | |
480 | fp_format) |
|
503 | fp_format) | |
481 |
|
504 | |||
482 | def _format_path(self): |
|
505 | def _format_path(self): | |
483 | result_lines = [] |
|
506 | result_lines = [] | |
484 | walked_dir = list(walk(self.path)) |
|
507 | walked_dir = list(walk(self.path)) | |
485 | walked_dir.sort() |
|
508 | walked_dir.sort() | |
486 | for dirname, subdirs, fnames in walked_dir: |
|
509 | for dirname, subdirs, fnames in walked_dir: | |
487 | result_lines += self.notebook_display_formatter(dirname, fnames, self.included_suffixes) |
|
510 | result_lines += self.notebook_display_formatter(dirname, fnames, self.included_suffixes) | |
488 | return '\n'.join(result_lines) |
|
511 | return '\n'.join(result_lines) | |
489 |
|
512 | |||
490 | def __repr__(self): |
|
513 | def __repr__(self): | |
491 | """return newline-separated absolute paths |
|
514 | """return newline-separated absolute paths | |
492 | """ |
|
515 | """ | |
493 | result_lines = [] |
|
516 | result_lines = [] | |
494 | walked_dir = list(walk(self.path)) |
|
517 | walked_dir = list(walk(self.path)) | |
495 | walked_dir.sort() |
|
518 | walked_dir.sort() | |
496 | for dirname, subdirs, fnames in walked_dir: |
|
519 | for dirname, subdirs, fnames in walked_dir: | |
497 | result_lines += self.terminal_display_formatter(dirname, fnames, self.included_suffixes) |
|
520 | result_lines += self.terminal_display_formatter(dirname, fnames, self.included_suffixes) | |
498 | return '\n'.join(result_lines) |
|
521 | return '\n'.join(result_lines) |
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