使用 plistlib 为 python 2 中的键处理具有 3,006 个值的 iTunes plist

Question

我正在尝试在 Mac OS El Capitan 系统上使用 Python 2.7 下的 plistlib 处理 iTunes plist。问题是 get('Tracks') returns 3,006 个值显然丢失了它们的子键。如果我的目标是定位和更改 SPECIFIC 轨道的数据而不是写回 plist，我该如何处理？

如前一段所述，我需要帮助的恰恰是：打印轨道列出所有子键值，但不是子键本身。鉴于并非所有键都被隔离存在，我如何检索特定轨道的键值？

这是我的测试代码：

import plistlib as pl

plist = pl.readPist('/Users/bryandunphy/Music/iTunes HQR/iTunes Library.xml')
tracks = pl.get('Tracks')
print tracks

这是一个示例数据记录，我认为它包含所有可能的子键（如果键是空字符串、False 或数字 0，则不存在键）：

    <key>2655</key>
    <dict>
        <key>Track ID</key><integer>2655</integer>
        <key>Size</key><integer>8558199</integer>
        <key>Total Time</key><integer>210120</integer>
        <key>Disc Number</key><integer>1</integer>
        <key>Disc Count</key><integer>2</integer>
        <key>Track Number</key><integer>5</integer>
        <key>Track Count</key><integer>17</integer>
        <key>Date Modified</key><date>2016-12-15T02:13:07Z</date>
        <key>Date Added</key><date>2016-12-14T11:32:46Z</date>
        <key>Bit Rate</key><integer>320</integer>
        <key>Sample Rate</key><integer>44100</integer>
        <key>Persistent ID</key><string>7BD213A791587573</string>
        <key>Track Type</key><string>File</string>
        <key>File Type</key><integer>1295270176</integer>
        <key>File Folder Count</key><integer>5</integer>
        <key>Library Folder Count</key><integer>1</integer>
        <key>Name</key><string>Born To Be Wild</string>
        <key>Artist</key><string>Steppenwolf</string>
        <key>Album Artist</key><string>Steppenwolf</string>
        <key>Album</key><string>Born To Be Wild: A Retrospective</string>
        <key>Genre</key><string>Rock</string>
        <key>Kind</key><string>AAC audio file</string>
        <key>Sort Album Artist</key><string>Steppenwolf</string>
        <key>Location</key><string>file:///Users/bryandunphy/Music/iTunes%20HQR/iTunes%20Media/Music/Steppenwolf/Born%20To%20Be%20Wild_%20A%20Retrospective/1-05%20Born%20To%20Be%20Wild.m4a</string>
    </dict>

记录上方文件的顶部是：

    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
    <plist version="1.0">
    <dict>
        <key>Major Version</key><integer>1</integer>
        <key>Minor Version</key><integer>1</integer>
        <key>Application Version</key><string>12.5.4.42</string>
        <key>Date</key><date>2017-01-02T02:41:51Z</date>
        <key>Features</key><integer>5</integer>
        <key>Show Content Ratings</key><true/>
        <key>Library Persistent ID</key><string>4FA8621533B66A9E</string>
        <key>Tracks</key>
    <dict>

Answer 1

假设您的 iTunes plist 文件是这样的：

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <key>Major Version</key><integer>1</integer>
  <key>Minor Version</key><integer>1</integer>
  <key>Application Version</key><string>4.6</string>
  <key>Music Folder</key>
    <string>/Users/bryandunphy/Music/iTunes HQR/iTunes Library.xml</string>
  <key>Library Persistent ID</key><string>8E84CC790968E27F</string>
  <key>Tracks</key>
  <dict>
    <key>2655</key>
    <dict>
        <key>Track ID</key><integer>2655</integer>
        <key>Size</key><integer>8558199</integer>
        <key>Total Time</key><integer>210120</integer>
        <key>Disc Number</key><integer>1</integer>
        <key>Disc Count</key><integer>2</integer>
        <key>Track Number</key><integer>5</integer>
        <key>Track Count</key><integer>17</integer>
        <key>Date Modified</key><date>2016-12-15T02:13:07Z</date>
        <key>Date Added</key><date>2016-12-14T11:32:46Z</date>
        <key>Bit Rate</key><integer>320</integer>
        <key>Sample Rate</key><integer>44100</integer>
        <key>Persistent ID</key><string>7BD213A791587573</string>
        <key>Track Type</key><string>File</string>
        <key>File Type</key><integer>1295270176</integer>
        <key>File Folder Count</key><integer>5</integer>
        <key>Library Folder Count</key><integer>1</integer>
        <key>Name</key><string>Born To Be Wild</string>
        <key>Artist</key><string>Steppenwolf</string>
        <key>Album Artist</key><string>Steppenwolf</string>
        <key>Album</key><string>Born To Be Wild: A Retrospective</string>
        <key>Genre</key><string>Rock</string>
        <key>Kind</key><string>AAC audio file</string>
        <key>Sort Album Artist</key><string>Steppenwolf</string>
        <key>Location</key><string>file:///Users/bryandunphy/Music/iTunes%20HQR/iTunes%20Media/Music/Steppenwolf/Born%20To%20Be%20Wild_%20A%20Retrospective/1-05%20Born%20To%20Be%20Wild.m4a</string>
    </dict>
  </dict>
</dict>
</plist>

您的测试代码将输出这样的字典：

{'2655': {'Album': 'Born To Be Wild: A Retrospective', 'Persistent ID': '7BD213A791587573', 'Track Number': 5, 'Album Artist': 'Steppenwolf', 'Track Type': 'File', 'File Folder Count': 5, 'Disc Number': 1, 'Total Time': 210120, 'Artist': 'Steppenwolf', 'Track Count': 17, 'Genre': 'Rock', 'Bit Rate': 320, 'Kind': 'AAC audio file', 'Name': 'Born To Be Wild', 'Sample Rate': 44100, 'Disc Count': 2, 'Sort Album Artist': 'Steppenwolf', 'File Type': 1295270176, 'Track ID': 2655, 'Location': 'file:///Users/bryandunphy/Music/iTunes%20HQR/iTunes%20Media/Music/Steppenwolf/Born%20To%20Be%20Wild_%20A%20Retrospective/1-05%20Born%20To%20Be%20Wild.m4a', 'Date Modified': datetime.datetime(2016, 12, 15, 2, 13, 7), 'Library Folder Count': 1, 'Date Added': datetime.datetime(2016, 12, 14, 11, 32, 46), 'Size': 8558199}}

如果你想得到每个轨道的子键值，你可以这样编码：

for id, track_info in tracks.items():
    print id, track_info.values()

输出如下：

2655 ['Born To Be Wild: A Retrospective', '7BD213A791587573', 5, 'Steppenwolf', 'File', 5, 1, 210120, 'Steppenwolf', 17, 'Rock', 320, 'AAC audio file', 'Born To Be Wild', 44100, 2, 'Steppenwolf', 1295270176, 2655, 'file:///Users/bryandunphy/Music/iTunes%20HQR/iTunes%20Media/Music/Steppenwolf/Born%20To%20Be%20Wild_%20A%20Retrospective/1-05%20Born%20To%20Be%20Wild.m4a', datetime.datetime(2016, 12, 15, 2, 13, 7), 1, datetime.datetime(2016, 12, 14, 11, 32, 46), 8558199]

您可以改用 track_info.items()，这样您就可以获得这样的键值对：

2655 [('Album', 'Born To Be Wild: A Retrospective'), ('Persistent ID', '7BD213A791587573'), ('Track Number', 5), ('Album Artist', 'Steppenwolf'), ('Track Type', 'File'), ('File Folder Count', 5), ('Disc Number', 1), ('Total Time', 210120), ('Artist', 'Steppenwolf'), ('Track Count', 17), ('Genre', 'Rock'), ('Bit Rate', 320), ('Kind', 'AAC audio file'), ('Name', 'Born To Be Wild'), ('Sample Rate', 44100), ('Disc Count', 2), ('Sort Album Artist', 'Steppenwolf'), ('File Type', 1295270176), ('Track ID', 2655), ('Location', 'file:///Users/bryandunphy/Music/iTunes%20HQR/iTunes%20Media/Music/Steppenwolf/Born%20To%20Be%20Wild_%20A%20Retrospective/1-05%20Born%20To%20Be%20Wild.m4a'), ('Date Modified', datetime.datetime(2016, 12, 15, 2, 13, 7)), ('Library Folder Count', 1), ('Date Added', datetime.datetime(2016, 12, 14, 11, 32, 46)), ('Size', 8558199)]

使用 plistlib 为 python 2 中的键处理具有 3,006 个值的 iTunes plist

handling iTunes plist with 3,006 values for key in python 2 with plistlib

python

plist

python-2.x

plistlib