annotate env/lib/python3.7/site-packages/bagit-1.7.0-py3.7.egg-info/PKG-INFO @ 3:758bc20232e8 draft

"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author shellac
date Thu, 14 May 2020 16:20:52 -0400
parents 26e78fe6e8c4
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1 Metadata-Version: 1.1
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2 Name: bagit
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3 Version: 1.7.0
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4 Summary: Create and validate BagIt packages
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5 Home-page: https://libraryofcongress.github.io/bagit-python/
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6 Author: Ed Summers
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7 Author-email: ehs@pobox.com
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8 License: UNKNOWN
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9 Description: bagit-python
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10 ============
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11
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12 |Build Status| |Coverage Status|
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13
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14 bagit is a Python library and command line utility for working with
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15 `BagIt <http://purl.org/net/bagit>`__ style packages.
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16
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17 Installation
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18 ------------
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19
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20 bagit.py is a single-file python module that you can drop into your
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21 project as needed or you can install globally with:
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22
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23 ::
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24
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25 pip install bagit
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26
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27 Python v2.7+ is required.
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28
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29 Command Line Usage
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30 ------------------
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31
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32 When you install bagit you should get a command-line program called
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33 bagit.py which you can use to turn an existing directory into a bag:
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34
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35 ::
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36
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37 bagit.py --contact-name 'John Kunze' /directory/to/bag
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38
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39 Finding Bagit on your system
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40 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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41
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42 The ``bagit.py`` program should be available in your normal command-line
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43 window (Terminal on OS X, Command Prompt or Powershell on Windows,
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44 etc.). If you are unsure where it was installed you can also request
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45 that Python search for ``bagit`` as a Python module: simply replace
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46 ``bagit.py`` with ``python -m bagit``:
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47
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48 ::
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49
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50 python -m bagit --help
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51
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52 On some systems Python may have been installed as ``python3``, ``py``,
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53 etc. – simply use the same name you use to start an interactive Python
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54 shell:
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55
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56 ::
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57
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58 py -m bagit --help
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59 python3 -m bagit --help
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60
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61 Configuring BagIt
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62 ~~~~~~~~~~~~~~~~~
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63
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64 You can pass in key/value metadata for the bag using options like
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65 ``--contact-name`` above, which get persisted to the bag-info.txt. For a
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66 complete list of bag-info.txt properties you can use as commmand line
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67 arguments see ``--help``.
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68
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69 Since calculating checksums can take a while when creating a bag, you
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70 may want to calculate them in parallel if you are on a multicore
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71 machine. You can do that with the ``--processes`` option:
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72
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73 ::
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74
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75 bagit.py --processes 4 /directory/to/bag
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76
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77 To specify which checksum algorithm(s) to use when generating the
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78 manifest, use the --md5, --sha1, --sha256 and/or --sha512 flags (MD5 is
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79 generated by default).
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80
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81 ::
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82
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83 bagit.py --sha1 /path/to/bag
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84 bagit.py --sha256 /path/to/bag
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85 bagit.py --sha512 /path/to/bag
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86
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87 If you would like to validate a bag you can use the --validate flag.
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88
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89 ::
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90
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91 bagit.py --validate /path/to/bag
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92
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93 If you would like to take a quick look at the bag to see if it seems
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94 valid by just examining the structure of the bag, and comparing its
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95 payload-oxum (byte count and number of files) then use the ``--fast``
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96 flag.
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97
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98 ::
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99
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100 bagit.py --validate --fast /path/to/bag
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101
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102 And finally, if you'd like to parallelize validation to take advantage
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103 of multiple CPUs you can:
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104
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105 ::
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106
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107 bagit.py --validate --processes 4 /path/to/bag
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108
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109 Using BagIt in your programs
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110 ----------------------------
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111
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112 You can also use BagIt programatically in your own Python programs by
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113 importing the ``bagit`` module.
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114
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115 Create
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116 ~~~~~~
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117
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118 To create a bag you would do this:
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119
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120 .. code:: python
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121
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122 bag = bagit.make_bag('mydir', {'Contact-Name': 'John Kunze'})
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123
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124 ``make_bag`` returns a Bag instance. If you have a bag already on disk
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125 and would like to create a Bag instance for it, simply call the
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126 constructor directly:
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127
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128 .. code:: python
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129
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130 bag = bagit.Bag('/path/to/bag')
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131
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132 Update Bag Metadata
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133 ~~~~~~~~~~~~~~~~~~~
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134
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135 You can change the metadata persisted to the bag-info.txt by using the
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136 ``info`` property on a ``Bag``.
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137
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138 .. code:: python
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139
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140 # load the bag
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141 bag = bagit.Bag('/path/to/bag')
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142
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143 # update bag info metadata
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144 bag.info['Internal-Sender-Description'] = 'Updated on 2014-06-28.'
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145 bag.info['Authors'] = ['John Kunze', 'Andy Boyko']
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146 bag.save()
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147
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148 Update Bag Manifests
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149 ~~~~~~~~~~~~~~~~~~~~
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150
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151 By default ``save`` will not update manifests. This guards against a
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152 situation where a call to ``save`` to persist bag metadata accidentally
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153 regenerates manifests for an invalid bag. If you have modified the
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154 payload of a bag by adding, modifying or deleting files in the data
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155 directory, and wish to regenerate the manifests set the ``manifests``
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156 parameter to True when calling ``save``.
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157
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158 .. code:: python
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159
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160
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161 import shutil, os
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162
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163 # add a file
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164 shutil.copyfile('newfile', '/path/to/bag/data/newfile')
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165
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166 # remove a file
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167 os.remove('/path/to/bag/data/file')
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168
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169 # persist changes
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170 bag.save(manifests=True)
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171
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172 The save method takes an optional processes parameter which will
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173 determine how many processes are used to regenerate the checksums. This
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174 can be handy on multicore machines.
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175
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176 Validation
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177 ~~~~~~~~~~
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178
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179 If you would like to see if a bag is valid, use its ``is_valid`` method:
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180
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181 .. code:: python
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182
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183 bag = bagit.Bag('/path/to/bag')
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184 if bag.is_valid():
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185 print("yay :)")
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186 else:
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187 print("boo :(")
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188
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189 If you'd like to get a detailed list of validation errors, execute the
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190 ``validate`` method and catch the ``BagValidationError`` exception. If
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191 the bag's manifest was invalid (and it wasn't caught by the payload
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192 oxum) the exception's ``details`` property will contain a list of
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193 ``ManifestError``\ s that you can introspect on. Each ManifestError,
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194 will be of type ``ChecksumMismatch``, ``FileMissing``,
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195 ``UnexpectedFile``.
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196
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197 So for example if you want to print out checksums that failed to
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198 validate you can do this:
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199
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200 .. code:: python
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201
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202
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203 bag = bagit.Bag("/path/to/bag")
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204
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205 try:
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206 bag.validate()
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207
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208 except bagit.BagValidationError as e:
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209 for d in e.details:
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210 if isinstance(d, bagit.ChecksumMismatch):
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211 print("expected %s to have %s checksum of %s but found %s" %
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212 (d.path, d.algorithm, d.expected, d.found))
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213
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214 To iterate through a bag's manifest and retrieve checksums for the
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215 payload files use the bag's entries dictionary:
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216
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217 .. code:: python
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218
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219 bag = bagit.Bag("/path/to/bag")
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220
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221 for path, fixity in bag.entries.items():
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222 print("path:%s md5:%s" % (path, fixity["md5"]))
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223
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224 Contributing to bagit-python development
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225 ----------------------------------------
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226
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227 ::
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228
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229 % git clone git://github.com/LibraryOfCongress/bagit-python.git
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230 % cd bagit-python
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231 # MAKE CHANGES
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232 % python test.py
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233
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234 Running the tests
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235 ~~~~~~~~~~~~~~~~~
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236
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237 You can quickly run the tests by having setuptools install dependencies:
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238
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239 ::
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240
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241 python setup.py test
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242
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243 Once your code is working, you can use
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244 `Tox <https://tox.readthedocs.io/>`__ to run the tests with every
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245 supported version of Python which you have installed on the local
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246 system:
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247
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248 ::
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249
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250 tox
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251
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252 If you have Docker installed, you can run the tests under Linux inside a
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253 container:
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254
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255 ::
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256
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257 % docker build -t bagit:latest . && docker run -it bagit:latest
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258
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259 Benchmarks
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260 ----------
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261
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262 If you'd like to see how increasing parallelization of bag creation on
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263 your system effects the time to create a bag try using the included
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264 bench utility:
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265
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266 ::
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267
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268 % ./bench.py
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269
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270 License
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271 -------
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272
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273 |cc0|
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274
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275 Note: By contributing to this project, you agree to license your work
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276 under the same terms as those that govern this project's distribution.
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277
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278 .. |Build Status| image:: https://travis-ci.org/LibraryOfCongress/bagit-python.svg?branch=master
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279 :target: http://travis-ci.org/LibraryOfCongress/bagit-python
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280 .. |Coverage Status| image:: https://coveralls.io/repos/github/LibraryOfCongress/bagit-python/badge.svg?branch=master
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281 :target: https://coveralls.io/github/LibraryOfCongress/bagit-python?branch=master
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282 .. |cc0| image:: http://i.creativecommons.org/p/zero/1.0/88x31.png
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283 :target: http://creativecommons.org/publicdomain/zero/1.0/
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284
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285 Platform: POSIX
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286 Classifier: License :: Public Domain
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287 Classifier: Intended Audience :: Developers
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288 Classifier: Topic :: Communications :: File Sharing
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289 Classifier: Topic :: Software Development :: Libraries :: Python Modules
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290 Classifier: Topic :: System :: Filesystems
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291 Classifier: Programming Language :: Python :: 2.7
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292 Classifier: Programming Language :: Python :: 3.1
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293 Classifier: Programming Language :: Python :: 3.2
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294 Classifier: Programming Language :: Python :: 3.3
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295 Classifier: Programming Language :: Python :: 3.4
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296 Classifier: Programming Language :: Python :: 3.5
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297 Classifier: Programming Language :: Python :: 3.6