Mercurial > repos > bcclaywell > argo_navis

annotate venv/lib/python2.7/site-packages/github/PaginatedList.py @ 0:d67268158946 draft

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planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
author bcclaywell
date Mon, 12 Oct 2015 17:43:33 -0400
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1 # -*- coding: utf-8 -*-
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2
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3 # ########################## Copyrights and license ############################
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4 # #
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5 # Copyright 2012 Vincent Jacques <vincent@vincent-jacques.net> #
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6 # Copyright 2012 Zearin <zearin@gonk.net> #
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7 # Copyright 2013 AKFish <akfish@gmail.com> #
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8 # Copyright 2013 Bill Mill <bill.mill@gmail.com> #
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9 # Copyright 2013 Vincent Jacques <vincent@vincent-jacques.net> #
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10 # Copyright 2013 davidbrai <davidbrai@gmail.com> #
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11 # #
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12 # This file is part of PyGithub. http://jacquev6.github.com/PyGithub/ #
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13 # #
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14 # PyGithub is free software: you can redistribute it and/or modify it under #
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15 # the terms of the GNU Lesser General Public License as published by the Free #
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16 # Software Foundation, either version 3 of the License, or (at your option) #
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17 # any later version. #
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18 # #
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19 # PyGithub is distributed in the hope that it will be useful, but WITHOUT ANY #
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20 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS #
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21 # FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more #
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22 # details. #
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23 # #
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24 # You should have received a copy of the GNU Lesser General Public License #
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25 # along with PyGithub. If not, see <http://www.gnu.org/licenses/>. #
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26 # #
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27 # ##############################################################################
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28
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29 import github.GithubObject
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30
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31
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32 class PaginatedListBase:
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33 def __init__(self):
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34 self.__elements = list()
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35
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36 def __getitem__(self, index):
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37 assert isinstance(index, (int, slice))
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38 if isinstance(index, (int, long)):
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39 self.__fetchToIndex(index)
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40 return self.__elements[index]
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41 else:
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42 return self._Slice(self, index)
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43
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44 def __iter__(self):
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45 for element in self.__elements:
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46 yield element
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47 while self._couldGrow():
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48 newElements = self._grow()
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49 for element in newElements:
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50 yield element
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51
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52 def _isBiggerThan(self, index):
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53 return len(self.__elements) > index or self._couldGrow()
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54
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55 def __fetchToIndex(self, index):
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56 while len(self.__elements) <= index and self._couldGrow():
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57 self._grow()
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58
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59 def _grow(self):
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60 newElements = self._fetchNextPage()
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61 self.__elements += newElements
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62 return newElements
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63
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64 class _Slice:
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65 def __init__(self, theList, theSlice):
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66 self.__list = theList
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67 self.__start = theSlice.start or 0
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68 self.__stop = theSlice.stop
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69 self.__step = theSlice.step or 1
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70
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71 def __iter__(self):
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72 index = self.__start
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73 while not self.__finished(index):
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74 if self.__list._isBiggerThan(index):
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75 yield self.__list[index]
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76 index += self.__step
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77 else:
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78 return
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79
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80 def __finished(self, index):
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81 return self.__stop is not None and index >= self.__stop
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82
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83
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84 class PaginatedList(PaginatedListBase):
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85 """
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86 This class abstracts the `pagination of the API <http://developer.github.com/v3/#pagination>`_.
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87
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88 You can simply enumerate through instances of this class::
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89
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90 for repo in user.get_repos():
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91 print repo.name
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92
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93 You can also index them or take slices::
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94
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95 second_repo = user.get_repos()[1]
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96 first_repos = user.get_repos()[:10]
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97
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98 If you want to iterate in reversed order, just do::
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99
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100 for repo in user.get_repos().reversed:
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101 print repo.name
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102
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103 And if you really need it, you can explicitely access a specific page::
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104
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105 some_repos = user.get_repos().get_page(0)
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106 some_other_repos = user.get_repos().get_page(3)
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107 """
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108
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109 def __init__(self, contentClass, requester, firstUrl, firstParams):
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110 PaginatedListBase.__init__(self)
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111 self.__requester = requester
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112 self.__contentClass = contentClass
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113 self.__firstUrl = firstUrl
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114 self.__firstParams = firstParams or ()
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115 self.__nextUrl = firstUrl
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116 self.__nextParams = firstParams or {}
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117 if self.__requester.per_page != 30:
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118 self.__nextParams["per_page"] = self.__requester.per_page
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119 self._reversed = False
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120 self.__totalCount = None
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121
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122 @property
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123 def totalCount(self):
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124 if not self.__totalCount:
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125 self._grow()
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126
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127 return self.__totalCount
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128
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129 def _getLastPageUrl(self):
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130 headers, data = self.__requester.requestJsonAndCheck(
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131 "GET",
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132 self.__firstUrl,
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133 parameters=self.__nextParams
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134 )
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135 links = self.__parseLinkHeader(headers)
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136 lastUrl = links.get("last")
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137 return lastUrl
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138
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139 @property
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140 def reversed(self):
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141 r = PaginatedList(self.__contentClass, self.__requester, self.__firstUrl, self.__firstParams)
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142 r.__reverse()
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143 return r
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144
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145 def __reverse(self):
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146 self._reversed = True
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147 lastUrl = self._getLastPageUrl()
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148 if lastUrl:
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149 self.__nextUrl = lastUrl
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150
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151 def _couldGrow(self):
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152 return self.__nextUrl is not None
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153
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154 def _fetchNextPage(self):
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155 headers, data = self.__requester.requestJsonAndCheck(
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156 "GET",
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157 self.__nextUrl,
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158 parameters=self.__nextParams
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159 )
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160
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161 self.__nextUrl = None
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162 if len(data) > 0:
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163 links = self.__parseLinkHeader(headers)
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164 if self._reversed:
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165 if "prev" in links:
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166 self.__nextUrl = links["prev"]
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167 elif "next" in links:
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168 self.__nextUrl = links["next"]
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169 self.__nextParams = None
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170
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171 if 'items' in data:
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172 self.__totalCount = data['total_count']
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173 data = data["items"]
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174
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175 content = [
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176 self.__contentClass(self.__requester, headers, element, completed=False)
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177 for element in data if element is not None
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178 ]
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179 if self._reversed:
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180 return content[::-1]
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181 return content
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182
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183 def __parseLinkHeader(self, headers):
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184 links = {}
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185 if "link" in headers:
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186 linkHeaders = headers["link"].split(", ")
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187 for linkHeader in linkHeaders:
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188 (url, rel) = linkHeader.split("; ")
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189 url = url[1:-1]
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190 rel = rel[5:-1]
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191 links[rel] = url
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192 return links
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193
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194 def get_page(self, page):
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195 params = dict(self.__firstParams)
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196 if page != 0:
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197 params["page"] = page + 1
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198 if self.__requester.per_page != 30:
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199 params["per_page"] = self.__requester.per_page
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200 headers, data = self.__requester.requestJsonAndCheck(
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201 "GET",
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202 self.__firstUrl,
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203 parameters=params
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204 )
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205
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206 if 'items' in data:
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207 self.__totalCount = data['total_count']
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208 data = data["items"]
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209
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210 return [
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211 self.__contentClass(self.__requester, headers, element, completed=False)
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212 for element in data
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213 ]