Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/pip/_internal/req/req_set.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 import logging |
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2 from collections import OrderedDict |
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3 |
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4 from pip._vendor.packaging.utils import canonicalize_name |
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5 |
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6 from pip._internal.exceptions import InstallationError |
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7 from pip._internal.models.wheel import Wheel |
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8 from pip._internal.utils import compatibility_tags |
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9 from pip._internal.utils.typing import MYPY_CHECK_RUNNING |
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10 |
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11 if MYPY_CHECK_RUNNING: |
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12 from typing import Dict, Iterable, List, Optional, Tuple |
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13 |
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14 from pip._internal.req.req_install import InstallRequirement |
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15 |
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16 |
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17 logger = logging.getLogger(__name__) |
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18 |
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19 |
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20 class RequirementSet: |
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21 |
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22 def __init__(self, check_supported_wheels=True): |
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23 # type: (bool) -> None |
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24 """Create a RequirementSet. |
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25 """ |
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26 |
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27 self.requirements = OrderedDict() # type: Dict[str, InstallRequirement] |
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28 self.check_supported_wheels = check_supported_wheels |
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29 |
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30 self.unnamed_requirements = [] # type: List[InstallRequirement] |
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31 |
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32 def __str__(self): |
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33 # type: () -> str |
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34 requirements = sorted( |
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35 (req for req in self.requirements.values() if not req.comes_from), |
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36 key=lambda req: canonicalize_name(req.name), |
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37 ) |
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38 return ' '.join(str(req.req) for req in requirements) |
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39 |
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40 def __repr__(self): |
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41 # type: () -> str |
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42 requirements = sorted( |
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43 self.requirements.values(), |
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44 key=lambda req: canonicalize_name(req.name), |
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45 ) |
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46 |
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47 format_string = '<{classname} object; {count} requirement(s): {reqs}>' |
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48 return format_string.format( |
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49 classname=self.__class__.__name__, |
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50 count=len(requirements), |
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51 reqs=', '.join(str(req.req) for req in requirements), |
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52 ) |
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53 |
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54 def add_unnamed_requirement(self, install_req): |
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55 # type: (InstallRequirement) -> None |
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56 assert not install_req.name |
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57 self.unnamed_requirements.append(install_req) |
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58 |
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59 def add_named_requirement(self, install_req): |
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60 # type: (InstallRequirement) -> None |
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61 assert install_req.name |
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62 |
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63 project_name = canonicalize_name(install_req.name) |
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64 self.requirements[project_name] = install_req |
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65 |
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66 def add_requirement( |
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67 self, |
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68 install_req, # type: InstallRequirement |
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69 parent_req_name=None, # type: Optional[str] |
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70 extras_requested=None # type: Optional[Iterable[str]] |
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71 ): |
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72 # type: (...) -> Tuple[List[InstallRequirement], Optional[InstallRequirement]] |
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73 """Add install_req as a requirement to install. |
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74 |
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75 :param parent_req_name: The name of the requirement that needed this |
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76 added. The name is used because when multiple unnamed requirements |
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77 resolve to the same name, we could otherwise end up with dependency |
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78 links that point outside the Requirements set. parent_req must |
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79 already be added. Note that None implies that this is a user |
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80 supplied requirement, vs an inferred one. |
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81 :param extras_requested: an iterable of extras used to evaluate the |
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82 environment markers. |
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83 :return: Additional requirements to scan. That is either [] if |
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84 the requirement is not applicable, or [install_req] if the |
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85 requirement is applicable and has just been added. |
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86 """ |
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87 # If the markers do not match, ignore this requirement. |
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88 if not install_req.match_markers(extras_requested): |
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89 logger.info( |
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90 "Ignoring %s: markers '%s' don't match your environment", |
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91 install_req.name, install_req.markers, |
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92 ) |
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93 return [], None |
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94 |
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95 # If the wheel is not supported, raise an error. |
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96 # Should check this after filtering out based on environment markers to |
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97 # allow specifying different wheels based on the environment/OS, in a |
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98 # single requirements file. |
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99 if install_req.link and install_req.link.is_wheel: |
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100 wheel = Wheel(install_req.link.filename) |
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101 tags = compatibility_tags.get_supported() |
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102 if (self.check_supported_wheels and not wheel.supported(tags)): |
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103 raise InstallationError( |
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104 "{} is not a supported wheel on this platform.".format( |
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105 wheel.filename) |
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106 ) |
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107 |
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108 # This next bit is really a sanity check. |
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109 assert not install_req.user_supplied or parent_req_name is None, ( |
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110 "a user supplied req shouldn't have a parent" |
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111 ) |
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112 |
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113 # Unnamed requirements are scanned again and the requirement won't be |
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114 # added as a dependency until after scanning. |
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115 if not install_req.name: |
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116 self.add_unnamed_requirement(install_req) |
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117 return [install_req], None |
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118 |
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119 try: |
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120 existing_req = self.get_requirement( |
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121 install_req.name) # type: Optional[InstallRequirement] |
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122 except KeyError: |
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123 existing_req = None |
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124 |
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125 has_conflicting_requirement = ( |
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126 parent_req_name is None and |
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127 existing_req and |
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128 not existing_req.constraint and |
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129 existing_req.extras == install_req.extras and |
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130 existing_req.req.specifier != install_req.req.specifier |
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131 ) |
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132 if has_conflicting_requirement: |
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133 raise InstallationError( |
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134 "Double requirement given: {} (already in {}, name={!r})" |
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135 .format(install_req, existing_req, install_req.name) |
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136 ) |
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137 |
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138 # When no existing requirement exists, add the requirement as a |
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139 # dependency and it will be scanned again after. |
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140 if not existing_req: |
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141 self.add_named_requirement(install_req) |
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142 # We'd want to rescan this requirement later |
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143 return [install_req], install_req |
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144 |
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145 # Assume there's no need to scan, and that we've already |
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146 # encountered this for scanning. |
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147 if install_req.constraint or not existing_req.constraint: |
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148 return [], existing_req |
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149 |
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150 does_not_satisfy_constraint = ( |
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151 install_req.link and |
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152 not ( |
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153 existing_req.link and |
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154 install_req.link.path == existing_req.link.path |
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155 ) |
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156 ) |
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157 if does_not_satisfy_constraint: |
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158 raise InstallationError( |
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159 "Could not satisfy constraints for '{}': " |
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160 "installation from path or url cannot be " |
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161 "constrained to a version".format(install_req.name) |
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162 ) |
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163 # If we're now installing a constraint, mark the existing |
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164 # object for real installation. |
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165 existing_req.constraint = False |
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166 # If we're now installing a user supplied requirement, |
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167 # mark the existing object as such. |
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168 if install_req.user_supplied: |
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169 existing_req.user_supplied = True |
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170 existing_req.extras = tuple(sorted( |
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171 set(existing_req.extras) | set(install_req.extras) |
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172 )) |
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173 logger.debug( |
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174 "Setting %s extras to: %s", |
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175 existing_req, existing_req.extras, |
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176 ) |
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177 # Return the existing requirement for addition to the parent and |
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178 # scanning again. |
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179 return [existing_req], existing_req |
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180 |
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181 def has_requirement(self, name): |
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182 # type: (str) -> bool |
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183 project_name = canonicalize_name(name) |
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184 |
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185 return ( |
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186 project_name in self.requirements and |
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187 not self.requirements[project_name].constraint |
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188 ) |
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189 |
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190 def get_requirement(self, name): |
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191 # type: (str) -> InstallRequirement |
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192 project_name = canonicalize_name(name) |
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193 |
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194 if project_name in self.requirements: |
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195 return self.requirements[project_name] |
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196 |
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197 raise KeyError("No project with the name {name!r}".format(**locals())) |
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198 |
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199 @property |
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200 def all_requirements(self): |
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201 # type: () -> List[InstallRequirement] |
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202 return self.unnamed_requirements + list(self.requirements.values()) |