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annotate lib/python3.8/site-packages/pip/_internal/models/target_python.py @ 0:9e54283cc701 draft

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"planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
author guerler
date Mon, 27 Jul 2020 03:47:31 -0400 (2020-07-27)
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1 import sys
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2
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3 from pip._internal.pep425tags import get_supported, version_info_to_nodot
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4 from pip._internal.utils.misc import normalize_version_info
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5 from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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6
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7 if MYPY_CHECK_RUNNING:
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8 from typing import List, Optional, Tuple
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9
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10 from pip._vendor.packaging.tags import Tag
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11
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12
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13 class TargetPython(object):
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14
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15 """
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16 Encapsulates the properties of a Python interpreter one is targeting
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17 for a package install, download, etc.
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18 """
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19
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20 def __init__(
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21 self,
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22 platform=None, # type: Optional[str]
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23 py_version_info=None, # type: Optional[Tuple[int, ...]]
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24 abi=None, # type: Optional[str]
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25 implementation=None, # type: Optional[str]
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26 ):
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27 # type: (...) -> None
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28 """
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29 :param platform: A string or None. If None, searches for packages
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30 that are supported by the current system. Otherwise, will find
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31 packages that can be built on the platform passed in. These
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32 packages will only be downloaded for distribution: they will
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33 not be built locally.
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34 :param py_version_info: An optional tuple of ints representing the
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35 Python version information to use (e.g. `sys.version_info[:3]`).
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36 This can have length 1, 2, or 3 when provided.
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37 :param abi: A string or None. This is passed to pep425tags.py's
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38 get_supported() function as is.
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39 :param implementation: A string or None. This is passed to
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40 pep425tags.py's get_supported() function as is.
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41 """
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42 # Store the given py_version_info for when we call get_supported().
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43 self._given_py_version_info = py_version_info
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44
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45 if py_version_info is None:
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46 py_version_info = sys.version_info[:3]
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47 else:
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48 py_version_info = normalize_version_info(py_version_info)
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49
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50 py_version = '.'.join(map(str, py_version_info[:2]))
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51
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52 self.abi = abi
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53 self.implementation = implementation
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54 self.platform = platform
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55 self.py_version = py_version
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56 self.py_version_info = py_version_info
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57
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58 # This is used to cache the return value of get_tags().
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59 self._valid_tags = None # type: Optional[List[Tag]]
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60
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61 def format_given(self):
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62 # type: () -> str
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63 """
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64 Format the given, non-None attributes for display.
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65 """
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66 display_version = None
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67 if self._given_py_version_info is not None:
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68 display_version = '.'.join(
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69 str(part) for part in self._given_py_version_info
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70 )
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71
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72 key_values = [
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73 ('platform', self.platform),
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74 ('version_info', display_version),
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75 ('abi', self.abi),
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76 ('implementation', self.implementation),
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77 ]
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78 return ' '.join(
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79 '{}={!r}'.format(key, value) for key, value in key_values
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80 if value is not None
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81 )
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82
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83 def get_tags(self):
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84 # type: () -> List[Tag]
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85 """
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86 Return the supported PEP 425 tags to check wheel candidates against.
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87
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88 The tags are returned in order of preference (most preferred first).
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89 """
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90 if self._valid_tags is None:
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91 # Pass versions=None if no py_version_info was given since
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92 # versions=None uses special default logic.
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93 py_version_info = self._given_py_version_info
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94 if py_version_info is None:
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95 version = None
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96 else:
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97 version = version_info_to_nodot(py_version_info)
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98
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99 tags = get_supported(
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100 version=version,
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101 platform=self.platform,
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102 abi=self.abi,
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103 impl=self.implementation,
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104 )
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105 self._valid_tags = tags
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106
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107 return self._valid_tags