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@@ -1,91 +1,105 b'' | |||
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1 | 1 | import io |
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2 | 2 | import json |
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3 | 3 | import os |
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4 | 4 | import sys |
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5 | 5 | |
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6 | 6 | pjoin = os.path.join |
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7 | 7 | |
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8 | 8 | from IPython.utils.path import get_ipython_dir |
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9 | 9 | from IPython.utils.py3compat import PY3 |
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10 | 10 | from IPython.utils.traitlets import HasTraits, List, Unicode |
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11 | 11 | |
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12 | 12 | USER_KERNEL_DIR = pjoin(get_ipython_dir(), 'kernels') |
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13 | 13 | |
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14 | 14 | if os.name == 'nt': |
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15 | 15 | programdata = os.environ.get('PROGRAMDATA', None) |
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16 | 16 | if programdata: |
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17 | 17 | SYSTEM_KERNEL_DIR = pjoin(programdata, 'ipython', 'kernels') |
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18 | 18 | else: # PROGRAMDATA is not defined by default on XP. |
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19 | 19 | SYSTEM_KERNEL_DIR = None |
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20 | 20 | else: |
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21 | 21 | SYSTEM_KERNEL_DIR = "/usr/share/ipython/kernels" |
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22 | 22 | |
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23 | 23 | NATIVE_KERNEL_NAME = 'python3' if PY3 else 'python2' |
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24 | 24 | |
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25 | 25 | class KernelSpec(HasTraits): |
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26 | 26 | argv = List() |
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27 | 27 | display_name = Unicode() |
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28 | 28 | language = Unicode() |
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29 | 29 | codemirror_mode = Unicode() |
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30 | 30 | |
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31 | 31 | resource_dir = Unicode() |
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32 | 32 | |
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33 | 33 | def __init__(self, resource_dir, argv, display_name, language, |
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34 | 34 | codemirror_mode=None): |
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35 | 35 | super(KernelSpec, self).__init__(resource_dir=resource_dir, argv=argv, |
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36 | 36 | display_name=display_name, language=language, |
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37 | 37 | codemirror_mode=codemirror_mode) |
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38 | 38 | if not self.codemirror_mode: |
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39 | 39 | self.codemirror_mode = self.language |
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40 | 40 | |
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41 | 41 | @classmethod |
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42 | 42 | def from_resource_dir(cls, resource_dir): |
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43 | kernel_file = os.path.join(resource_dir, 'kernel.json') | |
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43 | """Create a KernelSpec object by reading kernel.json | |
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44 | ||
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45 | Pass the path to the *directory* containing kernel.json. | |
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46 | """ | |
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47 | kernel_file = pjoin(resource_dir, 'kernel.json') | |
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44 | 48 | with io.open(kernel_file, 'r', encoding='utf-8') as f: |
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45 | 49 | kernel_dict = json.load(f) |
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46 | 50 | return cls(resource_dir=resource_dir, **kernel_dict) |
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47 | 51 | |
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48 | 52 | def _is_kernel_dir(path): |
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53 | """Is ``path`` a kernel directory?""" | |
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49 | 54 | return os.path.isdir(path) and os.path.isfile(pjoin(path, 'kernel.json')) |
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50 | 55 | |
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51 | 56 | def _list_kernels_in(dir): |
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57 | """Ensure dir exists, and return a mapping of kernel names to resource | |
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58 | directories from it. | |
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59 | """ | |
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52 | 60 | if dir is None: |
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53 | 61 | return {} |
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54 | 62 | if not os.path.isdir(dir): |
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55 | 63 | os.makedirs(dir, mode=0o644) |
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56 | 64 | return {f.lower(): pjoin(dir, f) for f in os.listdir(dir) |
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57 | 65 | if _is_kernel_dir(pjoin(dir, f))} |
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58 | 66 | |
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59 | 67 | def _make_native_kernel_dir(): |
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68 | """Makes a kernel directory for the native kernel. | |
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69 | ||
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70 | The native kernel is the kernel using the same Python runtime as this | |
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71 | process. This will put its informatino in the user kernels directory. | |
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72 | """ | |
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60 | 73 | path = pjoin(USER_KERNEL_DIR, NATIVE_KERNEL_NAME) |
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61 | 74 | os.mkdir(path) |
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62 | 75 | with io.open(pjoin(path, 'kernel.json'), 'w', encoding='utf-8') as f: |
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63 | 76 | json.dump({'argv':[NATIVE_KERNEL_NAME, '-c', |
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64 | 77 | 'from IPython.kernel.zmq.kernelapp import main; main()', |
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65 | 78 | '-f', '{connection_file}'], |
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66 | 79 | 'display_name': 'Python 3' if PY3 else 'Python 2', |
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67 | 80 | 'language': 'python', |
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68 | 81 | 'codemirror_mode': {'name': 'python', |
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69 | 82 | 'version': sys.version_info[0]}, |
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70 | 83 | }, |
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71 | 84 | f) |
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72 | 85 | # TODO: Copy icons into directory |
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73 | 86 | return path |
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74 | 87 | |
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75 | 88 | def list_kernel_specs(): |
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76 | """Returns a dict mapping kernels to resource directories.""" | |
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89 | """Returns a dict mapping kernel names to resource directories.""" | |
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77 | 90 | d = _list_kernels_in(SYSTEM_KERNEL_DIR) |
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78 | 91 | d.update(_list_kernels_in(USER_KERNEL_DIR)) |
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79 | 92 | |
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80 | 93 | if NATIVE_KERNEL_NAME not in d: |
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81 | 94 | d[NATIVE_KERNEL_NAME] = _make_native_kernel_dir() |
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82 | 95 | return d |
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96 | # TODO: Caching? | |
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83 | 97 | |
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84 | 98 | def get_kernel_spec(kernel_name): |
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85 | """Returns a KernelSpec instance for the given kernel_name. | |
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99 | """Returns a :class:`KernelSpec` instance for the given kernel_name. | |
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86 | 100 | |
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87 | 101 | Raises KeyError if the given kernel name is not found. |
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88 | 102 | """ |
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89 | 103 | d = list_kernel_specs() |
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90 | 104 | resource_dir = d[kernel_name.lower()] |
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91 | 105 | return KernelSpec.from_resource_dir(resource_dir) No newline at end of file |
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