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@@ -49,8 +49,7 b' class ExtensionManager(Configurable):' | |||||
49 | is added to ``sys.path`` automatically. |
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49 | is added to ``sys.path`` automatically. | |
50 | """ |
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50 | """ | |
51 |
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51 | |||
52 |
shell = Instance('IPython.core.interactiveshell.InteractiveShellABC') |
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52 | shell = Instance('IPython.core.interactiveshell.InteractiveShellABC', allow_none=True) | |
53 | allow_none=True) |
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54 |
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53 | |||
55 | def __init__(self, shell=None, **kwargs): |
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54 | def __init__(self, shell=None, **kwargs): | |
56 | super(ExtensionManager, self).__init__(shell=shell, **kwargs) |
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55 | super(ExtensionManager, self).__init__(shell=shell, **kwargs) |
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