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r0 d}Y nX |dkrptdkrLt| }nt| }| fdd}tj||t| < W dt j X |S )zGet or create the module lock for a given module name.
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rV c C s> t || }|tjkr2tj| }t|| tj| S t|S dS )zLoad the specified module into sys.modules and return it.
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ModuleSpeca The specification for a module, used for loading.
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loader.
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set, origin will match.
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r r q s zModuleSpec.__init__c C sf dj | jdj | jg}| jd k r4|jdj | j | jd k rP|jdj | j dj | jjdj|S )Nz name={!r}z loader={!r}z origin={!r}z submodule_search_locations={}z{}({})z, ) r+ r rf rr appendru __class__r join)r r4 r
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r c C sR d}t | jdr | jj| }nt | jdr2td|dkrDt| j}t| | |S )z+Create a module based on the provided spec.N
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r r c C s* t | || |dkr t| ||} t| tS )a2 Import and return the module based on its name, the package the call is
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between import_module and __import__. This includes setting __package__ if
the loader did not.
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r c C s |dkrt | }n$|dk r |ni }t|}t | ||}|s|dkrTt | jdd S | s\|S t| t| jdd }tj|jdt|j| S n t||t S dS )a Import a module.
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