Python linecache 模块，_checkcache_ori() 实例源码

def __init__(self):
        codeop.Compile.__init__(self)

        # This is ugly, but it must be done this way to allow multiple
        # simultaneous ipython instances to coexist.  Since Python itself
        # directly accesses the data structures in the linecache module, and
        # the cache therein is global, we must work with that data structure.
        # We must hold a reference to the original checkcache routine and call
        # that in our own check_cache() below, but the special IPython cache
        # must also be shared by all IPython instances.  If we were to hold
        # separate caches (one in each CachingCompiler instance), any call made
        # by Python itself to linecache.checkcache() would obliterate the
        # cached data from the other IPython instances.
        if not hasattr(linecache, '_ipython_cache'):
            linecache._ipython_cache = {}
        if not hasattr(linecache, '_checkcache_ori'):
            linecache._checkcache_ori = linecache.checkcache
        # Now, we must monkeypatch the linecache directly so that parts of the
        # stdlib that call it outside our control go through our codepath
        # (otherwise we'd lose our tracebacks).
        linecache.checkcache = check_linecache_ipython

def __init__(self):
        codeop.Compile.__init__(self)

        # This is ugly, but it must be done this way to allow multiple
        # simultaneous ipython instances to coexist.  Since Python itself
        # directly accesses the data structures in the linecache module, and
        # the cache therein is global, we must work with that data structure.
        # We must hold a reference to the original checkcache routine and call
        # that in our own check_cache() below, but the special IPython cache
        # must also be shared by all IPython instances.  If we were to hold
        # separate caches (one in each CachingCompiler instance), any call made
        # by Python itself to linecache.checkcache() would obliterate the
        # cached data from the other IPython instances.
        if not hasattr(linecache, '_ipython_cache'):
            linecache._ipython_cache = {}
        if not hasattr(linecache, '_checkcache_ori'):
            linecache._checkcache_ori = linecache.checkcache
        # Now, we must monkeypatch the linecache directly so that parts of the
        # stdlib that call it outside our control go through our codepath
        # (otherwise we'd lose our tracebacks).
        linecache.checkcache = check_linecache_ipython

def __init__(self):
        codeop.Compile.__init__(self)

        # This is ugly, but it must be done this way to allow multiple
        # simultaneous ipython instances to coexist.  Since Python itself
        # directly accesses the data structures in the linecache module, and
        # the cache therein is global, we must work with that data structure.
        # We must hold a reference to the original checkcache routine and call
        # that in our own check_cache() below, but the special IPython cache
        # must also be shared by all IPython instances.  If we were to hold
        # separate caches (one in each CachingCompiler instance), any call made
        # by Python itself to linecache.checkcache() would obliterate the
        # cached data from the other IPython instances.
        if not hasattr(linecache, '_ipython_cache'):
            linecache._ipython_cache = {}
        if not hasattr(linecache, '_checkcache_ori'):
            linecache._checkcache_ori = linecache.checkcache
        # Now, we must monkeypatch the linecache directly so that parts of the
        # stdlib that call it outside our control go through our codepath
        # (otherwise we'd lose our tracebacks).
        linecache.checkcache = check_linecache_ipython

def __init__(self):
        codeop.Compile.__init__(self)

        # This is ugly, but it must be done this way to allow multiple
        # simultaneous ipython instances to coexist.  Since Python itself
        # directly accesses the data structures in the linecache module, and
        # the cache therein is global, we must work with that data structure.
        # We must hold a reference to the original checkcache routine and call
        # that in our own check_cache() below, but the special IPython cache
        # must also be shared by all IPython instances.  If we were to hold
        # separate caches (one in each CachingCompiler instance), any call made
        # by Python itself to linecache.checkcache() would obliterate the
        # cached data from the other IPython instances.
        if not hasattr(linecache, '_ipython_cache'):
            linecache._ipython_cache = {}
        if not hasattr(linecache, '_checkcache_ori'):
            linecache._checkcache_ori = linecache.checkcache
        # Now, we must monkeypatch the linecache directly so that parts of the
        # stdlib that call it outside our control go through our codepath
        # (otherwise we'd lose our tracebacks).
        linecache.checkcache = check_linecache_ipython

def __init__(self):
        codeop.Compile.__init__(self)

        # This is ugly, but it must be done this way to allow multiple
        # simultaneous ipython instances to coexist.  Since Python itself
        # directly accesses the data structures in the linecache module, and
        # the cache therein is global, we must work with that data structure.
        # We must hold a reference to the original checkcache routine and call
        # that in our own check_cache() below, but the special IPython cache
        # must also be shared by all IPython instances.  If we were to hold
        # separate caches (one in each CachingCompiler instance), any call made
        # by Python itself to linecache.checkcache() would obliterate the
        # cached data from the other IPython instances.
        if not hasattr(linecache, '_ipython_cache'):
            linecache._ipython_cache = {}
        if not hasattr(linecache, '_checkcache_ori'):
            linecache._checkcache_ori = linecache.checkcache
        # Now, we must monkeypatch the linecache directly so that parts of the
        # stdlib that call it outside our control go through our codepath
        # (otherwise we'd lose our tracebacks).
        linecache.checkcache = check_linecache_ipython

def check_linecache_ipython(*args):
    """Call linecache.checkcache() safely protecting our cached values.
    """
    # First call the orignal checkcache as intended
    linecache._checkcache_ori(*args)
    # Then, update back the cache with our data, so that tracebacks related
    # to our compiled codes can be produced.
    linecache.cache.update(linecache._ipython_cache)

def check_linecache_ipython(*args):
    """Call linecache.checkcache() safely protecting our cached values.
    """
    # First call the orignal checkcache as intended
    linecache._checkcache_ori(*args)
    # Then, update back the cache with our data, so that tracebacks related
    # to our compiled codes can be produced.
    linecache.cache.update(linecache._ipython_cache)

def check_linecache_ipython(*args):
    """Call linecache.checkcache() safely protecting our cached values.
    """
    # First call the orignal checkcache as intended
    linecache._checkcache_ori(*args)
    # Then, update back the cache with our data, so that tracebacks related
    # to our compiled codes can be produced.
    linecache.cache.update(linecache._ipython_cache)

def check_linecache_ipython(*args):
    """Call linecache.checkcache() safely protecting our cached values.
    """
    # First call the orignal checkcache as intended
    linecache._checkcache_ori(*args)
    # Then, update back the cache with our data, so that tracebacks related
    # to our compiled codes can be produced.
    linecache.cache.update(linecache._ipython_cache)

def check_linecache_ipython(*args):
    """Call linecache.checkcache() safely protecting our cached values.
    """
    # First call the orignal checkcache as intended
    linecache._checkcache_ori(*args)
    # Then, update back the cache with our data, so that tracebacks related
    # to our compiled codes can be produced.
    linecache.cache.update(linecache._ipython_cache)