26 def getline(filename, lineno, module_globals=None):  argument
30     lines = getlines(filename, module_globals)
36 def getlines(filename, module_globals=None):  argument
40     if filename in cache:
41         entry = cache[filename]
43             return cache[filename][2]
46         return updatecache(filename, module_globals)
52 def checkcache(filename=None):  argument
56     if filename is None:
58     elif filename in cache:
59         filenames = [filename]
63     for filename in filenames:
64         entry = cache[filename]
74             cache.pop(filename, None)
77             cache.pop(filename, None)
80 def updatecache(filename, module_globals=None):  argument
85     if filename in cache:
86         if len(cache[filename]) != 1:
87             cache.pop(filename, None)
88     if not filename or (filename.startswith('<') and filename.endswith('>')):
91     fullname = filename
95         basename = filename
99         if lazycache(filename, module_globals):
101                 data = cache[filename][0]()
109                 cache[filename] = (
115                 return cache[filename][2]
119         if os.path.isabs(filename):
143     cache[filename] = size, mtime, lines, fullname
147 def lazycache(filename, module_globals):  argument
160     if filename in cache:
161         if len(cache[filename]) == 1:
165     if not filename or (filename.startswith('<') and filename.endswith('>')):
175             cache[filename] = (get_lines,)