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64 lines
1.6 KiB
Python
64 lines
1.6 KiB
Python
# Module 'dump'
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#
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# Print python code that reconstructs a variable.
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# This only works in certain cases.
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#
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# It works fine for:
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# - ints and floats (except NaNs and other weird things)
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# - strings
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# - compounds and lists, provided it works for all their elements
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# - imported modules, provided their name is the module name
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#
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# It works for top-level dictionaries but not for dictionaries
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# contained in other objects (could be made to work with some hassle
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# though).
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#
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# It does not work for functions (all sorts), classes, class objects,
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# windows, files etc.
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#
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# Finally, objects referenced by more than one name or contained in more
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# than one other object lose their sharing property (this is bad for
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# strings used as exception identifiers, for instance).
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# Dump a whole symbol table
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#
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def dumpsymtab(dict):
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for key in dict.keys():
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dumpvar(key, dict[key])
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# Dump a single variable
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#
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def dumpvar(name, x):
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import sys
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t = type(x)
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if t == type({}):
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print name, '= {}'
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for key in x.keys():
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item = x[key]
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if not printable(item):
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print '#',
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print name, '[', `key`, '] =', `item`
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elif t in (type(''), type(0), type(0.0), type([]), type(())):
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if not printable(x):
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print '#',
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print name, '=', `x`
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elif t == type(sys):
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print 'import', name, '#', x
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else:
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print '#', name, '=', x
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# check if a value is printable in a way that can be read back with input()
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#
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def printable(x):
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t = type(x)
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if t in (type(''), type(0), type(0.0)):
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return 1
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if t in (type([]), type(())):
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for item in x:
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if not printable(item):
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return 0
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return 1
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if x == {}:
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return 1
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return 0
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