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5
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1 # Module 'dump'
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2 #
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3 # Print python code that reconstructs a variable.
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4 # This only works in certain cases.
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5 #
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6 # It works fine for:
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7 # - ints and floats (except NaNs and other weird things)
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8 # - strings
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9 # - compounds and lists, provided it works for all their elements
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10 # - imported modules, provided their name is the module name
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11 #
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12 # It works for top-level dictionaries but not for dictionaries
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13 # contained in other objects (could be made to work with some hassle
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14 # though).
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15 #
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16 # It does not work for functions (all sorts), classes, class objects,
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17 # windows, files etc.
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18 #
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19 # Finally, objects referenced by more than one name or contained in more
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20 # than one other object lose their sharing property (this is bad for
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21 # strings used as exception identifiers, for instance).
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22
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23 # Dump a whole symbol table
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24 #
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25 def dumpsymtab(dict):
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26 for key in dict.keys():
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27 dumpvar(key, dict[key])
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28
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29 # Dump a single variable
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30 #
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31 def dumpvar(name, x):
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32 import sys
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33 t = type(x)
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559
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34 if t == type({}):
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5
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35 print name, '= {}'
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36 for key in x.keys():
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37 item = x[key]
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38 if not printable(item):
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39 print '#',
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40 print name, '[', `key`, '] =', `item`
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41 elif t in (type(''), type(0), type(0.0), type([]), type(())):
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42 if not printable(x):
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43 print '#',
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44 print name, '=', `x`
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559
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45 elif t == type(sys):
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5
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46 print 'import', name, '#', x
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47 else:
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48 print '#', name, '=', x
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49
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50 # check if a value is printable in a way that can be read back with input()
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51 #
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52 def printable(x):
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53 t = type(x)
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54 if t in (type(''), type(0), type(0.0)):
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55 return 1
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56 if t in (type([]), type(())):
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57 for item in x:
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58 if not printable(item):
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59 return 0
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60 return 1
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559
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61 if x == {}:
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5
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62 return 1
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63 return 0
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