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PyDictTools.py
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PyDictTools.py
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"""
PyDictTools.py by John Dorsey.
PyDictTools.py contains tools for manipulating dictionaries as needed.
"""
try:
range = xrange
#no NameError yet? we're in python3.
getDictKeys = (lambda inputDict: inputDict.iterkeys())
except NameError:
#we're in python2.
getDictKeys = (lambda inputDict: inputDict.keys())
from warnings import warn
from PyGenTools import makeGen, makeArr
def makeFlatKeySeq(template, sortDictKeys=True):
#flat means nonrescursive.
templateKeySeq = None
if type(template) == dict:
templateKeySeq = sorted(template.keys()) if sortDictKeys else getDictKeys(template)
elif hasattr(template,"__len__"):
templateKeySeq = range(len(template))
else:
raise TypeError("unsupported template type: " + str(type(template)) + ".")
return templateKeySeq
def makeBlankResultFromTemplate(template):
if type(template) == dict:
return {}
elif type(template) == list:
return [None for i in range(len(template))]
else:
raise TypeError("unsupported template type: " + str(type(template)) + ".")
def makeBlankResultAndKeySeqFromTemplate(template,sortDictKeys=True):
return (makeBlankResultFromTemplate(template), makeFlatKeySeq(template, sortDictKeys=sortDictKeys))
def augmentDict(dict0, dict1, recursive=True, recursiveTypes=None):
if tuple in [type(dict0),type(dict1)]:
raise TypeError("Tuple was provided.")
if recursiveTypes == None:
recursiveTypes = [list,dict]
if dict0 == None:
warn("PyDictTools.augmentDict: warning: received None for arg dict0 and will do nothing.")
if dict1 == None:
print("PyDictTools.augmentDict: warning: received None for arg dict1 and will make no changes to dict0.")
return
for key in makeFlatKeySeq(dict1):
if not key in makeFlatKeySeq(dict0):
dict0[key] = dict1[key]
else:
if recursive:
if type(dict0[key]) in recursiveTypes and type(dict1[key]) in recursiveTypes:
if type(dict0[key]) == type(dict1[key]):
augmentDict(dict0[key],dict1[key],recursive=recursive,recursiveTypes=recursiveTypes)
else:
print("PyDictTools.augmentDict: recursive: warning: inputs have a value type mismatch at key " + str(key) + " where recursion would otherwise be possible.")
def cloneDict(inputStructure):
try:
return inputStructure.copy()
except AttributeError:
try:
result, keySeq = makeBlankResultAndKeySeqFromTemplate(inputStructure,sortDictKeys=False)
for key in keySeq:
if type(inputStructure[key]) in [list,dict]:
result[key] = cloneDict(inputStructure[key])
elif type(inputStructure[key]) == str:
result[key] = inputStructure[key]
else:
result[key] = eval(str(inputStructure[key]))
return result
except TypeError:
return eval(str(inputStructure))
def augmentedDict(dict0, dict1, **kwargs):
result = cloneDict(dict0)
augmentDict(result, dict1, **kwargs)
return result
"""
def modifyDict(dict0, dict1):
for key in dict1.keys():
if key in dict0.keys():
dict0[key] = dict1[key]
"""
"""
def modifiedDict(dict0, dict1):
result = {}
for key in dict0.keys():
result[key] = dict0[key]
for key in dict1.keys():
if key in result.keys():
result[key] = dict1[key]
return result
"""
def editDict(inputDict,editFun,recursive=True):
for key in inputDict.keys():
if type(inputDict[key]) == dict and recursive:
editDict(inputDict[key],editFun,recursive=recursive)
inputDict[key] = editFun(inputDict[key])
def replace(inputDict,a,b,recursive=True):
editDict(inputDict,(lambda x: b if x==a else x),recursive=recursive)
def makeFromTemplateAndSeq(template, inputSeq, valueTriggerFun, sortDictKeys=True, recursive=True, recursiveTypes=None):
"""
maybe this should be rewritten as a fancy wrapper for makeFromTemplateAndPathwiseOracle.
"""
if recursiveTypes == None:
recursiveTypes = [list,dict]
inputGen = makeGen(inputSeq)
result, templateKeySeq = makeBlankResultAndKeySeqFromTemplate(template,sortDictKeys=sortDictKeys)
for templateKey in templateKeySeq:
originalValue = template[templateKey]
if valueTriggerFun(originalValue):
if type(originalValue) in recursiveTypes:
raise ValueError("The provided valueTriggerFun returned True when a value of type " + str(type(originalValue)) + " was tested with it. This makes recursion into that value impossible.")
result[templateKey] = next(inputGen)
else:
if recursive and type(originalValue) in recursiveTypes:
result[templateKey] = makeFromTemplateAndSeq(originalValue, inputGen, valueTriggerFun, sortDictKeys=sortDictKeys, recursive=recursive, recursiveTypes=recursiveTypes)
else:
result[templateKey] = originalValue
return result
def makeFromTemplateAndNextFun(template, inputNextFun, valueTriggerFun, sortDictKeys=True, recursive=True, recursiveTypes=None):
if recursiveTypes == None:
recursiveTypes = [list,dict]
inputGen = (inputNextFun() for i in range(2**16))
return makeFromTemplateAndSeq(template, inputGen, valueTriggerFun, sortDictKeys=sortDictKeys, recursive=recursive, recursiveTypes=recursiveTypes)
"""
def makeFromTemplateAndKeywiseOracle(template, keywiseOracleFun, valueTriggerFun, sortDictKeys=True, recursive=True):
result, templateKeySeq = makeBlankResultAndKeySeqFromTemplate(template,sortDictKeys)
for templateKey in templateKeySeq:
originalValue = template[templateKey]
if valueTriggerFun(originalValue):
if type(originalValue) in [list,dict]:
raise ValueError("The provided valueTriggerFun returned True when a value of type " + str(type(originalValue)) + " was tested with it. This makes recursion into that value impossible.")
result[templateKey] = keywiseOracleFun(templateKey, originalValue)
else:
if recursive and type(originalValue) in [list,dict]:
result[templateKey] = makeFromTemplateAndKeywiseOracle(originalValue, keywiseOracleFun, valueTriggerFun, sortDictKeys=sortDictKeys,recursive=recursive)
else:
result[templateKey] = originalValue
return result
"""
def makeFromTemplateAndPathwiseOracle(template, pathwiseOracleFun, valueTriggerFun, path=None, sortDictKeys=True, recursive=True):
if path == None:
path = []
result, templateKeySeq = makeBlankResultAndKeySeqFromTemplate(template,sortDictKeys)
for templateKey in templateKeySeq:
originalValue = template[templateKey]
if valueTriggerFun(originalValue):
if type(originalValue) in [list,dict]:
raise ValueError("The provided valueTriggerFun returned True when a value of type " + str(type(originalValue)) + " was tested with it. This makes recursion into that value impossible.")
result[templateKey] = pathwiseOracleFun(path+[templateKey], originalValue)
else:
if recursive and type(originalValue) in [list,dict]:
result[templateKey] = makeFromTemplateAndPathwiseOracle(originalValue, pathwiseOracleFun, valueTriggerFun, path=(path+[templateKey]), sortDictKeys=sortDictKeys, recursive=recursive)
else:
result[templateKey] = originalValue
return result
def writeFromTemplateAndPathwiseOracle(destination, template, pathwiseOracleFun, valueTriggerFun, path=None, sortDictKeys=True, recursive=True): # -> None:
"""
Recursively explores a destination dictionary and a similarly shaped template dictionary in parallel, and uses the provided valueTriggerFun to identify special values in the template dictionary that should be transformed by the provided pathwiseOracleFun and written into the destination dictionary at the same location as their original location in the template dictionary.
This method is useful for processing complex header data with nested dictionaries and lists, and filling in missing data. Example:
step 1: With a header dictionary like {"pet":{"name":"EMBED"}}, a valueTriggerFun like (lambda val: val in ["EMBED","PROMPT"]) would identify the "name" entry in the "pet" structure as one requiring processing using the pathwiseOracleFun.
step 2: Then a pathwiseOracleFun like (lambda path, val: (dialogueBox.askForDogName() if val == "PROMPT" else database.loadNextDogName() if val == "EMBED" else "TRIGGER_FUN_ERROR") if (path == ["pet","name"]) else val) would pass the value through unmodified if it were found at any location other than the value at the "name" key in a dictionary at the "pet" key in another dictionary, or prompt the user if the original value were "PROMPT", or load a dog name from a database if the original value were "EMBED", or give the value "TRIGGER_FUN_ERROR" if for some reason the pathwiseOracleFun were called in a situation it was unprepared for.
The path kwarg is used for providing the pathwiseOracleFun with the correct dictionary path during recursive calls to writeFromTemplateAndPathwiseOracle.
sortDictKeys controls whether dictionary keys are visited in sorted order, which is important when the pathwiseOracleFun's behavior depends on the order in which it is applied to different things (e.g. it is getting its output values from a buffer).
"""
if path == None:
path = []
templateKeySeq = makeFlatKeySeq(template,sortDictKeys)
destinationKeyArr = makeArr(makeFlatKeySeq(destination,sortDictKeys))
for templateKey in templateKeySeq:
originalValue = template[templateKey]
if valueTriggerFun(originalValue):
if type(originalValue) in [list,dict]:
raise ValueError("The provided valueTriggerFun returned True when a value of type " + str(type(originalValue)) + " was tested with it. This makes recursion into that value impossible.")
newValue = pathwiseOracleFun(path+[templateKey], originalValue)
if not templateKey in destinationKeyArr:
if type(destination) == list:
raise IndexError("Can't augment a list by lengthening it.")
assert type(destination) == dict
destination[templateKey] = newValue
elif newValue != originalValue: #if the pathwiseOracleFun had anything to say at all, this is also cause to write the value to the destination.
destination[templateKey] = newValue
else:
if recursive and type(originalValue) in [list,dict]:
if templateKey in destinationKeyArr:
if type(destination[templateKey]) == type(template[templateKey]):
writeFromTemplateAndPathwiseOracle(destination[templateKey], template[templateKey], pathwiseOracleFun, valueTriggerFun, path=(path+[templateKey]), sortDictKeys=sortDictKeys, recursive=recursive)
else:
pass
def writeFromTemplateAndNextFun(destination, template, inputNextFun, valueTriggerFun, **kwargs):
writeFromTemplateAndPathwiseOracle(destination, template, (lambda ignorePath, ignoreValue: inputNextFun()), valueTriggerFun, **kwargs)
def dictToList(inputDict,extractionFun=None): # -> list:
"""
Returns a list where each value is indexed in the same way that it was keyed in the original dictionary. Dictionary items with keys that aren't integers will not make it into the output.
"""
if extractionFun == None:
extractionFun = (lambda x: x)
errorCount = 0
try:
maxKey = max(inputDict.keys())
minKey = min(key for key in inputDict.keys() if type(key)==int)
except ValueError as ve:
warn("PyDictTools.dictToList: Warning: returning an empty list in order to ignore ValueError: " + str(ve) + ".")
return []
result = [None for i in range(maxKey+1)]
assert len(result) >= maxKey
assert minKey >= 0
for key in inputDict.keys():
if type(key) == int:
if result[key] == None:
result[key] = extractionFun(inputDict[key])
else:
assert False, "duplicate keys???"
else:
errorCount += 1
if errorCount > 0:
print("PyDictTools.dictToList: errorCount was " + str(errorCount) + ".")
return result
assert makeFromTemplateAndSeq([0,0,0,1,0,1,0,1,0,[0,1,1,0],0,1,1],"Hello, world!",lambda x: x==1) == [0, 0, 0, 'H', 0, 'e', 0, 'l', 0, [0, 'l', 'o', 0], 0, ",", " "]