Python 3 - cumulative functions alternatives -


i wondering if there more pythonic, or alternative, way this. want compare results out of cumulative functions. each functions modifies output of previous , see, after each of functions, effect is. beware in order actual results after running main functions, 1 last function needed calculate something. in code, thing looks (just kind of pseudocode):

for textfile in path:     data = dostuff1(textfile) calculateandprint()  textfile in path:     data = dostuff1(textfile)     data = dostuff2(data ) calculateandprint()  textfile in path:     data = dostuff1(textfile)     data = dostuff2(data )     data = dostuff3(data ) calculateandprint()

as can see, n functions need 1/2(n(n+1)) manually made loops. there, said, more pythonic (for example list functions?) clean code , make shorter , manageable when added more , more functions?

the actual code, documents custom object:

for doc in documents:     doc.list_strippedtext = preparedata(doc.text) bow = createbow(documents)    doc in documents:     doc.list_strippedtext = preparedata(doc.text)     doc.list_strippedtext = preprocess(doc.list_strippedtext) bow = createbow(documents)    doc in documents:     doc.list_strippedtext = preparedata(doc.text)     doc.list_strippedtext = preprocess(doc.list_strippedtext)     doc.list_strippedtext = abbreviations(doc.list_strippedtext) bow = createbow(documents)

while small part, more functions need added.

you define set of chains, applied functools.reduce()

from functools import reduce  chains = (     (dostuff1,),     (dostuff1, dostuff2),     (dostuff1, dostuff2, dostuff3), )  textfile in path:     chain in chains:         data = reduce(lambda data, func: func(data), chain, textfile)         calculateandprint(data)

the reduce() call func3(func2(func1(textfile)) if chain contained 3 functions.

i assumed here wanted apply calculateandprint() per textfile in path after chain of functions has been applied.

each iteration of for chain in chains loop represents 1 of dostuffx loop bodies in original example, loop through for textfile in path once.

you can swap loops; adjusting example:

for chain in chains:     doc in documents:         doc.list_strippedtext = reduce(lambda data, func: func(data), chain, doc.text)     bow = createbow(documents)

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