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GeezerVison is showing github.com — python-patterns/template.py at master · dodo2014/python-patterns Expand file tree/ Copy pathtemplate.pyMore file actions 107 lines (88 loc) · 1.89 KB / Copy pathtemplate.pyFile metadata and controls107 lines (88 loc) · 1.89 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 """http://ginstrom.com/scribbles/2007/10/08/design-patterns-python-style/ An example of the Template pattern in Python""" ingredients = "spam eggs apple" line = '-' * 10 # Skeletons def iter_elements(getter, action): """Template skeleton that iterates items""" for element in getter(): action(element) print(line) def rev_elements(getter, action): """Template skeleton that iterates items in reverse order""" for element in getter()[::-1]: action(element) print(line) # Getters def get_list(): return ingredients.split() def get_lists(): return [list(x) for x in ingredients.split()] # Actions def print_item(item): print(item) def reverse_item(item): print(item[::-1]) # Makes templates def make_template(skeleton, getter, action): """Instantiate a template method with getter and action""" def template(): skeleton(getter, action) return template # Create our template functions templates = [make_template(s, g, a) for g in (get_list, get_lists) for a in (print_item, reverse_item) for s in (iter_elements, rev_elements)] # Execute them for template in templates: template() ### OUTPUT ### # spam # ---------- # eggs # ---------- # apple # ---------- # apple # ---------- # eggs # ---------- # spam # ---------- # maps # ---------- # sgge # ---------- # elppa # ---------- # elppa # ---------- # sgge # ---------- # maps # ---------- # ['s', 'p', 'a', 'm'] # ---------- # ['e', 'g', 'g', 's'] # ---------- # ['a', 'p', 'p', 'l', 'e'] # ---------- # ['a', 'p', 'p', 'l', 'e'] # ---------- # ['e', 'g', 'g', 's'] # ---------- # ['s', 'p', 'a', 'm'] # ---------- # ['m', 'a', 'p', 's'] # ---------- # ['s', 'g', 'g', 'e'] # ---------- # ['e', 'l', 'p', 'p', 'a'] # ---------- # ['e', 'l', 'p', 'p', 'a'] # ---------- # ['s', 'g', 'g', 'e'] # ---------- # ['m', 'a', 'p', 's'] # ---------- |
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