Created
September 24, 2015 13:22
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Код для модификации исходного кода с помощью redbaron, PyCon Russia 2015
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# -*- coding: utf-8 -*- | |
from redbaron import RedBaron, AssignmentNode, TupleNode | |
def same_source(a, b): | |
""" | |
Фильтр узлов дерева. | |
""" | |
return a.value[0].value == b.value[0].value | |
def compress(assigns): | |
""" | |
Подготовка изменений с учетом констекста. | |
""" | |
v = u'%s = %s' % ( | |
', '.join([n.target.dumps() for n in assigns]), | |
', '.join([n.value.dumps() for n in assigns]) | |
) | |
return v | |
def strip_duplicate_endls(root): | |
""" | |
Убираем лишние переводы строк. | |
""" | |
nl = root.filter(lambda n: n.type == 'endl' and n.next) | |
nl = [ | |
n | |
for n in nl | |
if n.next.type == 'endl' and n in root | |
] | |
for endl in nl: | |
root.remove(endl) | |
def group_assigns(start): | |
""" | |
Схлопываем похожие между собой присвоения. | |
""" | |
if start not in start.parent: | |
return | |
found, node, parent = [], start.next, start.parent | |
while node: | |
if node.type not in ['endl', 'assignment']: | |
break | |
if node.type == 'assignment' and same_source(node, start): | |
found.append(node) | |
node = node.next | |
if found: | |
start.replace(compress([start] + found)) | |
# Удаляем узлы, которые мы "схлопнули" | |
for node in found: | |
if node in parent: | |
parent.remove(node) | |
strip_duplicate_endls(parent) | |
# -------------------------- | |
# "И ещё раз, все вместе..." | |
# -------------------------- | |
with open('sample.py', 'r') as fp: | |
red = RedBaron(fp.read()) | |
assigns = red.find_all( | |
'assign', | |
target=lambda t: len(t) == 1, | |
value=lambda v: len(v) == 2 and v[1].type == 'getitem', | |
) | |
for node in assigns: | |
group_assigns(node) | |
print red.dumps() |
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