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Add missing import functools in chapter 7 #14

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Nov 6, 2017
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Add missing import functools in chapter 7 #14

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4 changes: 3 additions & 1 deletion src/7/making_an_n-argument_callable_work_as_a_callable_with_fewer_arguments/example1.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
# Example of using partial() with sorting a list of (x,y) coordinates

import functools

points = [ (1, 2), (3, 4), (5, 6), (7, 7) ]

import math
Expand All @@ -9,5 +11,5 @@ def distance(p1, p2):
return math.hypot(x2 - x1, y2 - y1)

pt = (4,3)
points.sort(key=partial(distance, pt))
points.sort(key=functools.partial(distance, pt))
print(points)
4 changes: 3 additions & 1 deletion src/7/making_an_n-argument_callable_work_as_a_callable_with_fewer_arguments/example2.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
# Using partial to supply extra arguments to a callback function

import functools

def output_result(result, log=None):
if log is not None:
log.debug('Got: %r', result)
Expand All @@ -17,6 +19,6 @@ def add(x, y):
log = logging.getLogger('test')

p = Pool()
p.apply_async(add, (3, 4), callback=partial(output_result, log=log))
p.apply_async(add, (3, 4), callback=functools.partial(output_result, log=log))
p.close()
p.join()