parse9_time.py

l = [100,200,201,202,203,301,303,305,306,401,402,403,405,501,502,601,602,603,701]
"""
下の4つについてtimeitしたけど、どう考えても、
        r,s = s[:9], s[9:]
が早いです。本当にありがとうございました。
2.260901534450575
6.795336202391907
1.9528116482399511
9.414626154138594
"""

from itertools import zip_longest
import timeit

n=1000000

#########################################
# zip_longestっていうのがあった
# [[100, 200, 201, 202, 203, 301, 303, 305, 306], [401, 402, 403, 405, 501, 502, 601, 602, 603], [701, None, None, None, None, None, None, None, None]]
# 惜しい！違う！そうじゃないんだ！Noneいらないから！
x='''
l = [100,200,201,202,203,301,303,305,306,401,402,403,405,501,502,601,602,603,701]
[list(x) for x in zip_longest(*[iter(l)]*9)]
'''
print(timeit.timeit(stmt=x, setup="from itertools import zip_longest", number=n))

#########################################
# 一応できた
# [[100, 200, 201, 202, 203, 301, 303, 305, 306], [401, 402, 403, 405, 501, 502, 601, 602, 603], [701]]
x='''
l = [100,200,201,202,203,301,303,305,306,401,402,403,405,501,502,601,602,603,701]
[list(filter(lambda a: a is not None, x)) for x in zip_longest(*[iter(l)]*9)]
'''
print(timeit.timeit(stmt=x, setup="from itertools import zip_longest", number=n))

#########################################
# こうかなー。
# [[100, 200, 201, 202, 203, 301, 303, 305, 306], [401, 402, 403, 405, 501, 502, 601, 602, 603], [701]]
x = '''
l = [100,200,201,202,203,301,303,305,306,401,402,403,405,501,502,601,602,603,701]
def f(s, l = 9):
    while s:
        r,s = s[:9], s[9:]
        yield r
[x for x in f(l)]
'''
print(timeit.timeit(stmt=x, number=n))
#########################################
# 内包リスト表記は無理やりか
# [[100, 200, 201, 202, 203, 301, 303, 305, 306], [401, 402, 403, 405, 501, 502, 601, 602, 603], [701]]
x='''
l = [100,200,201,202,203,301,303,305,306,401,402,403,405,501,502,601,602,603,701]
def f(s,l = 9):
    s = s.copy() # popするから破壊しないようにする
    while s:
        yield [s.pop(0) for i in range(len(s) if len(s) < l else l)]
[x for x in f(l)]
'''
print(timeit.timeit(stmt=x, number=n))