将两个单独列表中的两个项目链接在一起。python
将两个单独列表中的两个项目链接在一起。python
提问于 2013-04-25 19:15:36
下面我有两个列表，它们是从一个文本文件导入的。我需要一种方法，能够将这些线连接在一起。假设line1是随机打印的，我希望打印line2。
line1 = (file.readline())
line2 = (file.readline())
line3 = (file.readline())
line4 = (file.readline())
line5 = (file.readline())
line6 = (file.readline())
line7 = (file.readline())
line8 = (file.readline())
line9 = (file.readline())
line10 = (file.readline())
line11 = (file.readline())
line12 = (file.readline())
line13 = (file.readline())
line14 = (file.readline())
line15 = (file.readline())
line16 = (file.readline())
line17 = (file.readline())
line18 = (file.readline())
line19 = (file.readline())
line20 = (file.readline())
line21 = (file.readline())
line22 = (file.readline())
line23 = (file.readline())
line24 = (file.readline())
line25 = (file.readline())
line26 = (file.readline())
line27 = (file.readline())
line28 = (file.readline())
line29 = (file.readline())
line30 = (file.readline())
# creates an empty list and fills it with all the definitions from the file
defi = []
defi.append(line2)
defi.append(line4)
defi.append(line6)
defi.append(line8)
defi.append(line10)
defi.append(line12)
defi.append(line14)
defi.append(line16)
defi.append(line18)
defi.append(line20)
defi.append(line22)
defi.append(line24)
defi.append(line26)
defi.append(line28)
defi.append(line30)
randdef = random.choice(defi) #chooses random lines from the list
randdefi = random.choice(defi) # " " " " " "
#creates an empty list and fills it with all the keywords from the file
key = []
key.append(line1)
key.append(line3)
key.append(line5)
key.append(line7)
key.append(line9)
key.append(line11)
key.append(line13)
key.append(line15)
key.append(line17)
key.append(line19)
key.append(line21)
key.append(line23)
key.append(line25)
key.append(line27)
key.append(line29)
randkey = random.choice(key)但我需要将每个列表中的某些行链接在一起。所以它们一起打印
回答 1
Stack Overflow用户
回答已采纳
发布于 2013-04-25 19:17:29
只需将整个文件读取到一个列表中，然后使用切片将其分为两个列表：
with open(filename, 'r') as inputfile:
lines = list(inputfile)
key = lines[::2] # every second line
defi = lines[1::2] # every second line, starting with the second您可以直接从文件中将它们配对，并使用一点itertools魔术：
from itertools import tee, izip
def pairwise(iterable):
"s -> (s0,s1), (s1,s2), (s2, s3), ..."
a, b = tee(iterable)
next(b, None)
return izip(a, b)
with open(filename, 'r') as inputfile:
key_def_pairs = list(pairwise(inputfile))或者直接把它变成一本字典：
with open(filename, 'r') as inputfile:
key_def_pairs = dict(pairwise(inputfile))但您可能需要先删除换行符：
from itertools import imap
with open(filename, 'r') as inputfile:
key_def_pairs = dict(pairwise(imap(str.rstrip, inputfile)))页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/16213281
复制相关文章
相似问题
腾讯云开发者
