我对Python非常陌生,我只是想了解一些事情。
我得到了一堆要打开的txt文件,其中包含数千个单词,所有单词都用空格分隔,我相信我已经在下面的代码中介绍过了。。但我只是想知道如何将这些行分解为3个块或用户输入的一些int?
来自['perfect', 'dealing', 'crave', 'stirring', 'expedition', 'alexandria', 'vanish', 'dealing', 'crave']
至[['perfect', 'dealing', 'crave'], ['stirring', 'expedition', 'alexandria'],['vanish', 'dealing', 'crave']]
甚至返回到列表形成
a
b
c
TIA-
word_list=[]
filename = "filename.txt"
with open(filename,"r") as file_object:
for line in file_object:
word_list=line.split()
print(word_list)
return(word_list)
使用itertools配方中的grouper
构造:
def grouper(iterable, n, fillvalue=None):
"Collect data into fixed-length chunks or blocks"
# grouper('ABCDEFG', 3, 'x') --> ABC DEF Gxx"
args = [iter(iterable)] * n
return zip_longest(*args, fillvalue=fillvalue)
你的代码是:
word_list = []
n = 3
filename = "filename.txt"
with open(filename, "r") as file_object:
for line in file_object:
word_list.append(grouper(line.split(), n))
return word_list
您可以使用for i in range(0, len(word_list), 3)
在间隔为3的列表上迭代,并使用索引对原始列表进行切片
new_list = [word_list[i:i+3] for i in range(0, len(word_list), 3)]
# [['perfect', 'dealing', 'crave'], ['stirring', 'expedition', 'alexandria'], ['vanish', 'dealing', 'crave']]
您不是在更新word_list
,而是在重写它的值,它应该是这样的。
word_list=[]
filename = "filename.txt"
with open(filename,"r") as file_object:
for line in file_object:
word_list.append(line.split()) # notice this
print(word_list)
return(word_list)
sub_list_size = 3; # take from user input or as needed
output = [word_list[i: i+sub_list_size] for i in range(0, len(word_list), sub_list_size)]
print(output)