[英]One line for loop to multiple lines python
我無法將一行循環恢復到多行循環。 這是原始代碼:
sequences = [[[item.strip() for item in itemset.split(",")] for itemset in sequence] for sequence in sequences]
我試過多行循環:
for sequence in sequences:
for itemset in sequence:
for item in itemset.split(","):
sequences.append(item.strip())
它不像原來的那樣工作。 任何想法?
您的原始問題會使用相同的數據名稱( sequences
)重新分配結果。 在這里,我將結果分配給變量result
。
鑒於您沒有提供樣本數據,我只是做了一些( sequences
)。
您的原始列表理解是嵌套的(注意括號),每個層創建一個單獨的列表。
[[[x.strip() for x in something] for something in something_else] for something_else in sequences]
。
我通過創建一個包含每個for-loop
的新列表來重新創建該結構,隨着它繼續匹配原始列表理解。
# Sample data.
sequences = [['the, quick, brown fox'], ['jumped, over, the lazy dog']]
# Solution.
result = []
for sequence in sequences:
inner_list = list()
result.append(inner_list)
for itemset in sequence:
inner_list_2 = list()
inner_list.append(inner_list_2)
for item in itemset.split(","):
inner_list_2.append(item.strip())
>>> result
[[['the', 'quick', 'brown fox']], [['jumped', 'over', 'the lazy dog']]]
# Original list comprehension.
>>> [[[item.strip() for item in itemset.split(",")]
for itemset in sequence]
for sequence in sequences]
[[['the', 'quick', 'brown fox']], [['jumped', 'over', 'the lazy dog']]]
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.