[英]How to read csv file lines and split elements in line into list of lists?
[英]How to split numbers in a file by lines, and assign the lines into new lists?
如何按行拆分文件中的數字,並將行分配到新列表中?
例如,
(下面的數字在文件中)
2 56 39 4
20 59 30 68 4
28 50 7 68 95 05 68
我想成功
List1=[2, 56, 39, 4]
List2=[20, 59, 30, 68, 4]
List3=[28, 50, 7, 68, 95, 05, 68 ]
這是未經測試的,但您可以執行與以下類似的操作。
list = []
with open(filename, 'r') as f:
for line in f:
list.append(line.split(" ")) # Split the space-delimited line into a list and add the list to our master list
請記住, list
現在是表示每行數字的字符串元素列表的列表。 在訪問這些元素以獲取實際數字時,您必須進行類型轉換(使用類似int(list[list_index][number_index])
)。
嘗試:
result = []
with open(filename) as f:
for line in f:
result.append(map(int, line.strip().split()))
print(result)
Output:
[[2, 56, 39, 4], [20, 59, 30, 68, 4], [28, 50, 7, 68, 95, 5, 68]]
你沒有提到你是否關心輸出仍然是一個字符串,所以這是最容易的IMO:
with open('filename') as file:
lines = [row.split() for row in f.read()]
經測試:
with open('source.txt') as source:
lines = [line.split() for line in source.readlines()]
Output:
[['2', '56', '39', '4'], ['20', '59', '30', '68', '4'], ['28', '50', '7', '68', '95', '05', '68']]
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