我有如下所示的 CSV 文件，
1994, Category1, Something Happened 1
1994, Category2, Something Happened 2
1995, Category1, Something Happened 3
1996, Category3, Something Happened 4
1998, Category2, Something Happened 5
我想创建两个列表，
Category = [Category1, Category2, Category3]
和
Year = [1994, 1995, 1996, 1998]
我想省略列中的重复项。我正在阅读文件如下，
DataCaptured = csv.reader(DataFile, delimiter=',')
DataCaptured.next()
和循环，
for Column in DataCaptured:
最佳答案
你可以这样做:
DataCaptured = csv.reader(DataFile, delimiter=',', skipinitialspace=True)
Category, Year = [], []
for row in DataCaptured:
if row[0] not in Year:
Year.append(row[0])
if row[1] not in Category:
Category.append(row[1])
print Category, Year
# ['Category1', 'Category2', 'Category3'] ['1994', '1995', '1996', '1998']
如评论中所述，如果顺序无关紧要，使用集合会更容易和更快:
Category, Year = set(), set()
for row in DataCaptured:
Year.add(row[0])
Category.add(row[1])
关于python - 如何使用 CSV 文件的唯一值在 Python 中创建列表？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/24441606/