我想将元组中的值移动到列表中

Question

rows = [(747652126187978752, 'NULL', 'NULL', 'NULL', '2020-11-03 18:46:57')]
alr_exist2 = []
ex = 0
for row in rows :
            ex = row
            alr_exist2.append(ex[0])
            ex = 0
print(alr_exist2)

如果我运行上述代码，我需要以下输出：

[747652126187978752, 'NULL', 'NULL', 'NULL', '2020-11-03 18:46:57']

我如何修复错误

Answer 1

您只需将其展平：

alr_exist2 = [item for sublist in rows for item in sublist]

输出：

[747652126187978752, 'NULL', 'NULL', 'NULL', '2020-11-03 18:46:57']