从Python中的元组列表中加入元素

Question

我有一个元组列表：

MyList = [('abc', 'def'), ('ghi', 'jkl'), ('mno', 'pqr')]

我想做这样的事情：

s0 = '\n'.join(MyList[0]) # get all tuple elements at index 0
s1 = '\n'.join(MyList[1]) # get all tuple elements at index 1

Answer 1

那是因为你选择的第一个元组不是每个元组的第一个值。

>>> s0 = '\n'.join(l[0] for l in MyList)
>>> s0
'abc\nghi\nmno'

Answer 2

对于列表，您可以尝试以下内容：

MyList = [('abc', 'def'), ('ghi', 'jkl'), ('mno', 'pqr')]

# Need to iterate over the list elements and pick the targeted tuple elem.
s0 = '\n'.join(item[0] for item in MyList) # 'abc\nghi\nmno'
s1 = '\n'.join(item[1] for item in MyList) # 'def\njkl\npqr'

Answer 3

l0 = []
l1 = []
for (v1, v2) in MyList:
    l0.append(v1)
    l1.append(v2)
s0 = '\n'.join(l0)
s1 = '\n'.join(l1)