[英]How to sort a list of strings in Python
In Python
I have a list of str
with this notation:在
Python
中,我有一个带有以下符号的str
列表:
MyList = ['1:10', '5:2', '10:7', ...]
Where the characters before the :
stand for the line number and the characters after it are the column number.其中
:
前面的字符代表行号,后面的字符是列号。
I would like to know if it is possible to sort the list like this:我想知道是否可以像这样对列表进行排序:
MyList = ['1:1', '1:2', '1:3', ..., '2:1', '2:2', '2:3', ...]
Sure.当然。 Using the
key=
argument to sorted
(or list.sort()
), we can define a function that splits each item by colon(s) and casts the parts to integers.使用
sorted
的key=
参数(或list.sort()
),我们可以定义一个函数,用冒号分割每个项目并将部分转换为整数。 After that, Python's natural sorting does the rest of the work.之后,Python 的自然排序会完成剩下的工作。 (Iterables such as lists are compared item-wise, and integers are compared as you would expect integers to be compared.)
(诸如列表之类的可迭代对象是逐项比较的,而整数则按照您期望的整数进行比较。)
>>> MyList = ['5:2', '1:10', '93:881', '93:8', '4:8', '10:7']
>>> sorted(MyList, key=lambda item: [int(part) for part in item.split(":")])
['1:10', '4:8', '5:2', '10:7', '93:8', '93:881']
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