[英]Python list: Extract integers from list of strings
I have a list with the following values, which in fact are strings inside the list:我有一个包含以下值的列表,它们实际上是列表中的字符串:
mylist = ['4, 1, 2', '1, 2', '120, 13', '223, 10']
How can I extract each value and create a new list with every value inside the list above?如何提取每个值并使用上面列表中的每个值创建一个新列表?
I need a result like:我需要这样的结果:
mylist = [4, 1, 2, 1, 2, 120, 13, 223, 10]
Thank you in advance先感谢您
Just use a list comprehension like so:只需像这样使用列表理解:
mylist = ['4, 1, 2', '1, 2', '120, 13', '223, 10']
output = [int(c) for c in ",".join(mylist).split(",")]
print(output)
Output: Output:
[4, 1, 2, 1, 2, 120, 13, 223, 10]
This makes a single string of the values and the separates all of the values into individual strings.这会生成单个值字符串,并将所有值分隔为单独的字符串。 It then can turn them into ints with
int()
and add it to a new list
.然后它可以使用
int()
将它们转换为整数并将其添加到新list
。
I'd offer a solution that is verbose but may be easier to understand我会提供一个冗长但可能更容易理解的解决方案
mylist = ['4, 1, 2', '1, 2', '120, 13', '223, 10', '1', '']
separtedList = []
for element in mylist:
separtedList+=element.split(',')
integerList = []
for element in separtedList:
try:
integerList.append(int(element))
except ValueError:
pass # our string seems not not be an integer, do nothing
mylist = integerList
print(mylist)
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