我们不需要使用regex从字符串中获取数字。
lst = ['25 birds, 1 cat, 4 dogs, 101 ants']
nums = [int(word) for item in lst for word in item.split() if word.isdigit()]
print(nums)
# [25, 1, 4, 101]
无清单理解的等价物:
lst = ['25 birds, 1 cat, 4 dogs, 101 ants']
nums = []
for item in lst:
for word in item.split():
if word.isdigit():
nums.append(int(word))
print(nums)
# [25, 1, 4, 101]
