我正在尝试使用正则表达式捕获字符串中没有整数部分的浮点数。例如:我有字符串:
The dimensions of the object-1 is: 1.4 meters wide, .5 meters long, 5.6 meters high
The dimensions of the object-2 is: .8 meters wide, .11 meters long, 0.6 meters high
我只想捕获没有整数部分的小数,并向它们添加前导零。所以我最终想要的输出是:
The dimensions of the object-1 is: 1.4 meters wide, 0.5 meters long, 5.6 meters high
The dimensions of the object-2 is: 0.8 meters wide, 0.11 meters long, 0.6 meters high
这是我到目前为止尝试过的:
(\d+)?\.(\d+)
此表达式捕获所有小数,例如:
1.4, .5, 5.6, .8, .11, 0.6
但我只需要捕获没有整数部分的小数:
.5, .8, .11
使用负面回顾:
(?<!\d)(\.\d+)
按照您的意愿去做似乎很奇怪。为什么不捕获所有小数并格式化它们?
print(f'{0.185:0.3f}') #0.185
print(f'{.185:0.3f}') #0.185