正则表达式大于0,小数位为2位

发布时间：2020-12-14 06:30:07 所属栏目：百科来源：网络整理

导读：我需要一个数字值的RegEx,最多两个小数位数大于零,并且在一列中可能没有零.我也应该添加….整数都可以.看到下面的一部分,但可能有前导或尾随的空格 Good values:.10.11.12123.1292092092.13Error values:00.00.00001.234-1-1.2Anything less than zero 这个

我需要一个数字值的RegEx,最多两个小数位数大于零,并且在一列中可能没有零.我也应该添加….整数都可以.看到下面的一部分,但可能有前导或尾随的空格

Good values:
.1
0.1
1.12
123.12
92
092
092.13

Error values:
0
0.0
0.00
00
1.234
-1
-1.2
Anything less than zero

这个怎么样：

^s*(?=.*[1-9])d*(?:.d{1,2})?s*$

说明：

^            # Start of string
s*          # Optional whitespace
(?=.*[1-9])  # Assert that at least one digit > 0 is present in the string
d*          # integer part (optional)
(?:          # decimal part:
 .          # dot
 d{1,2}     # plus one or two decimal digits
)?           # (optional)
s*          # Optional whitespace
$           # End of string

在Python中测试：

>>> import re
>>> test = [".1","0.1","1.12","123.12","92","092","092.13","0","0.0","0.00","00","1.234","-1","-1.2"]
>>> r = re.compile(r"^s*(?=.*[1-9])d*(?:.d{1,2})?s*$")
>>> for item in test:
...     print(item,"matches" if r.match(item) else "doesn't match")
...
.1 matches
0.1 matches
1.12 matches
123.12 matches
92 matches
092 matches
092.13 matches
0 doesn't match
0.0 doesn't match
0.00 doesn't match
00 doesn't match
1.234 doesn't match
-1 doesn't match
-1.2 doesn't match

（编辑：李大同）

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