擅长:python、mysql、java
<pre><code>import fileinput
import re
myfile = open("inputRegex.txt", "r")
def changePrecision(matchObj):
return str(round(float(matchObj.group(0).replace(" ","")),4))
for line in myfile:
newLine = re.sub(r"[+-]? *(?:\d+(?:\.\d*)?|\.\d+)(?:[eE][+-]?\d+)?", changePrecision, line)
print newLine
</code></pre>
<p>我希望这就是你要找的</p>