>>> print ' abc d '.strip().replace(' ','*')
abc*d
x = ''' line one
line two
and line three
'''
>>> print x.replace(' ','*')
***line*one
****line*two
and*line*three****
>&g
给定如下所示的字符串，请通过正则表达式删除所有前导和尾随的标点符号：String a ="!?Don't.;, .:delete !the@ $actual string%";
String b ="Hyphenated-words, too!";我知道正则表达式[ P {Alnum}]会以所有非字母数字字符为目标，但是我怎么只以前导和尾随标点为目标，所以我得到了...a ="Don't dele
