Python Regex that adds space after dot

问题:

How can I use re to write a regex in Python that finds the pattern:

dot "." followed directly by any char [a-zA-Z] (not space or digit)

and then add a space between the dot and the char?

i.e.

str="Thanks.Bob" newsttr="Thanks. Bob" 

Thanks in advance, Zvi

回答1:

re.sub(r'\.([a-zA-Z])', r'. \1', oldstr)

回答2:

re.sub('(?<=\.)(?=[a-zA-Z])', ' ', str) 

回答3:

Try

re.sub(r"\.([a-zA-Z])", ". \\1", "Thanks.Bob") 

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