[英]Using re.sub and replacing string WITH a regular expression using variables in Python
Suppose I have a string 假设我有一个字符串
the_string = "the brown fox"
And I wan't to replace the spaces with a number of characters, for example, 5 dash marks 而且我不想用多个字符替换空格,例如5个破折号
new_string = "the-----brown-----fox"
but this will be a variable, so i cant just do: 但这将是一个变量,所以我不能这样做:
the_string = 'the brown fox'
new_string = re.sub(r'\s', '-----', the_string)
I need something like the following: 我需要以下内容:
the_string = 'the brown fox'
num_dashes = 5
new_string = re.sub(r'\s', r'-{num_dashes}', the_string)
Is something like this possible? 这样的事情可能吗?
Yes, you can do this: 是的,你可以这样做:
the_string = 'the brown fox'
num_dashes = 5
re.sub(r'\s', '-'*num_dashes, the_string)
def repl(matchobj):
if matchobj.group():
#do something
#return whatever you want to replace
my_str = "the brown fox"
pattern = r"\s+"
print re.sub(pattern, repl, my_str)
You can define a function in re.sub
您可以在re.sub
定义一个函数
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