python - How to find a pair of numbers between parentheses using a regular expression? -

i have following string text / numbers in it. there () 2 numbers in between. these 2 numbers need extracted. string looks this:

s = 'sadfdaf dsf4as d a4d34s ddfd (54.4433,-112.3554) a45 6sd 6f8 asdf' 

i need regular expression solving that. pseudo code this

1. search s ( , check if number next char

2. extract numbers until ,

3. extract second number until )

i found following solution stackoverflow

print re.findall("[-+]?\d+[\.]?\d*[ee]?[-+]?\d*", schooladdressstring)  

which returns: ['4', '4', '34', '54.4433', '-112.3554', '45', '6', '6', '8']

so need have expression consider numbers between () like^( , $(.

how done exactly?

you use regex capture elements between brackets, , parse these using .split(',') , float parse them floats. like:

for match in re.findall(r'(?<=\().*?(?=\))',schooladdressstring):     a,b = map(float,match.split(','))     # , b, example     print([a,b]) 

this prints:

>>> match in re.findall(r'(?<=\().*?(?=\))',schooladdressstring): ...     a,b = map(float,match.split(',')) ...     # , b, example ...     print([a,b]) ...  [54.4433, -112.3554] 

furthermore here parse float. therefore think parsing less error prone: there more patterns can parsed, , parsing done correctly.

the result of map(..) list. in case there can arbitrary number of values between brackets, can use values = map(..) , process elements in values.

float pattern

the pattern float(..) constructor can parse described in the documentation:

sign           ::=  "+" | "-" infinity       ::=  "infinity" | "inf" nan            ::=  "nan" numeric_value  ::=  floatnumber | infinity | nan numeric_string ::=  [sign] numeric_value  floatnumber     ::=  pointfloat | exponentfloat pointfloat      ::=  [digitpart] fraction | digitpart "." exponentfloat   ::=  (digitpart | pointfloat) exponent digitpart       ::=  digit (["_"] digit)* fraction        ::=  "." digitpart exponent        ::=  ("e" | "e") ["+" | "-"] digitpart  digit           ::=  "0"..."9" 

so "added" value of using constructor underscores allowed (to separate groups of digits), , furthermore values infinity, inf , nan allowed.