Regex in python Find() function

Question

I need to use a regex in the function Find() in Python for example, if I use inside a loop :

arq = open("arquivo.txt","rb")
var = arq.readline()        
a = var.find("abc.*def")

He will be looking at the line "abc something(.*) def" in all lines of the file, beauty

Only now I have two variables containing one string each, I need to call the function Find() with "Var1 . * Var2", i.e., search for Var1 + anything + Var2

Var1 = "abc"
Var2 = "def"
arq = open("arquivo.txt","rb")
var = arq.readline() 

a = var.find(Var1 ".*" Var2) //DESSA FORMA NÃO FUNCIONA

Could someone help me how I can do this kind of search on the line containing regex?

Answer 1

With the function find() I can’t, but here’s what you can do:

import re
var1 = "abc"
var2 = "def"
var = 'abc1dois3quatro5def' # aqui e o conteudo do teu ficheiro, arq.readline() 
match = re.compile('{}(.*?){}'.format(var1, var2)).search(var)
if match is not None:
    print(match.group(1)) # 1dois3quatro5
else:
    print('nada encontrado em {}'.format(var))

DEMONSTRATION

As far as I can tell, you’re using python 2.6, so go like this:

import re
var1 = "abc"
var2 = "def"
var = 'abc1dois3quatro5def'
match = re.compile('%s(.*?)%s' % (var1, var2)).search(var)
if match is not None:
    print match.group(0) # abc1dois3quatro5def
else:
    print 'nada encontrado em ' +var