regex101: PCRE (Legacy) Substitution Workspace

Group 1([\w]+)

Character Class[\w]+

+matches at least one character from the set below:

\wany word character

Character Class[ \t]+

+matches at least one character from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

Character Class[ \t]

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

Group 2(Solver[ \t]*$([\d.]+)[ \t]*,[ \t]*([\d.]+)[ \t]*,[ \t]*([\d.]+)[ \t]*$)

Solverthe literal text Solver (case sensitive)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 3([\d.]+)

Character Class[\d.]+

+matches at least one character from the set below:

\da digit

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

Group 4([\d.]+)

Character Class[\d.]+

+matches at least one character from the set below:

\da digit

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

Group 5([\d.]+)

Character Class[\d.]+

+matches at least one character from the set below:

\da digit

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

\na line-feed (newline) character (ASCII 10)

\r?optionally matches a carriage return (ASCII 13)

demothe literal text demo (case sensitive)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\1the text saved by group 1

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

\1the text saved by group 1

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

\1the text saved by group 1

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

cthe literal c (99₁₀ / 143₈ / 63₁₆) (case sensitive)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Search reference

Regular Expression

([\w]+)[ \t]+=[ \t](Solver[ \t]*\(([\d.]+)[ \t]*,[ \t]*([\d.]+)[ \t]*,[ \t]*([\d.]+)[ \t]*\))\n\r?demo[ \t]*\(\1\.b[ \t]*,[ \t]*\1\.a[ \t]*,[ \t]*\1\.c[ \t]*\)

New

import math

class Solver(object):
   def __init__(self, a, b, c):
       self.a = a
       self.b = b
       self.c = c


def demo(b, a, c):
   d = b ** 2 - 4 * a * c
   if d >= 0:
       disc = math.sqrt(d)
       root1 = (- b + disc) / (2 * a)
       root2 = (- b - disc) / (2 * a)
       print(root1, root2)
       return root1, root2
   else:
       raise Exception


s = Solver(2, 123, 0.025)
demo(s.b, s.a, s.c)

Substitution

$2\.demo()