regex - Python & regular expressions -

-

Hi I am creating a program that is ! Math (5 + 5) Get more results from Skype, I'm having trouble getting the Résx expression correct, I'm reading docs and I can not get right now

I I'm trying to support operators, so , * /, +, -,%, and ** trouble occurs when I try to use **, either I I use a regex and lose exponent options or get exponent option is.

Here's my expression: 

  Expr = re.search (r '((\ d +) (\ s *.?. *. * \ **) (\ D +), 'Mathematics (500 ** 1000)')

And then I am parse it using the group, 

  Build_expr = {'number1': int (expr.group (2)), 'operator': expr.group (3), 'number2': int (XPRGP (4))}

Results of logging leakage modules with exponents: 

  & gt; & Gt; & Gt; Expr.group () '500 ** 1000' & gt; & Gt; & Gt; Expr.group (1) '500 ** 1000' & gt; & Gt; & Gt; Expr.group (2) '500' & gt; & Gt; & Gt;  Mathematics (500 + 1000)      / P> 
  & Gt; & Gt; & Gt; Expr.group (1) '500 + 1000' & gt; & Gt; & Gt; Expr.group (2) '500' & gt; & Gt; & Gt; Expr.group (3) '+' & gt; & Gt; & Gt; Expr.group (4) '1000'  
 
 Here is the whole function 
 
  def math_func (expr_arg): expr = re.search ('r' (( \ D +) (\ s *.? ... * \ **) (, \ d +)), expr_arg #parse_expr = '' .join (expr.group ()). Split () build_expr = {'number1': Int (expr.group (2)), 'operator': expr.group (3), 'number2': int (expr.group (4))} if build_expr ['operator' ']': Operation = Build_expr ['number1'] + build_expr ['number2'] Return str (operation) aliff build_xp ['operator'] == '-': operation = build_xprro [[number1 '] - Operation = build_xprro [[number1]] / build_exprar ['no2'] Return str (Operation) ['Number 2'] Return Str (Operation) Alief Build_Exper ['Operator'] == '/' ) Alief Build_XP ['Operator'] == '%': Operation = Build_ Expression ['Number1']% build_expr ['number2'] Return Str (Operation) Alief Build_Express ['Operator'] == '*': Operation = Build_XP ['Number1'] * Build_XP Return Str (Operation) Alif Return_express ['operator'] == '**': Operation = build_xpr ['no1'] ** build_xp ['no2'] return str (operation) Other: return 'invalid operator' return 'all good son' F = math_func ('Mathematics (500 + 1000)' keeps silent) Message. Chat Message message ('> & gt;' + F)   
 
 
 can be matched using Is:  
  (\ d +) \ s * ([- + * /%] +) \ s * (\ d +)  
 
 breakdown 
 
     
  •   will match one or more digits 
    •  
  •   \ s *  will match white space, if any < 
    •  
  •   ([- + * /%] +)  will match one or more  operator  characters 
    •

Comments

Post a Comment

Popular posts from this blog

import - Python ImportError: No module named wmi -

-
I followed the instructions for downloading WMI for Python When I try to run the code for C.Win32_Service (StartMode = "Auto", state = "Stopped") import wmi c = wmi.WMI (): if Raw_input ("restart% s?"% S.Caption) .upper () == "Y": s.StartService () I got the error traceback (most recent call end): file ". \", Line 1, edit: I am using Python 2.7.6 EDIT2: I am running 64-bit Windows 2008 R2, and I've downloaded WMI-1.4.9.zip (md5). I removed the content and put it in D: Python \ Tools \ Scripts I executed dragon setup.py.install I said D : \ Python \ tools \ scripts to% PATH% and when I execute the code for C.Win32_Service (StartMode = "Auto", state = "Stopped") import wmi c = Wmi.WMI (): If raw_input ("Restart% s?"% S. Caption). () == "Y": s.StartService () error me Gets traceback (most recent call final): File ". See \", line 1, & lt; Modu...
Read more

Editing Python Class in Shell and SQLAlchemy -

-
I am working on the terminal on a shell script after this tutorial SQLAlchemy tutorial. I need to type gt; & Gt; & Gt; Sqlalchemy import column, integer, string & gt; & Gt; & Gt; Class user (base): __tablename__ = 'users' id = column (integer, primary_key = true) name = column (string) absolute name = column (string) password = column (string) def __repr __ (self): return "& lt ; User (name = '% s', absolute name = '% s', password = '% s') & gt; "% (Self.name, self.fullname, self.password) After the problem I have typed the password = column (string) I hit twice and changed .... >> I then took everything back but then an error was thrown because the class already exists ... I am not completely sure how to fix it. How do I open that slip in the shell script and edit it (Add DF to DRR) The error thrown below: / user / giripeters / TFSQLLX / Lib / python2.7 / site-packages / sqlalchemy / ext / decla...
Read more

lua - HowTo create a fuel bar -

-
I would like to create a fuel bar (empty with full tank). When the user touches the screen, the fuel once Dairejh these is my code: lifeBar = display.newImage ( "fuel_bar1.png") lifeBar.anchorX = 0 lifeboats. ======================== Lifetime Y = 37 screens Group: The Insert function (called Laifbar) However, I fuel Kansmoshn (equivalent to "pressed" variable to reduce the fuel tank "true") Have used. When pressed == is true, it means that the user is touching the screen: processed (fuel) processed () if life & gt; 0 and pressed == true remains = life - life 1 Life = life =. Wide-1 remains Value.text = string.format ("% d", life) End of this This function is active as the entrance event: runtime: addEventListener ( "Antrfrem" fuel Snsadna) it is very well, but my question is: pressed variable each time 5 seconds (once = = True) How is it possible to reduce the vitality width? I tried to add it to my touch even...
Read more