Credit Card Trading System Python

#!/usr/bin/env python#--*--coding:utf-8--*--
function Body of #safe_float
defsafe_float (obj):'safe version of float ()'    Try: retval=float (obj)except(Valueerror,typeerror), Diag:retval=Str (DIAG)returnretvaldefMain ():'handles all the data processing'Log= Open ('Cardlog.txt','W') #记录logTry: Ccfile= Open ('Carddata.txt','R')    exceptIoerror,e:log.write ('no Txns this month\n') Log.close ()returnTxns=ccfile.readlines () ccfile.close () Total= 0.00Log.write ('Account log:\n')     forEachtxninchTxns:result=safe_float (EACHTXN)ifisinstance (result,float): #检查是否为float Total+=result Log.write ('data ... processed\n') #写入Else: Log.write ('ignore:%s'%result)Print '$%s.2f (New Balance)'%(total) log.close ()if __name__=='__main__': Main ()

Credit Card Trading System Python