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# -*- coding: gb2312 -*-
import logging

__version__ = " 1.6 "

def GetKeyPositions (AllEnabled = True):
Ret = []
n = 2
for ix in range ( 1 , 9 * n):
if ix % 2 == 0:
#
# left-top corner line
#
val = ix ** 2 + 1
if AllEnabled: Ret.append (val - ix / 2 )
Ret.append (val)
#
# left-bottom corner line
#
val = (ix + 1 ) ** 2 - ix
if AllEnabled: Ret.append (val - ix / 2 )
Ret.append (val)
# end for


for ix in range ( 1 , 10 * n):
if ix % 2 <> 0:
#
# rith-bottom corner line
#
val = ix ** 2
if AllEnabled and (val > 1 ): Ret.append (val - ix / 2 )
Ret.append (val)
#
# right-top corner line
#
val = (ix + 1 ) ** 2 - ix
if AllEnabled: Ret.append (val - (ix + 1 ) / 2 )
Ret.append (val)
# end for
Ret.sort ()
return Ret
# end def

def CompDiffPrice (ImpPrice, DiffRate, DynPrice):
if (ImpPrice * ( 1 - DiffRate) <= DynPrice) and
(ImpPrice * ( 1 + DiffRate) >= DynPrice):
return True
return False
# end def

def Succeeded (PointsFound):
Count = 0
for ix in range (len (PointsFound)):
if PointsFound[ix]:
Count += 1
# end for
if Count == len (PointsFound):
return True
return False
# end def

def PrintPrices (KeyPos, Prices):
PriceStr = ''
Mark = ' # '
PrevDiff, CurrDiff = 0, 0
for ix in KeyPos:
if ix == KeyPos[len (KeyPos) - 1 ]:
PriceStr = ' %s %s%-8s ' % (PriceStr, Mark, Prices[ix - 1 ])
break

NextPricePos = KeyPos[KeyPos.index (ix) + 1 ]
CurrDiff = int ( 1000 * round (Prices[NextPricePos] - Prices[ix - 1 ], 2 ))
if PrevDiff == CurrDiff:
PriceStr = ' %s%-8s ' % (PriceStr, Prices[ix - 1 ])
continue

PrevDiff = CurrDiff
PriceStr = ' %s %s%-8s ' % (PriceStr, Mark, Prices[ix - 1 ])
# end for
print ' [Prices(%d)] %s ' % (len (KeyPos), PriceStr)
# end def

def IsPosAtMiddlePrice (CurrentPrice, KeyPos, Prices):
Start = KeyPos[ 20 ]
End = KeyPos[ 23 ]
if (CurrentPrice >= Prices[Start]) and (CurrentPrice <= Prices[End]):
return True
return False
# end def

def ScanPrices (CurrPrice, InitVal, ImpPoints, StepBeginVal,
StepEndVal, StepSpinVal = 0.01 , AllPos = True):

if (InitVal < 0) or (StepBeginVal < 0) or
(StepEndVal < 0) or (len (ImpPoints) == 0):
logging.warning ( ' Invalid parameters, pls try again! ' )
return

ValTimes = 1000
stepBegin = int (StepBeginVal * ValTimes)
stepEnd = int (StepEndVal * ValTimes)
stepSpin = int (StepSpinVal * ValTimes)
AllKeyPos = GetKeyPositions ()
ImptKeyPos = GetKeyPositions (False)
PointsCount = len (ImpPoints)
PointsFound = []
for ix in range (PointsCount): PointsFound.append (False)

for OffsetRate in range ( 1 , 50 , 1 ):
for Step in range (stepBegin, stepEnd, stepSpin):
Prices = []
PointsFound = []
for ix in range (PointsCount): PointsFound.append (False)

for ix in range ( 1 , 9 ** 2 * 5 ):
Prices.append (round (InitVal + (ix - 1 ) * Step * 1.0 / ValTimes, 3 ))
# end for

for PntIx in range (PointsCount):
for iy in AllKeyPos:
if ( not PointsFound[PntIx]) and
CompDiffPrice (ImpPoints[PntIx], OffsetRate / 1000.0 , Prices[iy - 1 ]):
PointsFound[PntIx] = True
break
# end for
# end for
if not Succeeded (PointsFound):
continue

if not IsPosAtMiddlePrice (CurrPrice, ImptKeyPos, Prices):
continue

print ' [Params] InitPrice=%.3f, Step=%.3f, OffsetRatio=%.5f '
% (InitVal, Step * 1.0 / ValTimes, OffsetRate / 1000.0 )
print ' [Points] ' , ImpPoints
PrintPrices (ImptKeyPos, Prices)
return
# end for
# end for
# end def


if __name__ == " __main__ " :
"""
Step1. Input the lowest price in its hitory
Step2. In the light of historical prices,
input those trough prices you could see
Step3. Retrieves them
Step4. Copy all of those prices to UltraEdit
Step5. Find out the accurate date by these important key prices
Step6. Draw the horizen-line
"""

while raw_input ( ' Continue? (0: Quit; Enter: go ahead): ' ) <> ' 0 ' :
try :
CurrPrice = input ( ' Current price: ' )
except :
logging.warn ( ' Invalid current price! ' )
continue

try :
InitPrice = input ( ' Historical lowest price: ' )
except :
InitPrice = 0.0
logging.warn ( ' Invalid initial price, default is %.2f ' , InitPrice)

"""
Computing dynamic step length according to the price level
"""
StepBegin = int(CurrPrice / 10 )
if StepBegin == 0:
StepBegin = 0.01
else :
StepBegin = StepBegin * 10 * 0.005
StepEnd = 5.0

try :
ImpPoints = input ( ' A set of important points: ' )
except :
ImpPoints = []
logging.warn ( ' Invalid important points, default is none ' )

ScanPrices (CurrPrice, InitPrice, ImpPoints, StepBegin, StepEnd)


# enf of file

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