本文整理汇总了Python中pulp.LpProblem.writeMPS方法的典型用法代码示例。如果您正苦于以下问题：Python LpProblem.writeMPS方法的具体用法？Python LpProblem.writeMPS怎么用？Python LpProblem.writeMPS使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类pulp.LpProblem的用法示例。
在下文中一共展示了LpProblem.writeMPS方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: __init__
# 需要导入模块: from pulp import LpProblem [as 别名]
# 或者: from pulp.LpProblem import writeMPS [as 别名]
class LPSolver:
'''
LP solver class
Used for solving LP and MILP problems
'''
def __init__(self,name='analysis',verbose=False):
self.lpProblem = LpProblem()
self.lpVariables = {}
self.lpObjective = {}
self.predictionMap = {}
self.objectiveValue = None
self.rowNames= []
self.columnNames= []
self.configFile = ''
self.statusCode = None
self.verbose = verbose
self.useLimitTag = False
self.mpsLogFile = False
self.ignoreBadReferences = False
self.Mip = True
self.scip_path = ":" + os.environ["HOME"] + "/bin"
def _parseSCIPLog(self, fileName):
'''
Parse result of SCIP analysis.
This section needs a much more solid testing as it key interface with the solver
but often solver errors are dropped when they occur with no / minimal warnings.
@var fileName: name and directory information of file being parsed, usually a temp file
@type fileName: string
@return: (values of fluxes, value of objective function, status of optimization)
@rtype: (dict,float,string)
'''
fileHandle = open(fileName, 'r')
location = 0
line = fileHandle.readline()
while not line.startswith('SCIP Status :'):
if line.startswith('Syntax error'):
print "SCIP parsing syntax error: %s" % line
line = fileHandle.readline()
print line
ilocation = fileHandle.tell()
if location == ilocation:
print "failed to read file %s" %(fileName)
return ({},0.0,"failed to read file")
location = ilocation
line = fileHandle.readline()
m = re.match('[\w\s:]*\[([\w\s]*)\]', line)
statusString = m.group(1)
objectiveValue = None
result = dict()
if statusString == 'optimal solution found':
line = fileHandle.readline()
while not line.startswith('objective value:'):
#Good place to check all the features of the solution.
if line.startswith('solution violates'):
print "Error solving optimization [%s]" % line
ilocation = fileHandle.tell()
if location == ilocation:
print "failed to read file %s" %(fileName)
return ({},0.0,"failed to read file")
line = fileHandle.readline()
m = re.match('objective value:\s+([\S]+)', line)
objectiveValue = float(m.group(1))
line = fileHandle.readline()
while not line.strip() == '':
m = re.match('([\S]+)\s+([\S]+)', line)
name = m.group(1)
result[name] = float(m.group(2))
line = fileHandle.readline()
fileHandle.close()
return (result, objectiveValue, statusString)
def writeMPS(self,fileName):
"""
@param fileName: name of file
@type fileName: String
"""
self.lpProblem.writeMPS(fileName)
return True
def writeLP(self,fileName):
"""
@param fileName: name of file
@type fileName: String
"""
self.lpProblem.writeLP(fileName,writeSOS=0)
#.........这里部分代码省略.........