def getEdgeList(fileName):
'''
Function that gets the edge list and defines edge connectivity and returns it as a list.
'''
## TODO: Extend the SNCF with data also returns the edge list.
edgeList=[]
basName=os.path.basename(fileName)
extName=basName.split('.')
if extName[1]=='sncf' or extName=='SNCF':
try:
fileHandler=open(fileName)
allLines=fileHandler.readlines()
numLines=sncfheaders.countLines(fileName)
strtNum=filesanity.findHeader('@start_elist_(edgName,frmId,toId)',fileName)
endNum=filesanity.findHeader('@end_elist',fileName)
# The reason why the interpreter prints the '@end_elist' line is because,
# there is a \n character (new line) in the end.
# So, endNum-1 should do the trick.
for itr in range (strtNum,endNum-1):
if allLines[itr]=='\n':
sncfheaders.readIgnore()
else:
edgeList.append(allLines[itr])
return edgeList
except IOError,WindowsError:
print 'Error. Filename %s does not exist. Please check the name of the file and try again.' %(fileName)
def betweenHeaders(startHeaderName,endHeaderName,fileName):
'''
Returns the lines in between start and end header(s).
'''
fileHandler=open(fileName)
allLines=fileHandler.readlines()
# Count the number of lines in the file
noLines=sncfheaders.countLines(fileName)
# Computer the indices of the search-terms.
sInd=filesanity.findHeader(startHeaderName,fileName)
eInd=filesanity.findHeader(endHeaderName,fileName)
# print sInd,eInd Uncomment for diagnostics
# Initiate linebuffer
lineBuff=[]
# Loop through the lines and store the contents in the buffer.
for itr in range(sInd,eInd-1):
if allLines[itr]=='\n':
sncfheaders.readIgnore()
else:
lineBuff.append(allLines[itr])
return lineBuff
def getPPath (macroCode):
'''
Function that fetches the relative path for a given macrocode.
'''
fullPath=None
try:
fileHandler = open ('envdetails.edf')
allLines = fileHandler.readlines()
nLines = sncfheaders.countLines ('envdetails.edf')
for itr in range(0,nLines):
if allLines [itr].split(',')[0] == macroCode:
fullPath = allLines [itr].split(',')[1].split('\n')[0]
break
else:
pass
fullPath=None
# Error: Return None when error arises.
except:
print'''
[getPPath says]: Could not locate the file \"envdetails.edf\". Check for the existence of the file and try again.
'''
return fullPath
def getCoordinates (fileName):
'''
Function that writes the co-ordinate date to a write buffer.
'''
basName = os.path.basename (fileName)
extName = basName.split ('.')
retCoords = []
if extName [1] == 'sncf' or extName == 'SNCF':
try:
fileHandler=open(fileName)
allLines=fileHandler.readlines()
numLines = sncfheaders.countLines(fileName)
strtNum = filesanity.findHeader('@start_coord_node_id_(x,y)',fileName)# Returns the <line_number+1>
endNum = filesanity.findHeader('@end_coord',fileName)
# The reason why the interpreter prints the '@end_sncf' line is because, there is a \n character (new line) in the end.
# So, endNum-1 should do the trick.
for itr in range (strtNum,endNum-1):
if allLines [itr] == '\n':
sncfheaders.readIgnore()
else:
retCoords.append(allLines[itr])
return retCoords
except IOError,WindowsError:
print 'Error. Filename %s does not exist. Please check the name of the file and try again.'%(fileName)