def readDay (file, otherDays=None):
day = Day ()
s = utils.readNextLine (file)
if not s: return None
numMeasurements = int (s.strip())
assert numMeasurements > 0 and numMeasurements < 1000000
while numMeasurements > 0:
fields = file.readline ().strip().split (' ')
assert len (fields) == 2
day.addMeasurement (float (fields [0]), float (fields [1]))
numMeasurements -= 1
#if otherDays was specified, reset the periodZeroUtfSeconds
#we have to wait until we've set up day because it needs
#its julian day to be set
#periodZeroUtfSeconds is for timestamp filtering based on a start-offset from some other
#set of measurements
if otherDays:
otherDay = otherDays.getDay (day)
if (otherDay):
day.periodZeroUtfSeconds = otherDay.measurements [0][0]
day.otherDayWasFound = True
else:
day.otherDayWasFound = True
return day
def readJulianDayLines (file):
"""
return a list of strings, one string per line in the file
where all the strings are on the same julian day as the
first line read. when this returns
the file is at the end or the first line of the
next julian day. and each line in the file starts
with a julian day
:param file:
:return: list of line strings or None if the file had no more lines
"""
def julianDayFromLine (line):
fields = line.strip().split (' ')
assert len (fields) >= 1
julianDate = float (fields [0])
fraction = math.modf (julianDate)
return fraction [1]
#remember where we are in the file
pos = file.tell ()
#get julian day of first line
line = utils.readNextLine (file)
if not line: return None
day = julianDayFromLine (line)
#go back so we can do the iteration
file.seek (pos)
#collect lines into "lines" until the day changes
lines = []
while line and julianDayFromLine (line) == day:
lines.append (line)
pos = file.tell ()
line = utils.readNextLine (file)
#restore file pos to start of new day
file.seek (pos)
return lines
