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Poleta33

[Matplotlib] probleme avec plot_date

Salut tous

bon je me suis lance moi aussi dans le developpement (d'un adesklets)... bref je ne sais pas si sur le forum il traine un guru de matplotlib mais a tout hasard je poste quand meme mon probleme... en fait je n'arrive pas a faire un plot_date et un cursor en meme temps....le plus simple c'est que je donne le code pour tester :

import os,datetime,md5,time
from urllib import urlopen
from matplotlib.dates import DateFormatter, rrulewrapper, RRuleLocator, date2num
from pylab import subplot, plot_date, MONTHLY, title, setp, grid, show, ylabel
from matplotlib.dates import MONDAY
from matplotlib.dates import MonthLocator, WeekdayLocator, DateFormatter
from matplotlib import get_configdir
from matplotlib.widgets import Cursor

configdir = get_configdir()
cachedir = os.path.join(configdir, 'finance.cache')

rule = rrulewrapper(MONTHLY, interval=3)
loc = RRuleLocator(rule)

date3=datetime.datetime.now()
d1 = (date3.month-1, date3.day, date3.year-1)
d2 = (date3.month-1, date3.day, date3.year)

urlFmt = 'http://table.finance.yahoo.com/table.csv?a=%d&b=%d&c=%d&d=%d&e=%d&f=%d&s=%s&y=0&g=d&ignore=.csv'
url =  urlFmt % (d1[0], d1[1], d1[2],d2[0], d2[1], d2[2], 'VK.PA')
cachename = os.path.join(cachedir, md5.md5(url).hexdigest())

if not os.path.isdir(cachedir): os.mkdir(cachedir)
fh = file(cachename, 'w')
fh.write(urlopen(url).read())
fh.close()
fh = file(cachename, 'r')

results = []

lines = fh.readlines()
for line in lines[1:]:

		vals = line.split(',')

		if len(vals)!=7: continue
		datestr = vals[0]
		dt = datetime.date(*time.strptime(datestr, '%Y-%m-%d')[:3])
		d = date2num(dt)
		open, high, low, close =  [float(val) for val in vals[1:5]]
		volume = int(vals[5])
		close_adj = float(vals[6])

		results.append((d, open, close, high, low, volume, close_adj))
results.reverse()

dates = [q[0] for q in results]
closes_adj = [q[6] for q in results]

mondays   = WeekdayLocator(MONDAY)    # every monday
monthsFmt = DateFormatter("%d %b %y")

ax = subplot(111)
plot_date(dates, closes_adj, '-')
cursor = Cursor(ax, color='red', linewidth=2 )

ax.xaxis.set_major_locator(loc)
ax.xaxis.set_major_formatter(monthsFmt)
ax.xaxis.set_minor_locator(mondays)
labels = ax.get_xticklabels()
setp(labels, rotation=45, visible=False)
grid(True)

show()

qui me donne cette erreur :

Traceback (most recent call last):
  File "C:\Python23\work\test7.py", line 56, in ?
    cursor = Cursor(ax, color='red', linewidth=2 )
  File "C:\Python23\Lib\site-packages\matplotlib\widgets.py", line 665, in __ini
t__
    self.linev = ax.axvline(0, visible=False, **lineprops)
  File "C:\Python23\Lib\site-packages\matplotlib\axes.py", line 2061, in axvline

    l, = self.plot([x,x], [ymin,ymax] , transform=trans, scaley=False, **kwargs)

  File "C:\Python23\Lib\site-packages\matplotlib\axes.py", line 2347, in plot
    self.autoscale_view(scalex=scalex, scaley=scaley)
  File "C:\Python23\Lib\site-packages\matplotlib\axes.py", line 1074, in autosca
le_view
    XL = self.xaxis.get_major_locator().autoscale()
  File "C:\Python23\Lib\site-packages\matplotlib\dates.py", line 547, in autosca
le
    dmin, dmax = self.datalim_to_dt()
  File "C:\Python23\Lib\site-packages\matplotlib\dates.py", line 413, in datalim
_to_dt
    return num2date(dmin, self.tz), num2date(dmax, self.tz)
  File "C:\Python23\Lib\site-packages\matplotlib\dates.py", line 215, in num2dat
e
    if not iterable(x): return _from_ordinalf(x, tz)
  File "C:\Python23\Lib\site-packages\matplotlib\dates.py", line 154, in _from_o
rdinalf
    dt = datetime.datetime.fromordinal(ix)
ValueError: ordinal must be >= 1

voila si quelqu'un a eu le meme probleme