This worksheet parses the login data to find the number of simultaneous worksheets and plot the results.
# Get login data from the "last" program
from subprocess import Popen, PIPE
p = Popen("last", stdout=PIPE,shell=True)
output = p.communicate()[0]
from datetime import datetime, timedelta
# define an "interesting" user name
# this definition gets any users with the same name
# as the currently executing worksheet user.
def interesting_user(s):
return s[:8]==os.environ['USER'][:8]
# parse the data
print "Interesting user: ",os.environ['USER'][:8]
data=[]
i=0
for line in output.split('\n'):
i+=1
tokens=line.split()
if len(tokens)==0 or not interesting_user(tokens[0]):
continue
d=dict(user=tokens[0])
d['action']='log in'
d['time']=datetime.strptime('%s %s 2011 %s'%(tokens[4],tokens[5],tokens[6]), '%b %d %Y %H:%M')
logindate=d['time']
d['log id']=i
data.append(d)
if tokens[7]=='-':
d=dict(user=tokens[0])
d['action']='log out'
try:
d['time']=datetime.strptime('%s %s 2011 %s'%(tokens[4],tokens[5],tokens[8]), '%b %d %Y %H:%M')
if d['time']<logindate:
d['time']+=timedelta(1r) # add one day
except ValueError:
continue
d['log id']=i
data.append(d)
# sort the data by time
data.sort(key=lambda x: x['time'])
# now create two corresponding lists of dates and number of logged in users
logged_in=0
starting_date=data[0]['time']
dates=[]
users=[]
for d in data:
if d['action']=='log in':
logged_in+=1
elif d['action']=='log out':
logged_in-=1
dates.append(d['time'])
users.append(logged_in)
Interesting user: sagenbws Interesting user: sagenbws |
# here is a static graph
import matplotlib
from pylab import figure, savefig
fig = figure(figsize=[15,5])
ax = fig.add_subplot(111)
ax.plot_date(dates, users, '-',drawstyle='steps')
ax.grid(True)
fig.autofmt_xdate()
savefig('test.png',bbox_inches='tight')
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# now plot using matplotlib
import matplotlib
from pylab import figure, savefig
@interact
def _(view=range_slider(0,len(dates),1,default=(0,len(dates)))):
fig = figure(figsize=[15,5])
ax = fig.add_subplot(111)
ax.plot_date(dates[view[0]:view[1]], users[view[0]:view[1]], '-',drawstyle='steps')
ax.grid(True)
fig.autofmt_xdate()
savefig('test.png',bbox_inches='tight')
Click to the left again to hide and once more to show the dynamic interactive window |
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