# Jean-Baptiste Juin
# Astronomy Python course
# Practice 1

#------------------------
#------------------------
# Title: ipython basics
#------------------------
#------------------------

#------------------------
# Calculator
#------------------------
# Float/Int distinction
3/2
3./2.
# Recall preceding result
_*2.

#------------------------
# Strings manipulation
#------------------------
s1='Hello'
s2='world'
s=s1+" "+s2
print s
print (s1+'-'+s2+' ')*3
# Accessing string
s[0]
s[-1]
# Slicing
s[0:5]
# String are objects: some methods
s.title()
s.lower()
s.upper()
ls=s.split()
# Counting elements
s.count('o')
print ls

#------------------------
# Lists (and tuples)
#------------------------
ls[0]
ls[1]
print ls
# length of a list
len(ls)
# adding an element to a list
ls.append(5.0)
ls.append(5.0)
print ls
len(ls)
# counting elements
ls.count(5.0)
# removing element
ls.remove('world')
# inserting element
ls.insert(1,'world')
# loop in a list
for element in ls:
	print element
	
	
# Declare a new list:
ls2=['Hola','Mundo',57,-2.5]
# Concatenation of lists
ls3=ls+ls2
# list of lists
lsc=[ls,ls2,[3.1,4.2,-5.3]]


#------------------------
# Dictionnaries
#------------------------
# Declaring a dictionnary
d={}
# Adding elements
d['Name']='ABELL3667'
d['RA']=[20,26,21.4]
d['DEC']=[-56,48,60.0]
d['LX']=[9.15]
print d
# Iterating in elements
for k in d.keys():
	print k,d[k]
	
	
# Getting the list of the values or keys
d.keys()
d.values()

#------------------------
# ASCII i/o
#------------------------
# Output
f=open("./output.txt",'w')
for k in d.keys()
	f.write(k+": "+str(d[k])+"\n")
	
	
f.close()
# Input
f=open("./Practice1.txt",'r')
Values=[]
for line in f:
	l=line.split()
	for i in xrange(len(l)):
		l[i]=float(l[i])
	Values.append(l)
f.close()
print Values

#------------------------
# Pickle
#------------------------
# Pickle ~ equivalent a save/load de IDL
# Pickle module esta en ipython si no:
#import pickle
# Writing
f=open("./test.pickle","w")
pickle.dump(Values,f)
f.close
# Reading
f=open("./test.pickle","r")
Result=pickle.load(f)
f.close()
print Result

#------------------------
# Date/Time
#------------------------
import time
print time.localtime()
print time.ctime()
import datetime
hoy=datetime.date(2007,8,14)
man=datetime.date(2007,9,15)
delay=hoy-man
print delay
delay
delay2=datetime.timedelta(18)
print hoy+delay2
hoy.weekday()
hoy.month

#------------------------
# iPython Magic functions
#------------------------
%hist
# To save some commands
%save "./commands.txt" 10 12-15
# To log input-output
%logstart -t -o
%logoff
# To know defined variables
%who
%whos