mvoorhie@virgil:~$ python
Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56) 
[GCC 4.4.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> "hello"
'hello'
>>> hello
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'hello' is not defined
>>> 'hello'
'hello'
>>> 'I say "hello"'
'I say "hello"'
>>> """
... this iss
... several
... lines
... """
'\nthis iss\nseveral\nlines\n'
>>> 42
42
>>> 42.2
42.200000000000003
>>> 1+1
2
>>> 1-2                                    
-1
>>> 3*5
15
>>> 5/3
1
>>> 5/3.
1.6666666666666667
>>> 5/float(3)
1.6666666666666667
>>> 2**3
8
>>> 2*3-(3+4)**2
-43
>>> "this is me looking at expresion data"
'this is me looking at expresion data'
>>> # this is a comment
... 
>>> .02*(.03)/330./70.
2.5974025974025973e-08
>>> "%f" % (.02*(.03)/330./70.)
'0.000000'
>>> "%e" % (.02*(.03)/330./70.)
'2.597403e-08'
>>> (.02*(.03)/330./70.)/1e9
2.5974025974025972e-17
>>> (.02*(.03)/330./70.)*1e9
25.974025974025974
>>> b = 5
>>> "%f" % .02*(.03)/330./70.
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: can't multiply sequence by non-int of type 'float'
>>> "%f" % (.02*(.03)/330./70.)
'0.000000'
>>> a = 52
>>> a
52
>>> print a
52
>>> concentration = .02
>>> concentration
0.02
>>> b = concentration
>>> b
0.02
>>> b = "concentration"
>>> b
'concentration'
>>> a = ["this", "is", "a", "list"]
>>> a
['this', 'is', 'a', 'list']
>>> a[0]
'this'
>>> a[1]
'is'
>>> a[-1]
'list'
>>> a[-2]
'a'
>>> a[2] = 37
>>> a
['this', 'is', 37, 'list']
>>> b = a
>>> b
['this', 'is', 37, 'list']
>>> a[2] = "a"
>>> a
['this', 'is', 'a', 'list']
>>> b
['this', 'is', 'a', 'list']
>>> a[1:3]
['is', 'a']
>>> a
['this', 'is', 'a', 'list']
>>> a[1:]
['is', 'a', 'list']
>>> a[:3]
['this', 'is', 'a']
>>> a[:]
['this', 'is', 'a', 'list']
>>> b = a[:]
>>> a
['this', 'is', 'a', 'list']
>>> b
['this', 'is', 'a', 'list']
>>> a[2] = 37
>>> a
['this', 'is', 37, 'list']
>>> b
['this', 'is', 'a', 'list']
>>> 23 + 23
46
>>> a = 3
>>> a += 2
>>> a
5
>>> a *= 2
>>> a
10
>>> a /= 2.
>>> a
5.0
>>> "ATG" + "CAG" + "TGA"
'ATGCAGTGA'
>>> a = "ATG"
>>> a
'ATG'
>>> a += "CAG"
>>> a
'ATGCAG'
>>> int(5/2.)
2
>>> print a
ATGCAG
>>> print a, b
ATGCAG ['this', 'is', 'a', 'list']
>>> a == b
False
>>> a == a
True
>>> a == "ATGCAG"
True
>>> a = True
>>> a
True
>>> a == True
True
>>> a == "True"
False
>>> a == 1
True
>>> a != 1
False
>>> 3 > 5
False
>>> 3 < 5
True
>>> 3 <= 5
True
>>> 3 >= 5
False
>>> a = "Test"
>>> a == "Test"
True
>>> a == "test"
False
>>> a is "Test"
True
>>> a is not "Test"
False
>>> if(a == "Test"):
...     print "it is!"
... else:
...     print "it isn't"
... 
it is!
>>> if(a == "Test"):
...     print "it is!"
...     print "it really really is!"
... else:
...     print "nope"
... 
it is!
it really really is!
>>> a = 4
>>> if(a > 10):
...     print "hi"
... elif(a > 8):
...     print "no"
... elif(a > 6):
...     print "hmmm"
... else:
...     print "default"
... 
default
>>> if(a > 10):
...     print "hi"
... else:
...     if(a > 6):
...             print "hmm"
...     else:
...             print "default"
... 
default
>>> if(a > 10):
...     print "hi"
... else if(a > 3):
  File "<stdin>", line 3
    else if(a > 3):
          ^
SyntaxError: invalid syntax
>>> a = [1,2,3,4,5]
>>> for i in a:
...     print i
... 
1
2
3
4
5
>>> for i in a:
...     print i**2
... 
1
4
9
16
25
>>> b = 0
>>> for i in a:
...     b += i
... 
>>> b
15
>>> b = 0
>>> while (b < 100):
...     b += 3
...     print b
... 
3
6
9
12
15
18
21
24
27
30
33
36
39
42
45
48
51
54
57
60
63
66
69
72
75
78
81
84
87
90
93
96
99
102
>>> while (b < 100):
... 
KeyboardInterrupt
>>> b = 2
>>> while (b < 100):
...     b = b**2
...     print b
... 
4
16
256
>>> while (b > -1):
...     b = b**2
... 
^CTraceback (most recent call last):
  File "<stdin>", line 2, in <module>
KeyboardInterrupt
>>> for i in range(0,103):
...     print i
... 
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
>>> range(0,10)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> range(10)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> range(0,10,3)
[0, 3, 6, 9]
>>> range(10,0,-3)
[10, 7, 4, 1]
>>> for i in xrange(10):
...     print i
... 
0
1
2
3
4
5
6
7
8
9
>>> [2**i for i in range(5)]
[1, 2, 4, 8, 16]
>>> i
4
>>> a = [0,0,0,0,0]
>>> a
[0, 0, 0, 0, 0]
>>> a = [0]*3
>>> a
[0, 0, 0]
>>> sum = __builtin__.sum
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name '__builtin__' is not defined
>>> sum = __builtins__.sum
>>> sum(range(5))
10
>>> import math
>>> math.sqrt(25)
5.0
>>> math.log(8)/math.log(2)
3.0
>>> log2 = math.log(2)
>>> math.log(25)/log2
4.6438561897747244
>>> def mean(x):
...     """Return the mean of a list, x"""
...     s = 0
...     c = 0
...     for i in x:
...             s += i
...             c += 1
... 
>>> def mean(x):
...     s = 0
...     c = 0
...     for i in x:
...             s += i
...             c += 1
...     return s/float(c)
... 
>>> mean(range(10))
4.5
>>>