In [1]:

MATH_CONST_VALUE=(3.1415,2.71828)
MATH_CONST_VALUE[1]=2.7


TypeErrorTraceback (most recent call last)
<ipython-input-1-b2533e01f223> in <module>()
      1 MATH_CONST_VALUE=(3.1415,2.71828)
----> 2 MATH_CONST_VALUE[1]=2.7

TypeError: 'tuple' object does not support item assignment

In [4]:

MATH_CONST_VALUE=([3.1415],[2.71828])
MATH_CONST_VALUE[0][0]=3.14
print MATH_CONST_VALUE

([3.14], [2.71828])

In [5]:

print "AACBBBCAA".replace("BBB","AAA")

AACAAACAA

In [8]:

cmp("beiping","beijing")

Out[8]:

In [9]:

"China Beijing".find("i")

Out[9]:

In [10]:

name="Bill gates"
print name.title()
print name.upper()
print name.lower()

Bill Gates
BILL GATES
bill gates

In [11]:

print "  China,Beijing,Chaoyang  ".strip()
print "  China,Beijing,Chaoyang  ".lstrip()
print "  China,Beijing,Chaoyang  ".rstrip()

China,Beijing,Chaoyang
China,Beijing,Chaoyang  
  China,Beijing,Chaoyang

In [12]:

"  China,Beijing,Chaoyang  ".split(",")

Out[12]:

['  China', 'Beijing', 'Chaoyang  ']

In [13]:

"  China,Beijing,Chaoyang  ".split("i")

Out[13]:

['  Ch', 'na,Be', 'j', 'ng,Chaoyang  ']

In [14]:

mydict={}
k=150717
mydict[`k`]=[99,103,98,102,123,456]
print(mydict[`k`])
k=k+1
print(mydict.get(`k`))
print(mydict[`k`])

[99, 103, 98, 102, 123, 456]
None


KeyErrorTraceback (most recent call last)
<ipython-input-14-97871591f1e0> in <module>()
      5 k=k+1
      6 print(mydict.get(`k`))
----> 7 print(mydict[`k`])

KeyError: '150718'

In [17]:

my_empo_dict={101:['tim','0:444689-202,F:34587349'],102:['Yuri','3424243'],103:['John','0:3243141,H:8925738']}
my_empo_dict[106]=['Mark','3465774']
my_empo_dict.update({107:['Lary','8936274']})
print my_empo_dict
print"Keys:"
print my_empo_dict.keys()
print"Key-Value"
print my_empo_dict.items()

{106: ['Mark', '3465774'], 107: ['Lary', '8936274'], 101: ['tim', '0:444689-202,F:34587349'], 102: ['Yuri', '3424243'], 103: ['John', '0:3243141,H:8925738']}
Keys:
[106, 107, 101, 102, 103]
Key-Value
[(106, ['Mark', '3465774']), (107, ['Lary', '8936274']), (101, ['tim', '0:444689-202,F:34587349']), (102, ['Yuri', '3424243']), (103, ['John', '0:3243141,H:8925738'])]

In [ ]:

S = {123, 'sed', (10, 'cs'), 43}

In [19]:

W = set("apple")
V = set(('dog','cat','tiger','human'))
print W
print V

set(['a', 'p', 'e', 'l'])
set(['tiger', 'dog', 'human', 'cat'])

In [20]:

"BIT" in {123, "BIT", "ok", "test"}

Out[20]:

True

In [21]:

tup = (123,"BIT", "ok", "test", 123)
print set(tup)
newtup = tuple(set(tup)-{"test"})
print newtup

set(['test', 'BIT', 123, 'ok'])
('BIT', 123, 'ok')

In [ ]: