lower()|upper()|Traceback|title()|字符串合并|rstrip|lstrip|str()|

 1 print ("hello,world!")
 2 sentence = "yyyy"
 3 print (sentence.lower())
 4 print (sentence.upper())
 5 
 6 #print (sentenc)
 7 
 8 #hello,world!
 9 #yyyy
10 #YYYY
11 #Traceback (most recent call last):
12 #      File "t.py", line 4, in <module>
13 #          print (sentenc)
14 #          NameError: name 'sentenc' is not defined
15 
16 print ('his name is "Li"')
17 
18 #his name is "Li"
19 
20 first = "a    " 
21 first_1 ="a"
22 if first == first_1:
23     print ("fit!") 
24 else: 
25     print ("wrong!")
26 
27 second = "b"
28 print "	ook"+first.rstrip() + "      " +second.title()+"!"
29 
30 #wrong!
31 #        ooka          B!
32 
33 p = (2+3)**3 
34 Q = 0.1 *3
35 print str(p)+""+str(Q)
36 
37 #1250.3