python提供三种内置的数据结构：
列表 元组 字典
一.列表(你可以对列表进行查，插，删，改)
#!/usr/bin/python #filename:using_list.py shoplist=[‘apple‘,‘mango‘,‘carrot‘,‘banana‘] print ‘I have‘,len(shoplist),‘items to purchase‘ print ‘These item sare:‘, for item in shoplist: print item,‘\n‘ shoplist.append(‘rice‘) print shoplist shoplist.sort() print ‘\n‘,shoplist print ‘\n‘,shoplist[0] del shoplist[0] print shoplist ~ "using_list.py" 14L, 333C written [[email protected]~]# python using_list.py I have 4 items to purchase These item sare: apple mango carrot banana [‘apple‘, ‘mango‘, ‘carrot‘, ‘banana‘, ‘rice‘] [‘apple‘, ‘banana‘, ‘carrot‘, ‘mango‘, ‘rice‘] apple [‘banana‘, ‘carrot‘, ‘mango‘, ‘rice‘]
二.元组（如同字符串，不可修改）
print ‘%s is %d years old‘%(name,age)
#!/usr/bin/python #filename:print_tuple.py age=22 name=‘Swaroop‘ print ‘%s is %d years old‘%(name,age) print ‘Why is %s playing with that python?‘%name ~ "print_tuple.py" [New] 6L, 152C written [[email protected] ~]# python print_tuple.py Swaroop is 22 years old Why is Swaroop playing with that python?
三.字典
if ‘Guido‘ in ab:
print "%s"% ab[‘Guido‘]
#!/usr/bin/python
#filename:using_dict.py
ab={‘Swaroop‘:‘[email protected]‘,
‘Larry‘:‘[email protected]‘,
‘Matsumoto‘:‘[email protected]‘,
‘Spammer‘:‘[email protected]‘
}
print "Swaroop‘s address is %s ab[‘Swaroop‘]"
ab[‘Guido‘]=‘[email protected]‘
del ab[‘Spammer‘]
print len(ab)
for name,address in ab.items():
print ‘Contact %s at A%s‘%(name,address)
if ‘Guido‘ in ab:
print "\nGuido‘s address is %s"% ab[‘Guido‘]
~
"using_dict.py" [New] 15L, 445C written
[[email protected]~]# python using_dict.py
Swaroop‘s address is %s ab[‘Swaroop‘]
4
Contact Swaroop at [email protected]
Contact Matsumoto at [email protected]
Contact Larry at [email protected]
Contact Guido at [email protected]
Guido‘s address is [email protected]
索引
shoplist[1:3]
shoplist[2:]
shoplist[:]
#!/usr/bin/python #Filename:seq.py shoplist=[‘apple‘,‘mango‘,‘canot‘,‘banana‘] print ‘Item 0 is‘,shoplist[0] print ‘Item 1 is‘,shoplist[1] print ‘Item 2 is‘,shoplist[2] print ‘Item 3 is‘,shoplist[3] print ‘Item -1 is‘,shoplist[-1] print ‘Item -2 is‘,shoplist[-2] print ‘Item 1 to 3 is‘,shoplist[1:3] print ‘Item 2 to end is‘,shoplist[2:] print ‘Item 1 to to -1 is‘,shoplist[1:-1] print ‘Item start to end is‘,shoplist[:] name=‘swaroop‘ print ‘characters 1 to 3 is‘,name[1:3] print ‘characters 2 to end is‘,name[2:] print ‘characters 1 to -1 is‘,name[1:-1] print ‘characters start to end is ‘,name[:] "using_seq.py" [New] 18L, 600C written [[email protected] ~]# python using_seq.py Item 0 is apple Item 1 is mango Item 2 is canot Item 3 is banana Item -1 is banana Item -2 is canot Item 1 to 3 is [‘mango‘, ‘canot‘] Item 2 to end is [‘canot‘, ‘banana‘] Item 1 to to -1 is [‘mango‘, ‘canot‘] Item start to end is [‘apple‘, ‘mango‘, ‘canot‘, ‘banana‘] characters 1 to 3 is wa characters 2 to end is aroop characters 1 to -1 is waroo characters start to end is swaroop
字符串的方法：
if name.startswith(‘Swa‘):
if ‘a‘ in name:
if name.find(‘War‘)!=-1:
delimiter=‘_*_‘
arr=[‘a‘,‘b‘,‘c‘]
delimiter.join(arr)
a_*_b_*_c
#!/usr/bin/python #filename:str_methods.py name=‘Swaroop‘ if name.startswith(‘Swa‘): print ‘Yes,the string start with Swa‘ if ‘a‘ in name: print ‘Yes,it contains the string "a"‘ if name.find(‘war‘)!=-1: print ‘Yes,it contains the string "war"‘ delimiter=‘_*_‘ mylist=[‘Brazil‘,‘Russia‘,‘India‘,‘China‘] print delimiter.join(mylist) ~ ~ "str_methods.py" 12L, 344C written [[email protected] ~]# python str_methods.py Yes,the string start with Swa Yes,it contains the string "a" Yes,it contains the string "war" Brazil_*_Russia_*_India_*_China
时间： 2024-12-28 15:40:41