Example of a For loop operation developed by Python

The examples in this article describe the for loop operation of Python development. Share to everyone for your reference, as follows:

Here are some of my study records for your reference:

#基本的for循环语句test_list = [2, "Jone", 3,6,7, ' Hongten ', ' Hanyuan ', ' good ', "Tom"] #打印列表的长度print (len (test_list)) #遍历列表for I in Test_list:print (i) test_str = "Hello,i ' m hongten" print (' Print string: ' + test_str ') #遍历一个字符串print (' Traverse a string ') for I in TEST_STR:PR  int (i) test_tuple = [("A", 1), ("B", 2), ("C", 3), ("D", 4)]print (test_tuple) #遍历一个元组print (' Traversal of a tuple ') for (i,j) in Test_tuple:  Print (i,j) test_dict = {' name ': ' Hongten ', ' age ': ' A ', ' gender ': ' M ', ' Sports ': ' Football, table tennis, swim '} #字典迭代器for key in Test_dict: Print (key + ': ' + test_dict[key]) L1 = [1,3,5,7]L2 = [2,4,6,8] #使用zip将两个列表合并print (Zip (L1,L2)) for (i,j) in Zip (L1,L2): Print (i,j) print (' ####################################################### ') L3 = L2[:]l3.remove (8) Print (' l1,l3 list: ') Print (L1) print (L3) for (i,j) in Zip (L1,L3): Print (I,J) #可以看出来当长度不一的时候, redundant ignored Test_keys = [' name ', ' age ', ' gender ', ' Weight ', ' hight ']test_values = [' Hongten ', ' a ', ' M ', ' a ', ' [+] '] #使用zip来构造一个字典print (' Keys in the Dictionary: ') print (Test_keys) Print (' Key in dictionary ' corresponds to value: ') print (test_values) print (' Construct dictionary ') Test_dic = dict (Zip (test_keys,test_values))) for key in Test_dic:print (key + ': ' + Test_dic[key]) 

Operating effect:

Python 2.7.9 (default, Dec, 12:24:55) [MSC v.1500 + bit (Intel)] on Win32type "copyright", "credits" or "license ( ) "For more information.>>> ================================ RESTART ================================> >> 92jone367hongtenhanyuangoodtom Print string: Hello,i ' m hongten traverse a string hello,i ' m hongten[(' a ', 1), (' B ', 2), (' C ', 3), ('  d ', 4)] traverse a tuple (' a ', 1) (' B ', 2) (' C ', ' 3 ') (' d ', ' 4 ') Gender:mage:20name:hongtensports: Football, table tennis, swimming [(1, 2), (3, 4), "(5, 6)] (7,  2) (3, 4) (5, 6) (7, 8) ###################################################### #L1, the L3 list is: [1, 3, 5, 7][2, 4, 6] (1, 2) (3, 4) (5, 6) Dictionary of keys:[' name ', ' age ', ' gender ', ' weight ', ' hight ' dictionary key corresponding to the value:[' Hongten ', ' a ', ' M ', ' 55 ', ' 170 '] construct the dictionary after gender: Mage:20name:hongtenweight:55hight:170>>>

I hope this article is helpful for Python program design.

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