Iron Music study python_day09_ Homework

Exercises

1, sorting function related knowledge points, writing blog2, write functions, check for the elements corresponding to all the odd-bit indexes of the incoming list or tuple object, and return them as new lists to the caller.defOdd_index (l): Lis=[] forIinch Range(Len(l)):# setting an index range by range is better than finding an index through an element because the index value returned by the same element is incorrect        ifI% 2 != 0: Lis.append (L[i])returnLis# Verify that the use of the Odd_index function is normal:Li=[I forIinch Range( -)]Print(LI)Print(Odd_index (LI)) tuple1=(' A ',' B ',' C ',' B ',' C ',' d ',' E ',' F ',' G ')Print(Odd_index (Tuple1)) [0,1,2,3,4,5,6,7,8,9,Ten, One, A, -, -, the, -, -, -, +][1,3,5,7,9, One, -, the, -, +][' B ',' B ',' d ',' F ']# It's easier to use slices# def Odd_index (argv):# return Argv[1::2]3and write functions to determine whether the length of the object passed in by the user (string, list, tuple) is greater than5。defLen_5 (L):return Len(l)> 54, write the function, check the length of the incoming list, if it is greater than2, only the first two-length content is retained and the new content is returned to the caller.defLen_2 (L):if Len(l)> 2:# satisfies the condition to return the content, does not satisfy the words to do nothing, namely none        returnl[:2]lis=[1,2]Print(Len_2 (LIS)) Lis2=[1,2,3,4]Print(Len_2 (LIS2))None[1,2]5, write the function, calculate the number of "number", "Letter", "Space", and "other" in the incoming string, and return the result.defCount_n (s): num= 0Alpha= 0Blank= 0Other= 0     forIinchSifI.isdigit (): num+= 1        elifI.isalpha (): Alpha+= 1        elifI== "': Blank+= 1        Else: Other+= 1Result= ' Total number {}, letter {}, Space {}, other {} '.format(Num,alpha,blank,other)return(Result)# ValidationPrint(Count_n (' uy143 oifg87 90/+ ')) Total number7A, letter6A, space6One, other2A6, write functions, check whether each element of a user's incoming object (string, list, tuple) contains empty content2, and returns the result.defBLANK_EX (l): Li=[] forIinchLif "' inch Str(i): Li.append (i)returnLi#验证S= ' Yiu dGH 'Li1=[' 34s ', $,' et ']tuple1=(' r t ', +, [ ])Print(BLANK_EX (s))Print(BLANK_EX (LI1))Print(BLANK_EX (Tuple1))7, write the function, check the length of each value passed in the dictionary, if it is greater than2, only the first two-length content is retained and the new content is returned to the caller. Dic={"K1":"V1v1","K2": [ One, A, -, -]} PS: value in the dictionary can only be a string or listdefDIC_EX (d): forIinchD:# by key to find the corresponding value, can be directly re-assignment        if Len(D[i])> 2: D[i]=d[i][:2]returnD# ValidationDic={"K1":"V1v1","K2": [ One, A, -, -],}Print(DIC_EX (DIC)) {' K1 ':' v1 ',' K2 ': [ One, A]}8, write a function, receive two numeric parameters, return the larger number.defMax_min (A, B):returnAifA>BElseB9, write the function, the user passes in the modified file name, with the content to modify, executes the function, completes the entire file the batch modification operation (advanced).Ten, write a function to complete three landing functions, and then write a function to complete the registration function (Advanced)# define Registration functionsdefRegister*Args**Kwargs): while True: username= input(' Please enter your username (q/q back to home page): '). Strip ()ifUsername.upper ()== ' Q ':# Exit Function            return         with Open(' Reg.txt ', encoding=' Utf-8 ') asF1: forIinchF1:user=I.strip (). Split ()ifUsername==user[0]orUsername== "':Print(' There is a user name, please re-register: ') Break            # An append-write operation is determined after the For loop has finished reading the entire file without a user of the same name            Else: Password= input(' Please enter your password: '). Strip ()# Extended a feature with a password that cannot be empty and less than 6 digits                ifPassword=="' or Len(password)< 6:Print(' The password cannot be empty or less than 6 bit, please re-register. ')Continue                 with Open(' Reg.txt ', encoding=' Utf-8 ', mode=' A ') asF2:f2.write ('\ n{}\ t{} '.format(username, password))Print(' registered success ')return# define a login functiondefLogin*Args**Kwargs): Count= 3     whileCount!= 0: username= input(' Please enter your user name: '). Strip () password= input(' Please enter your password: '). Strip () with Open(' Reg.txt ', encoding=' Utf-8 ') asF3: forIinchF3:user=I.strip (). Split ()ifUsername==user[0] andPassword==user[1]:Print(' Login successful ')# Login Successful sign out function                    return            Else: Count-= 1                Print(' your username or password entered incorrectly, please re-enter. You still have%dopportunity. ' %CountPrint(' Your three-time input is exhausted, please try again later. ') Tomorrow's dictation. The role of ①,return. ②, there are several ways to pass a parameter, each of which simply writes a code. For example, arguments are passed by location.defFunc (x, y):P assfunc (' A ', ' B ')

Iron Music study python_day09_ Homework