1. """ Write a program that accepts a sentence and calculate the number of upper case letters and lower case letters. Suppose the following input is supplied to the program: Hello world! Then, the output should be: UPPER CASE 1 LOWER CASE 9 """ def fun(word): u = 0 l = 0 for i in word: if i.isupper(): u += 1 elif i.islower(): l += 1 return print('大写{} 小写{}'.format(u, l)) fun('Hello world!') 2. """ Write a program that computes the value of a+aa+aaa+aaaa with a given digit as the value of a. Suppose the following input is supplied to the program: 9 Then, the output should be: 11106 """ def fun(num): return print(int(num)+int(num*2)+int(num*3)+int(num*4)) fun('9') 3. """ Use a list comprehension to square each odd number in a list. The list is input by a sequence of comma-separated numbers. Suppose the following input is supplied to the program: 1,2,3,4,5,6,7,8,9 Then, the output should be: 1,3,5,7,9 """ def fun(word): li = [i for i in word.split(',') if int(i)%2!=0] return print(','.join(li)) fun('1,2,3,4,5,6,7,8,9') 4. """ Write a program that computes the net amount of a bank account based a transaction log from console input. The transaction log format is shown as following: D 100 W 200 D means deposit while W means withdrawal. Suppose the following input is supplied to the program: D 300 D 300 W 200 D 100 Then, the output should be: 500 """ def fun(): count = 0 while True: word = input('请输入操作类型和金额，以空格分割:') if word: try: type = word.split(' ')[0] num = word.split(' ')[1] except Exception as e: print('格式错误！') continue if type == 'D': count += int(num) elif type == 'W': if count - int(num) > 0: count -= int(num) else: print('余额不足！') else: pass continue else: print(count) break fun() 5. """ A website requires the users to input username and password to register. Write a program to check the validity of password input by users. Following are the criteria for checking the password: 1. At least 1 letter between [a-z] 2. At least 1 number between [0-9] 1. At least 1 letter between [A-Z] 3. At least 1 character from [$#@] 4. Minimum length of transaction password: 6 5. Maximum length of transaction password: 12 Your program should accept a sequence of comma separated passwords and will check them according to the above criteria. Passwords that match the criteria are to be printed, each separated by a comma. Example If the following passwords are given as input to the program: ABd1234@1,a F1#,2w3E*,2We3345 Then, the output of the program should be: ABd1234@1 """ import re def fun(word): li = [] for i in word.split(','): if re.match('^(?=.*[a-z])(?=.*[A-Z])(?=.*[$#@])(?=.*[0-9])[A-Za-z0-9$#@]{6,12}$',i): li.append(i) return print(','.join(li)) fun('ABd1234@1,a F1#,2w3E*,2We3345') 6. """ You are required to write a program to sort the (name, age, height) tuples by ascending order where name is string, age and height are numbers. The tuples are input by console. The sort criteria is: 1: Sort based on name; 2: Then sort based on age; 3: Then sort by score. The priority is that name > age > score. If the following tuples are given as input to the program: Tom,19,80 John,20,90 Jony,17,91 Jony,17,93 Json,21,85 Then, the output of the program should be: [('John', '20', '90'), ('Jony', '17', '91'), ('Jony', '17', '93'), ('Json', '21', '85'), ('Tom', '19', '80')] """ from operator import itemgetter def fun(): li = [] while True: word = input() if not word: break li.append(word) return print(sorted(li,key=itemgetter(0,1,2))) fun() 7. """ Define a class with a generator which can iterate the numbers, which are divisible by 7, between a given range 0 and n. """ def fun(n): for i in range(n): if i %7 == 0: yield i for i in fun(100): print(i) 8. """ A robot moves in a plane starting from the original point (0,0). The robot can move toward UP, DOWN, LEFT and RIGHT with a given steps. The trace of robot movement is shown as the following: UP 5 DOWN 3 LEFT 3 RIGHT 2 ¡ The numbers after the direction are steps. Please write a program to compute the distance from current position after a sequence of movement and original point. If the distance is a float, then just print the nearest integer. Example: If the following tuples are given as input to the program: UP 5 DOWN 3 LEFT 3 RIGHT 2 Then, the output of the program should be: 2 """ import math def fun(): zero = [0, 0] while True: word = input('') if word: type,steep = word.split(' ')[0],int(word.split(' ')[1]) if type == 'UP': zero[1] += steep continue elif type == 'DOWN': zero[1] -= steep continue elif type == 'LEFT': zero[0] -= steep continue elif type == 'RIGHT': zero[0] += steep continue else: print('格式有误，请重新输入！') continue else: print(int(math.sqrt(zero[0]*zero[0]+zero[1]*zero[1]))) break fun() 9. """ Write a program to compute the frequency of the words from the input. The output should output after sorting the key alphanumerically. Suppose the following input is supplied to the program: New to Python or choosing between Python 2 and Python 3? Read Python 2 or Python 3. Then, the output should be: 2:2 3.:1 3?:1 New:1 Python:5 Read:1 and:1 between:1 choosing:1 or:2 to:1 """ def fun(word): dic = {} for i in word.split(' '): if i not in dic.keys(): dic[i] = 1 else: dic[i] += 1 dic1 = sorted(dic.keys()) for i in dic1: print(i+':'+str(dic[i])) fun('New to Python or choosing between Python 2 and Python 3? Read Python 2 or Python 3.') 10. """ Write a program to compute 1/2+2/3+3/4+...+n/n+1 with a given n input by console (n>0). Example: If the following n is given as input to the program: 5 Then, the output of the program should be: 3.55 In case of input data being supplied to the question, it should be assumed to be a console input """ def fun(num): li = [] if num>0: for i in range(1,num+1): li.append(i/(i+1)) else: return print(sun(li)) return print(round(sum(li),2)) fun(5)