打卡 on Clarity

Python打卡Day1

Sun, 24 May 2026 00:00:00 +0000

Question 1

Question:

Write a program which will find all such numbers which are divisible by 7 but are not a multiple of 5, between 2000 and 3200 (both included).The numbers obtained should be printed in a comma-separated sequence on a single line.

Hints:

Consider use range(#begin, #end) method.

Main author's Solution: Python 2

1l=[]
2for i in range(2000, 3201):
3    if (i%7==0) and (i%5!=0):
4        l.append(str(i))
5
6print ','.join(l)

My Solution: Python 3

Using for loops

1for i in range(2000,3201):
2    if i%7 == 0 and i%5!=0:
3        print(i,end=',')
4print("\b")

Using generators and list comprehension

1print(*(i for i in range(2000, 3201) if i%7 == 0 and i%5 != 0), sep=",")

Question 2

Question:

Write a program which can compute the factorial of a given numbers.The results should be printed in a comma-separated sequence on a single line.Suppose the following input is supplied to the program: 8 Then, the output should be:40320

Python打卡Day10

Sun, 24 May 2026 00:00:00 +0000

Question 31

Question:

Define a function which can print a dictionary where the keys are numbers between 1 and 20 (both included) and the values are square of keys.

Hints:

1Use dict[key]=value pattern to put entry into a dictionary.Use ** operator to get power of a number.Use range() for loops.

Main Author's Solution: Python 2

1def printDict():
2	d=dict()
3	for i in range(1,21):
4		d[i]=i**2
5	print d
6
7printDict()

My Solution: Python 3

1def printDict():
2    dict={i:i**2 for i in range(1,21)}   # Using comprehension method and
3    print(dict)
4
5printDict()

Question 32

Question:

Define a function which can generate a dictionary where the keys are numbers between 1 and 20 (both included) and the values are square of keys. The function should just print the keys only.

Python打卡Day11

Sun, 24 May 2026 00:00:00 +0000

Question 38

Question:

With a given tuple (1,2,3,4,5,6,7,8,9,10), write a program to print the first half values in one line and the last half values in one line.

Hints:

Use [n1:n2] notation to get a slice from a tuple.

Main Author's Solution: Python 2

1tp = (1,2,3,4,5,6,7,8,9,10)
2tp1 = tp[:5]
3tp2 = tp[5:]
4print tp1
5print tp2

My Solution: Python 3

1tpl = (1,2,3,4,5,6,7,8,9,10)
2
3for i in range(0,5):
4    print(tpl[i],end = ' ')
5print()
6for i in range(5,10):
7    print(tpl[i],end = ' ')

 1tpl = (1,2,3,4,5,6,7,8,9,10)
 2lst1,lst2 = [],[]
 3
 4for i in range(0,5):
 5    lst1.append(tpl[i])
 6
 7for i in range(5,10):
 8    lst2.append(tpl[i])
 9
10print(lst1)
11print(lst2)

Python打卡Day12

Sun, 24 May 2026 00:00:00 +0000

Question 44

Question:

Write a program which can map() to make a list whose elements are square of numbers between 1 and 20 (both included).

Hints:

Use map() to generate a list. Use lambda to define anonymous functions.

Main Author's Solution: Python 2

1squaredNumbers = map(lambda x: x**2, range(1,21))
2print squaredNumbers

My Solution: Python 3

1def sqr(x):
2    return x*x
3
4squaredNumbers = list(map(sqr, range(1,21)))
5print (squaredNumbers)

Question 45

Question:

Define a class named American which has a static method called printNationality.

Python打卡Day13

Sun, 24 May 2026 00:00:00 +0000

Question 47

Question

Define a class named Circle which can be constructed by a radius. The Circle class has a method which can compute the area.

Hints

Use def methodName(self) to define a method.

Main author's Solution: Python 2

1class Circle(object):
2    def __init__(self, r):
3        self.radius = r
4
5    def area(self):
6        return self.radius**2*3.14
7
8aCircle = Circle(2)
9print aCircle.area()

My Solution: Python 3

 1class Circle():
 2    def __init__(self,r):
 3        self.radius = r
 4
 5    def area(self):
 6        return 3.1416*(self.radius**2)
 7
 8
 9circle = Circle(5)
10print(circle.area())

Question 48

Question

Define a class named Rectangle which can be constructed by a length and width. The Rectangle class has a method which can compute the area.

Python打卡Day14

Sun, 24 May 2026 00:00:00 +0000

Question 51

Question

Write a function to compute 5/0 and use try/except to catch the exceptions.

Hints

Use try/except to catch exceptions.

Main author's Solution: Python 2

 1def throws():
 2    return 5/0
 3
 4try:
 5    throws()
 6except ZeroDivisionError:
 7    print "division by zero!"
 8except Exception, err:
 9    print 'Caught an exception'
10finally:
11    print 'In finally block for cleanup'

My Solution: Python 3

1def divide():
2    return 5/0
3
4try:
5    divide()
6except ZeroDivisionError as ze:
7    print("Why on earth you are dividing a number by ZERO!!")
8except:
9    print("Any other exception")

Question 52

Question

Define a custom exception class which takes a string message as attribute.

Python打卡Day15

Sun, 24 May 2026 00:00:00 +0000

Question 54

Question

Assuming that we have some email addresses in the "username@companyname.com" format, please write program to print the company name of a given email address. Both user names and company names are composed of letters only.

Example: If the following email address is given as input to the program:

1john@google.com

Then, the output of the program should be:

1google

In case of input data being supplied to the question, it should be assumed to be a console input.

Python打卡Day16

Sun, 24 May 2026 00:00:00 +0000

Question 60

Question

Write a program to compute:

1f(n)=f(n-1)+100 when n>0
2and f(0)=0

with a given n input by console (n>0).

Example: If the following n is given as input to the program:

Then, the output of the program should be:

In case of input data being supplied to the question, it should be assumed to be a console input.

Hints

We can define recursive function in Python.

Python打卡Day17

Sun, 24 May 2026 00:00:00 +0000

Question 65

Question

Please write assert statements to verify that every number in the list [2,4,6,8] is even.

Hints

Use "assert expression" to make assertion.

Main author's Solution: Python 2

1li = [2,4,6,8]
2for i in li:
3    assert i%2==0

My Solution: Python 3

1data = [2,4,5,6]
2for i in data:
3    assert i%2 == 0, "{} is not an even number".format(i)

Question 66

Question

Please write a program which accepts basic mathematic expression from console and print the evaluation result.

Example: If the following n is given as input to the program:

Python打卡Day18

Sun, 24 May 2026 00:00:00 +0000

Question 70

Question

Please write a program to output a random even number between 0 and 10 inclusive using random module and list comprehension.

Hints

Use random.choice() to a random element from a list.

Main author's Solution: Python 2

1li = [2,4,6,8]
2import random
3print random.choice([i for i in range(11) if i%2==0])

My Solution: Python 3

1import random
2resp = [i for i in range(0,11,2)]
3print(random.choice(resp))

Question 71

Question

Please write a program to output a random number, which is divisible by 5 and 7, between 10 and 150 inclusive using random module and list comprehension.

Python打卡Day19

Sun, 24 May 2026 00:00:00 +0000

Question 75

Question

Please write a program to randomly print a integer number between 7 and 15 inclusive.

Hints

Use random.randrange() to a random integer in a given range.

Solution:

1import random
2print random.randrange(7,16)

Question 76

Question

Please write a program to compress and decompress the string "hello world!hello world!hello world!hello world!".

Hints

Use zlib.compress() and zlib.decompress() to compress and decompress a string.

Solution:

1import zlib
2s = 'hello world!hello world!hello world!hello world!'
3t = zlib.compress(s)
4print t
5print zlib.decompress(t)

1'''Solution by: anas1434 
2'''
3s = 'hello world!hello world!hello world!hello world!'
4# In Python 3 zlib.compress() accepts only DataType <bytes>
5y = bytes(s, 'utf-8')
6x = zlib.compress(y)
7print(x)
8print(zlib.decompress(x))

Question 77

Question

Please write a program to print the running time of execution of "1+1" for 100 times.

Python打卡Day2

Sun, 24 May 2026 00:00:00 +0000

Question 4

Question:

Write a program which accepts a sequence of comma-separated numbers from console and generate a list and a tuple which contains every number.Suppose the following input is supplied to the program:

134,67,55,33,12,98

Then, the output should be:

1['34', '67', '55', '33', '12', '98']
2('34', '67', '55', '33', '12', '98')

Hints:

In case of input data being supplied to the question, it should be assumed to be a console input.tuple() method can convert list to tuple

Python打卡Day20

Sun, 24 May 2026 00:00:00 +0000

Question 80

Question

Please write a program to print the list after removing even numbers in [5,6,77,45,22,12,24].

Hints

Use list comprehension to delete a bunch of element from a list.

Main author's Solution: Python 2

1li = [5,6,77,45,22,12,24]
2li = [x for x in li if x%2!=0]
3print li

My Solution: Python 3

1def isEven(n):
2    return n%2!=0
3
4li = [5,6,77,45,22,12,24]
5lst = list(filter(isEven,li))
6print(lst)

1li = [5,6,77,45,22,12,24]
2lst = list(filter(lambda n:n%2!=0,li))
3print(lst)

Question 81

Question

By using list comprehension, please write a program to print the list after removing numbers which are divisible by 5 and 7 in [12,24,35,70,88,120,155].

Python打卡Day21

Sun, 24 May 2026 00:00:00 +0000

Question 85

Question

By using list comprehension, please write a program to print the list after removing the 0th,4th,5th numbers in [12,24,35,70,88,120,155].

Hints

Use list comprehension to delete a bunch of element from a list.Use enumerate() to get (index, value) tuple.

Main author's Solution: Python 2

1li = [12,24,35,70,88,120,155]
2li = [x for (i,x) in enumerate(li) if i not in (0,4,5)]
3print li

My Solution: Python 3

1li = [12,24,35,70,88,120,155]
2li = [li[i] for i in range(len(li)) if i not in (0,4,5)]
3print(li)

1'''Solution by: pratikb0501
2'''
3li = [12, 24, 35, 70, 88, 120, 155]
4print(list(j for i, j in enumerate(li) if i != 0 and i != 4 and i != 5))

Question 86

Question

By using list comprehension, please write a program to print the list after removing the value 24 in [12,24,35,24,88,120,155].

Python打卡Day22

Sun, 24 May 2026 00:00:00 +0000

Question 90

Question

Please write a program which count and print the numbers of each character in a string input by console.

Example: If the following string is given as input to the program:

1abcdefgabc

Then, the output of the program should be:

1a,2
2c,2
3b,2
4e,1
5d,1
6g,1
7f,1

Hints

Use dict to store key/value pairs. Use dict.get() method to lookup a key with default value.

Main author's Solution: Python 2

Python打卡Day23

Sun, 24 May 2026 00:00:00 +0000

The extended part of the repository starts from this page. Previous 94 problems were collected from the repository mentioned in intro. The following problems are collected from Hackerrank and other resources from internet.All the given solutions are in python 3.

Question 95

Question

Given the participants' score sheet for your University Sports Day, you are required to find the runner-up score. You are given scores. Store them in a list and find the score of the runner-up.

Python打卡Day24

Sun, 24 May 2026 00:00:00 +0000

Question 100

Question

You are given words. Some words may repeat. For each word, output its number of occurrences. The output order should correspond with the input order of appearance of the word. See the sample input/output for clarification.

If the following string is given as input to the program:
14
2bcdef
3abcdefg
4bcde
5bcdef
Then, the output of the program should be:
13
22 1 1

Hints

Make a list to get the input order and a dictionary to count the word frequency

Python打卡Day3

Sun, 24 May 2026 00:00:00 +0000

Question 10

Question

Write a program that accepts a sequence of whitespace separated words as input and prints the words after removing all duplicate words and sorting them alphanumerically.

Suppose the following input is supplied to the program:

1hello world and practice makes perfect and hello world again

Then, the output should be:

1again and hello makes perfect practice world

Hints:

In case of input data being supplied to the question, it should be assumed to be a console input.We use set container to remove duplicated data automatically and then use sorted() to sort the data.