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Commit 3c748f8

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added 10+ questions
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‎100+ Python challenging programming exercises.txt

Lines changed: 294 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -1496,6 +1496,9 @@ print re.findall("\d+",s)
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#----------------------------------------#
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Question:
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Print a unicode string "hello world".
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Hints:
@@ -1532,8 +1535,7 @@ Solution:
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# -*- coding: utf-8 -*-
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#----------------------------------------#
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Question:
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Write a program to compute 1/2+2/3+3/4+...+n/n+1 with a given n input by console (n>0).
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@@ -1561,8 +1563,7 @@ print sum
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#----------------------------------------#
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Question:
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Write a program to compute:
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@@ -1598,7 +1599,8 @@ print f(n)
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#----------------------------------------#
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Question:
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The Fibonacci Sequence is computed based on the following formula:
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@@ -1639,7 +1641,7 @@ print f(n)
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#----------------------------------------#
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Question:
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The Fibonacci Sequence is computed based on the following formula:
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@@ -1681,7 +1683,7 @@ print ",".join(values)
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#----------------------------------------#
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Question:
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Please write a program using generator to print the even numbers between 0 and n in comma separated form while n is input by console.
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@@ -1719,8 +1721,7 @@ print ",".join(values)
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#----------------------------------------#
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Question:
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Please write a program using generator to print the numbers which can be divisible by 5 and 7 between 0 and n in comma separated form while n is input by console.
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@@ -1755,13 +1756,297 @@ print ",".join(values)
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#----------------------------------------#
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Question:
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Please write assert statements to verify that every number in the list [2,4,6,8] is even.
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Hints:
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Use "assert expression" to make assertion.
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Solution:
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li = [2,4,6,8]
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for i in li:
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assert i%2==0
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#----------------------------------------#
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Question:
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Please write a program which accepts basic mathematic expression from console and print the evaluation result.
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Example:
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If the following string is given as input to the program:
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35+3
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Then, the output of the program should be:
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38
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Hints:
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Use eval() to evaluate an expression.
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Solution:
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expression = raw_input()
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print eval(expression)
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#----------------------------------------#
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Question:
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Please write a binary search function which searches an item in a sorted list. The function should return the index of element to be searched in the list.
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Hints:
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Use if/elif to deal with conditions.
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Solution:
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import math
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def bin_search(li, element):
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bottom = 0
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top = len(li)-1
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index = -1
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while top>=bottom and index==-1:
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mid = int(math.floor((top+bottom)/2.0))
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if li[mid]==element:
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index = mid
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elif li[mid]>element:
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top = mid-1
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else:
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bottom = mid+1
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return index
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li=[2,5,7,9,11,17,222]
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print bin_search(li,11)
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print bin_search(li,12)
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#----------------------------------------#
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Question:
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Please write a binary search function which searches an item in a sorted list. The function should return the index of element to be searched in the list.
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Hints:
1843+
Use if/elif to deal with conditions.
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Solution:
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import math
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def bin_search(li, element):
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bottom = 0
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top = len(li)-1
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index = -1
1853+
while top>=bottom and index==-1:
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mid = int(math.floor((top+bottom)/2.0))
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if li[mid]==element:
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index = mid
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elif li[mid]>element:
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top = mid-1
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else:
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bottom = mid+1
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return index
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li=[2,5,7,9,11,17,222]
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print bin_search(li,11)
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print bin_search(li,12)
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#----------------------------------------#
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Question:
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Please generate a random float where the value is between 10 and 100 using Python math module.
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Hints:
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Use random.random() to generate a random float in [0,1].
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Solution:
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import random
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print random.random()*100
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#----------------------------------------#
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Question:
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Please generate a random float where the value is between 5 and 95 using Python math module.
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Hints:
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Use random.random() to generate a random float in [0,1].
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Solution:
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import random
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print random.random()*100-5
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#----------------------------------------#
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Question:
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Please write a program to output a random even number between 0 and 10 inclusive using random module and list comprehension.
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Hints:
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Use random.choice() to a random element from a list.
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Solution:
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import random
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print random.choice([i for i in range(11) if i%2==0])
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#----------------------------------------#
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Question:
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Please write a program to output a random number, which is divisible by 5 and 7, between 0 and 10 inclusive using random module and list comprehension.
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Hints:
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Use random.choice() to a random element from a list.
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Solution:
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import random
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print random.choice([i for i in range(201) if i%5==0 and i%7==0])
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#----------------------------------------#
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Question:
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Please write a program to generate a list with 5 random numbers between 100 and 200 inclusive.
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Hints:
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Use random.sample() to generate a list of random values.
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Solution:
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import random
1954+
print random.sample(range(100), 5)
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#----------------------------------------#
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Question:
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Please write a program to randomly generate a list with 5 even numbers between 100 and 200 inclusive.
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Hints:
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Use random.sample() to generate a list of random values.
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Solution:
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import random
1970+
print random.sample([i for i in range(100,201) if i%2==0], 5)
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#----------------------------------------#
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Question:
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Please write a program to randomly generate a list with 5 numbers, which are divisible by 5 and 7 , between 1 and 1000 inclusive.
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Hints:
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Use random.sample() to generate a list of random values.
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Solution:
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import random
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print random.sample([i for i in range(1,1001) if i%5==0 and i%7==0], 5)
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#----------------------------------------#
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Question:
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Please write a program to randomly print a integer number between 7 and 15 inclusive.
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17661995

17671996

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Hints:
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Use random.randrange() to a random integer in a given range.
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Solution:
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import random
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print random.randrange(7,16)
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#----------------------------------------#
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Question:
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Please write a program to compress and decompress the string "hello world!hello world!hello world!hello world!".
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Hints:
2015+
Use zlib.compress() and zlib.decompress() to compress and decompress a string.
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Solution:
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import zlib
2021+
s = 'hello world!hello world!hello world!hello world!'
2022+
t = zlib.compress(s)
2023+
print t
2024+
print zlib.decompress(t)
2025+
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#----------------------------------------#
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Question:
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Please write a program to print the running time of execution of "1+1" for 100 times.
2030+
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Hints:
2034+
Use timeit() function to measure the running time.
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Solution:
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from timeit import Timer
2039+
t = Timer("for i in range(100):1+1")
2040+
print t.timeit()
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#----------------------------------------#
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#----------------------------------------#
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#----------------------------------------#
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#----------------------------------------#

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