Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly
Sign up
Appearance settings

Commit febcb48

Browse files
committed
added more questions
1 parent 229c08b commit febcb48

File tree

1 file changed

+269
-0
lines changed

1 file changed

+269
-0
lines changed

‎100+ Python challenging programming exercises.txt‎

Lines changed: 269 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1291,6 +1291,9 @@ print aCircle.area()
12911291

12921292

12931293
#----------------------------------------#
1294+
1295+
7.2
1296+
12941297
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.
12951298

12961299
Hints:
@@ -1314,6 +1317,9 @@ print aRectangle.area()
13141317

13151318

13161319
#----------------------------------------#
1320+
1321+
7.2
1322+
13171323
Define a class named Shape and its subclass Square. The Square class has an init function which takes a length as argument. Both classes have a area function which can print the area of the shape where Shape's area is 0 by default.
13181324

13191325
Hints:
@@ -1350,10 +1356,273 @@ print aSquare.area()
13501356
#----------------------------------------#
13511357

13521358

1359+
Please raise a RuntimeError exception.
13531360

1361+
Hints:
13541362

1363+
Use raise() to raise an exception.
1364+
1365+
Solution:
1366+
1367+
raise RuntimeError('something wrong')
13551368

13561369

13571370

13581371
#----------------------------------------#
1372+
Write a function to compute 5/0 and use try/except to catch the exceptions.
1373+
1374+
Hints:
1375+
1376+
Use try/except to catch exceptions.
1377+
1378+
Solution:
1379+
1380+
def throws():
1381+
return 5/0
1382+
1383+
try:
1384+
throws()
1385+
except ZeroDivisionError:
1386+
print "division by zero!"
1387+
except Exception, err:
1388+
print 'Caught an exception'
1389+
finally:
1390+
print 'In finally block for cleanup'
1391+
1392+
1393+
#----------------------------------------#
1394+
Define a custom exception class which takes a string message as attribute.
1395+
1396+
Hints:
1397+
1398+
To define a custom exception, we need to define a class inherited from Exception.
1399+
1400+
Solution:
1401+
1402+
class MyError(Exception):
1403+
"""My own exception class
1404+
1405+
Attributes:
1406+
msg -- explanation of the error
1407+
"""
1408+
1409+
def __init__(self, msg):
1410+
self.msg = msg
1411+
1412+
error = MyError("something wrong")
1413+
1414+
#----------------------------------------#
1415+
Question:
1416+
1417+
Assuming that we have some email addresses in the "username@companyname.com" format, please write program to print the user name of a given email address. Both user names and company names are composed of letters only.
1418+
1419+
Example:
1420+
If the following email address is given as input to the program:
1421+
1422+
john@google.com
1423+
1424+
Then, the output of the program should be:
1425+
1426+
john
1427+
1428+
In case of input data being supplied to the question, it should be assumed to be a console input.
1429+
1430+
Hints:
1431+
1432+
Use \w to match letters.
1433+
1434+
Solution:
1435+
import re
1436+
emailAddress = raw_input()
1437+
pat2 = "(\w+)@((\w+\.)+(com))"
1438+
r2 = re.match(pat2,emailAddress)
1439+
print r2.group(1)
1440+
1441+
1442+
#----------------------------------------#
1443+
Question:
1444+
1445+
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.
1446+
1447+
Example:
1448+
If the following email address is given as input to the program:
1449+
1450+
john@google.com
1451+
1452+
Then, the output of the program should be:
1453+
1454+
google
1455+
1456+
In case of input data being supplied to the question, it should be assumed to be a console input.
1457+
1458+
Hints:
1459+
1460+
Use \w to match letters.
1461+
1462+
Solution:
1463+
import re
1464+
emailAddress = raw_input()
1465+
pat2 = "(\w+)@(\w+)\.(com)"
1466+
r2 = re.match(pat2,emailAddress)
1467+
print r2.group(2)
1468+
1469+
1470+
1471+
1472+
#----------------------------------------#
1473+
Question:
1474+
1475+
Write a program which accepts a sequence of words separated by whitespace as input to print the words composed of digits only.
1476+
1477+
Example:
1478+
If the following words is given as input to the program:
1479+
1480+
2 cats and 3 dogs.
1481+
1482+
Then, the output of the program should be:
1483+
1484+
['2', '3']
1485+
1486+
In case of input data being supplied to the question, it should be assumed to be a console input.
1487+
1488+
Hints:
1489+
1490+
Use re.findall() to find all substring using regex.
1491+
1492+
Solution:
1493+
import re
1494+
s = raw_input()
1495+
print re.findall("\d+",s)
1496+
1497+
1498+
#----------------------------------------#
1499+
Print a unicode string "hello world".
1500+
1501+
Hints:
1502+
1503+
Use u'strings' format to define unicode string.
1504+
1505+
Solution:
1506+
1507+
unicodeString = u"hello world!"
1508+
print unicodeString
1509+
1510+
#----------------------------------------#
1511+
Write a program to read an ASCII string and to convert it to a unicode string encoded by utf-8.
1512+
1513+
Hints:
1514+
1515+
Use unicode() function to convert.
1516+
1517+
Solution:
1518+
1519+
s = raw_input()
1520+
u = unicode( s ,"utf-8")
1521+
print u
1522+
1523+
#----------------------------------------#
1524+
Question:
1525+
1526+
Write a special comment to indicate a Python source code file is in unicode.
1527+
1528+
Hints:
1529+
1530+
Solution:
1531+
1532+
# -*- coding: utf-8 -*-
1533+
1534+
#----------------------------------------#
1535+
1536+
8
1537+
1538+
Write a program to compute 1/2+2/3+3/4+...+n/n+1 with a given n input by console (n>0).
1539+
1540+
Example:
1541+
If the following n is given as input to the program:
1542+
1543+
5
1544+
1545+
Then, the output of the program should be:
1546+
1547+
3.55
1548+
1549+
In case of input data being supplied to the question, it should be assumed to be a console input.
1550+
1551+
Solution:
1552+
1553+
n=int(raw_input())
1554+
sum=0.0
1555+
for i in range(1,n+1):
1556+
sum += float(float(i)/(i+1))
1557+
print sum
1558+
1559+
1560+
#----------------------------------------#
1561+
1562+
8
1563+
1564+
Write a program to compute:
1565+
1566+
f(n)=f(n-1)+100 when n>0
1567+
and f(0)=1
1568+
1569+
with a given n input by console (n>0).
1570+
1571+
Example:
1572+
If the following n is given as input to the program:
1573+
1574+
5
1575+
1576+
Then, the output of the program should be:
1577+
1578+
500
1579+
1580+
In case of input data being supplied to the question, it should be assumed to be a console input.
1581+
1582+
Solution:
1583+
1584+
def f(n):
1585+
if n==0:
1586+
return 0
1587+
else:
1588+
return f(n-1)+100
1589+
1590+
n=int(raw_input())
1591+
print f(n)
1592+
1593+
#----------------------------------------#
1594+
1595+
1596+
1597+
1598+
1599+
#----------------------------------------#
1600+
1601+
1602+
1603+
1604+
1605+
#----------------------------------------#
1606+
1607+
1608+
1609+
1610+
1611+
#----------------------------------------#
1612+
1613+
1614+
1615+
1616+
1617+
#----------------------------------------#
1618+
1619+
1620+
1621+
1622+
1623+
#----------------------------------------#
1624+
1625+
1626+
1627+
13591628

0 commit comments

Comments
(0)

AltStyle によって変換されたページ (->オリジナル) /