Goals
Understanding fundamentals of Python programming:
- Variables, data types, lists, sets and tuples.
- Conditional expressions and loops
- Sort
- Dictionary
- Files and user interaction
- Name of student
- Age
- Grades in 5 modules
- average grade
- maximum grade
- minimum grade
- number of characters in the HTML file
- number of lines in the HTML file
- number of words in the HTML file
- first twenty words in the HTML file
- distinct words in the HTML file
- the maximum value of population
- the minimum value of population
Exercise 1
1. Comments
# This is a comment
print("Bonjour")
2. Variables
# a variable
message = "le monde!"
print(message)
a = 10
b = 20
c = a + b
print(c)
# floating point numbers
pi = 3.14
print(pi)
# data types
message1 = "Bonjour"
a = 12
pi = 3.14
print(type(message1))
print(type(a))
print(type(pi))
3. Concatenation of two strings
# concatenation of two strings
message = "le monde!"
print("Bonjour" + message)
# concatenation of two strings
message1 = "Bonjour "
message2 = "le monde!"
print(message1 + message2)
# concatenation involving two variables of different data types
# operation + on two different data types
message1 = "Bonjour en Python"
a = 3
print(message1 + a)
# concatenation solution involving two variables of different data types
message1 = "Bonjour en Python "
a = 3
print(message1 + str(a))
4. Lists
a = [10, 20, 30, 40, 50]
print(a)
a = [10, 20, 30, 40, 50]
print(a[0])
print(a[1])
print(a[2])
print(a[3])
print(a[4])
a = [10, 20, 30, 40, 50]
print(a[8])
message1 = "Bonjour en Python "
print(message1[0])
print(message1[1])
print(message1[2])
print(message1[3])
print(message1[4])
print(message1[5])
print(message1[6])
print(message1[7])
message1 = "Bonjour en Python "
print(len(message1))
a = [10, 20, 30, 40, 50]
print(len(a))
a = [10, 20, 30, 40, 50]
a.append(60)
print(a)
a = [10, 20, 30, 40, 50]
a[0] = 0
print(a)
a = [10, 20, 30, 40, 50]
a[6] = 20
print(a)
a = [10, 20, 30, 40, 50]
a.insert(0, 0)
print(a)
print(len(a))
a = [10, 20, 30, 40, 50]
a.insert(6,60)
print(a)
print(len(a))
5. Tuples (non-modifiable lists)
a = (10, 20, 30, 40, 50)
print(a)
a = (10, 20, 30, 40, 50)
print(a[0])
a = (10, 20, 30, 40, 50)
a[0] = 0
print(a)
6. Sets
a = {10, 20, 30, 40, 50, 10, 20, 30, 40, 50}
print(a)
a = {10, 20, 30, 40, 50, 10, 20, 30, 40, 50}
a.add(10)
print(a)
a = {10, 20, 30, 40, 50, 10, 20, 30, 40, 50}
a.add(60)
print(a)
a = {10, 20, 30, 40, 50, 10, 20, 30, 40, 50}
a.remove(40)
print(a)
# set
a = {10, 20, 30, 40, 50, 10, 20, 30, 40, 50}
print(a)
print(type(a))
# tuple
b = (10, 20, 30, 40, 50, 10, 20, 30, 40, 50)
print(b)
print(type(b))
# list
c= [10, 20, 30, 40, 50, 10, 20, 30, 40, 50]
print(c)
print(type(c))
Exercise 2
1. Conditional Expressions
a = 12
if( a%2 == 0):
print(a, " is divisible by 2")
else:
print(a, " is not divisible by 2")
lang = "Français"
if (lang =="Français"):
print("Bonjour le monde!")
else:
print("Hello World!")
2. Loops
for i in [10, 20, 30, 40, 50, 10, 20, 30, 40, 50]:
print(i)
for i in (10, 20, 30, 40, 50, 10, 20, 30, 40, 50):
print(i)
for i in {10, 20, 30, 40, 50, 10, 20, 30, 40, 50}:
print(i)
2. Range
for i in range(0,10):
print(i)
for i in range(0,10,2):
print(i)
for i in range(0,10,2):
print(i, end=' ')
for i in range(10,0,-2):
print(i)
for i in range(10,0):
print(i)
for i in "Bonjour,le,monde!".split():
print(i)
for i in "Bonjour,le,monde!".split(","):
print(i)
Write a program in Python to display the following output
1
12
123
1234
12345
123456
1234567
12345678
Exercise 3
1. Sort
num = [10, 20, 30, 40, 50, 10, 20, 30, 40, 50]
num.sort()
print(num)
2. Sort (decreasing order)
num = [10, 20, 30, 40, 50, 10, 20, 30, 40, 50]
num.sort(reverse=True)
print(num)
3. minimum
num = [10, 20, 30, 40, 50, 10, 20, 30, 40, 50]
print(min(num))
4. maximum
num = [10, 20, 30, 40, 50, 10, 20, 30, 40, 50]
print(max(num))
5. sorted()
num = [70, 20, 30, 10, 50, 60, 20, 80, 70, 50]
num = sorted(num,reverse=True)[:5]
print(num)
Modify the code given below to display the five greatest unique numbers.
print(sorted("Bonjour le monde!".split(), key=str.lower,
reverse=True))
Exercise 4
1. Dictionary
a = {"contente": 12, "content": 12, "triste": 2}
print(a)
print(type(a))
a = {"contente": 12, "content": 12, "triste": 2}
for cle in a:
print("la phrase ", key, " apparait ", a[cle], " fois")
a = {"contente": 12, "content": 12, "triste": 2}
for key,value in a.items():
print("la phrase ", key, " apparait ", value, " fois")
a = {"contente": 12, "content": 12, "triste": 2}
a["joie"] = 10
print(a)
a = {"contente": 12, "content": 12, "triste": 2}
del a["triste"]
print(a)
mots = {"contente": 12, "content": 12, "triste": 2,
"joie" : 10}
print(sorted(mots))
mots = {"contente": 12, "content": 12, "triste": 2,
"joie" : 10}
mots_tuple = [(key, value) for key,value in mots.items()]
print(mots_tuple)
2. itemgetter
from operator import itemgetter
mots = {"contente": 12, "content": 12, "triste": 2,
"joie" : 10}
mots_tuple = [(key, value) for key,value in mots.items()]
print(sorted(mots_tuple, key=itemgetter(1)))
3. Interaction avec l'utilisateur
nom = input("Quel est votre nom?")
print(nom)
age = input("Quel est votre âge? ")
print(age)
print(type(age))
age = input("Quel est votre âge? ")
age = int(age)
print(age)
print(type(age))
Question: Write a program in Python that interacts with the user to obtain the following information of 5 students:
Once the information for all the five students is obtained, calculate and display the following values for every module:
Exercise 5
1. Files
message = "Bonjour le monde"
with open("bonjour.txt", "w") as file:
file.write(message)
file.close()
with open("bonjour.txt", "r") as file:
text = file.read()
print(text)
file.close()
message1 = "Bonjour le monde"
message2 = "Programmation en Python"
with open("bonjour.txt", "w") as file:
file.write(message1)
file.write(message2)
file.close()
with open("bonjour.txt", "r") as file:
text = file.read()
print(text)
file.close()
message1 = "Bonjour le monde\n"
message2 = "Programmation en Python"
with open("bonjour.txt", "w") as file:
file.write(message1)
file.write(message2)
file.close()
with open("bonjour.txt", "r") as file:
text = file.read()
print(text)
file.close()
2. readline()
message1 = "Bonjour le monde\n"
message2 = "Programmation en Python"
with open("bonjour.txt", "w") as file:
file.write(message1)
file.write(message2)
file.close()
with open("bonjour.txt", "r") as file:
text = file.readline()
print(text)
file.close()
message1 = "Bonjour le monde\n"
message2 = "Programmation en Python\n"
with open("bonjour.txt", "w") as file:
file.write(message1)
file.write(message2)
file.close()
with open("bonjour.txt", "r") as file:
for line in file:
print(line)
file.close()
Question: Copy any HTML file in your home directory. Write a program in Python to get the following values:
Question: Copy CSV file in your home directory. The file contains the population values between 1901 and 2016. Write a program in Python to get the maximum value.