https://github.com/devqueue/cs-practical-repo
https://github.com/devqueue/cs-practical-repo
Last synced: about 1 year ago
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- Host: GitHub
- URL: https://github.com/devqueue/cs-practical-repo
- Owner: devqueue
- Created: 2021-04-08T13:49:03.000Z (about 5 years ago)
- Default Branch: main
- Last Pushed: 2021-04-12T04:58:54.000Z (about 5 years ago)
- Last Synced: 2024-10-12T00:30:47.861Z (over 1 year ago)
- Language: Python
- Size: 1.53 MB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# CS-practical-repo
Author: Hazique sayyed
PYTHON
### Program 1
##### Aim: To write a simple calculator to find sum, diference, product and division
#### Source code:
``` python
def add(x, y):
return x + y
def subtract(x, y):
return x - y
def multiply(x, y):
return x * y
def divide(x, y):
return x / y
print("Select operation.")
print("1.Add")
print("2.Subtract")
print("3.Multiply")
print("4.Divide")
while True:
choice = input("Enter choice(1/2/3/4): ")
if choice in ('1', '2', '3', '4'):
num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))
if choice == '1':
print(num1, "+", num2, "=", add(num1, num2))
elif choice == '2':
print(num1, "-", num2, "=", subtract(num1, num2))
elif choice == '3':
print(num1, "*", num2, "=", multiply(num1, num2))
elif choice == '4':
print(num1, "/", num2, "=", divide(num1, num2))
break
else:
print("Invalid Input")
```
#### Output:
---
### Program 2
#### AIM: To Write a Python program to read a text file and remove all the lines that contains the character ‘a’ in the file and write it in another file
#### Source code:
```python
oldfile = open('content.txt')
lines = oldfile.readlines()
newopen = open('newfile.txt', 'w')
#print(lines)
for line in lines:
if 'a' in line:
#print(line)
newopen.write(line)
newopen.close()
oldfile.close()
print("Contents copied over to newfile.txt")
```
#### Output:
---
### Program 3
#### AIM: To write a Python program to read a text file line by line and display each word seperated by a #.
#### Source code:
```python
with open('story.txt', 'r') as f:
for line in f:
for word in line.split():
print(word, end="#")
print('\n')
```
#### Output:
---
### Program 4
#### AIM: To Write a Python program to read a text file line by line and display the number of vowels/ consonants / upper case letters and lower case characters.
#### Source code:
```python
vowels = ['a','e','i','o','u']
vowels_count = 0
consonat_count = 0
upper_count = 0
lower_count = 0
file = open('story.txt', 'r')
data = file.read()
print(data)
for ch in data:
if str.isupper(ch):
upper_count += 1
elif str.islower(ch):
lower_count += 1
ch2 = str.lower(ch)
if ch2 in vowels:
vowels_count+=1
elif ch2 not in vowels:
consonat_count+=1
print(f"No. of vowels are {vowels_count}")
print(f"No. of constants are {consonat_count}")
print(f"No. of upper case are {upper_count}")
print(f"No. of lower case are {lower_count}")
file.close()
```
#### Output:
---
### Program 5
#### AIM: To Write a Python program to create a binary file with roll number , name and marks. Input a roll number and update the marks.
#### Source code:
```python
import pickle
import pprint as pp
import sys
def Display(data):
data = {}
file = open("Student.pickle", 'rb')
try:
while True:
Student = pickle.load(file)
pp.pprint(Student)
except EOFError:
file.close()
def Search(data):
data = {}
file = open("Student.pickle", 'rb+')
reader = int(input("Enter the Roll No. to search: "))
found = False
try:
while True:
data = pickle.load(file)
if data["Roll"] == reader:
print("Record Found")
print(data)
found = True
break
except EOFError:
if found == False:
print("Record not found \n \n")
file.close()
def write_in_file(data):
data = {}
studs = int(input("Enter no. of students: "))
file = open("Student.pickle", "rb+")
for i in range(1,studs+1):
data["Roll"] = int(input("Enter the Roll NO: "))
data["Name"] = input("Enter a name: ")
data["Marks"] = float(input("Enter the marks: "))
pickle.dump(data, file)
print(f"{i} Record(s) Entered Sucessfully")
data={}
file.close()
def Update_marks(data):
data = {}
found = False
reader = int(input("Enter the Roll No. to update: "))
file = open("Student.pickle", 'rb+')
try:
while True:
pos = file.tell()
data = pickle.load(file)
if data["Roll"] == reader:
print("Record Found")
print(data)
data["Marks"] = float(input("Enter the marks: "))
file.seek(pos)
found = True
pickle.dump(data, file)
break
except EOFError:
if found == False:
print("Record not found \n \n")
else:
print("Marks updated Sucessfully")
file.close()
Sdata = {}
#main program
while True:
print("Menu \n 1-Write in a file \n 2-display \n 3-Search \n 4-Update Marks \n 5-exit")
ch = int(input("Enter a Choice: "))
if ch == 1:
write_in_file(Sdata)
if ch == 2:
Display(Sdata)
if ch == 3:
Search(Sdata)
if ch == 4:
Update_marks(Sdata)
if ch == 5:
sys.exit()
```
#### Output:
---
### Program 6
#### AIM: To write a Python program to read a text file ( story.txt) line by line and print it.
#### Source code:
``` python
story = "story.txt"
with open(story, "r") as f:
lines = f.readlines()
for line in lines:
print(line)
```
#### Output:
---
### Connectivity:
#### AIM: To execute an sql query using python
#### Source code:
```python
import mysql.connector as sqltor
connection = sqltor.connect(host="localhost",user="root",password="****!",database='sales')
cursor = connection.cursor()
cursor.execute('Select * from orders where salesman_id=5001')
data = cursor.fetchall()
print (data)
cursor.close()
connection.close()
```
#### Output:
