Reading Files

Mode

r - Opens a file for reading. (default)

w - Opens a file for writing. Creates a new file if it does not exist or truncates the file if it exists.

x - Opens a file for exclusive creation. If the file already exists, the operation fails.

a - Opens a file for appending at the end of the file without truncating it. Creates a new file if it does not exist.

t - Opens in text mode. (default)

b - Opens in binary mode.

+ - Opens a file for updating. (reading and writing)

employees.txt

Jim - Salesman
Dwight - Salesman
Pam - Receptionist
Michael - Manager
Oscar - Accountant
Toby - Human Resources
Kelly - Customer Service

employee_file = open("../employees.txt", "r")

if employee_file.readable():
    print(employee_file.read())
else:
    print("Access denied.")

employee_file.close()

//Output : Jim - Salesman
//         Dwight - Salesman
//         Pam - Receptionist
//         Michael - Manager
//         Oscar - Accountant
//         Toby - Human Resources
//         Kelly - Customer Service

employee_file = open("../employees.txt", "r")

if employee_file.readable():
    print(employee_file.readline())
else:
    print("Access denied.")

employee_file.close()

//Output : Jim - Salesman

employee_file = open("../employees.txt", "r")

if employee_file.readable():
    print(employee_file.readlines()[1])
else:
    print("Access denied.")

employee_file.close()

//Output : Dwight - Salesman

employee_file = open("../employees.txt", "r")

if employee_file.readable():
    for employee in employee_file.readlines():
        print(employee)
else:
    print("Access denied.")

employee_file.close()

//Output : Jim - Salesman
//          
//         Dwight - Salesman
//          
//         Pam - Receptionist
//          
//         Michael - Manager
//          
//         Oscar - Accountant
//          
//         Toby - Human Resources
//          
//         Kelly - Customer Service