File handling

# read a file

# Bruce,91923291923,bruce@email.com
# Alfred,3233123124,Alfred@mail.com


with open("file_name.csv", "r") as file_variable:
    f = file_variable.read() # read complete file
    f = file_variable.readline() # read line by line line1
    f = file_variable.readline() # read line by line line2 # returns None when there is nothing left to read

    for line in file_variable: # read all lines one by one
        ls = line.split(",")


with open("file_name.csv", "w") as file:
    file.write(name + "," + phone + "," + email)


def saveContact(name, phone, email):
    with open("file_name.csv", "a") as file:
        file.write(name + "," + phone + "," + email + "\n")