Learn Python Online in 100 Days - Week 4 Day 2

May 28, 2023#python学习29

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Today I learned about defining functions in Python, which allows for repeated use of code. Function names can include letters, numbers, and underscores, but cannot start with a number, have spaces, or be the same as Python's built-in functions. Proper indentation is important in Python. I used a function to create a user login interface that verifies usernames and passwords, providing error messages and allowing for re-entry if needed.

Record#

Catbox

Today learned def. def is to define a function, which can be repeatedly called in the code.
The naming of functions can include letters, numbers, underscores, etc., cannot start with a number, cannot have spaces, and cannot be the same as Python built-in functions.
Pay attention to the indentation of the context code of the function. Python is really a language that strictly requires indentation.
Use functions to create a user login interface to verify the username and password. When there is an error, prompt the error and ask for re-entry.

CODE#

print("User login page")
print()


def ulogin():
    u = ""
    p = ""
    while True:
        u = input("Enter username:")
        p = input("Enter password:")
        if u == "user" and p == "pass":
            print("Welcome, user!")
            break
        else:
            print("Incorrect username or password, please try again")
            continue


ulogin()