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This article mainly introduces "how to achieve alien invasion games with Python". In daily operation, I believe many people have doubts about how to achieve alien invasion games with Python. Xiaobian consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the doubts about "how to achieve alien invasion games with Python". Next, please follow the editor to study!

Usage analysis

Currently, if the player holds down the arrow keys long enough, the ship will move out of the screen and disappear without a trace. Let's fix this problem and let the ship stop moving when it reaches the edge of the screen. To do this, we will modify the method update () of the Ship class

Code example

# =

# function: shipclass # author: brother python

# time: 2020-7-12

# Wechat official account: DJXY00001

# Wechat name: Python Promotion Class

# Version:1.0

# = = def update (self): "adjust the position of the spaceship according to the movement sign" if self.moving_right and self.rect.right

0: self.rect.centerx-= 1

The above code checks the position of the ship before changing the value of rect.centerx. Self.rect.right returns the x coordinate of the right edge of the outer rectangle of the spaceship. if this value is less than the value of self.screen_rect.right, the spacecraft has not touched the right edge of the screen. The situation on the left edge is similar: if the x coordinate of the left edge of the rect is greater than zero, the ship has not touched the left edge of the screen. This ensures that the value of rect.centerx is adjusted only when the ship is in the screen.

If you run alien_invasion.py at this time, the ship will stop moving after touching the left or right edge of the screen.

At this point, the study on "how to realize the alien invasion game by Python" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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