"Python from entry to practice" - a variety of situations under Chapter V using an if statement after-school practice

topic:

5-3 Alien color # 1: Assume that in the game just shot and killed an alien, create a variable named alien_color, and set it to 'green', 'yellow' or 'red'.
Write an if statement to check whether an alien is green; if so, print a message saying that players get 5 points.
Two versions of this program written in a version by the above tests, and in another version not passed (no output test fails).
5-4 Alien # 2 Color: as practicing 5-3 to set the color as aliens, and write a if-else structure.
If the alien is green, it prints a message stating that the player due to shooting the aliens gained 5 points.
If the alien is not green, it prints a message saying that players get 10 points.
Two versions of the program write is performed if block in one version, the code block is executed else in another version.
5-5 alien color # 3: Exercise if-else structure was changed to 5-4 if-elif-else structure.
If the alien is green, it prints a message saying that players get 5 points.
If the alien is yellow, it prints a message saying that players get 10 points.
If the alien is red, it prints a message saying that players get 15 points.
Three versions of the preparation of this procedure, they were aliens in green, a message is printed when yellow and red.
5-6 is not all men are born different stages of the same order segment: age of the value of a variable, then write an if-elif-else structure, which is in the stage of life based on the value judgment of age.
If a person younger than 2 years old, print a message that he is a baby.
If a person's age is 2 (inclusive) to 4 years old, it prints a message that he was a toddler.
If a person's age is 4 (inclusive) to 13 years of age, it prints a message that he is a child.
If a person's age to 13 (inclusive) to 20 years of age, print a message that he is young people.
If a person's age to 20 (inclusive) to 65 years, print a message that he is an adult.
If a person over the age of 65 (inclusive) years old, it prints a message that he is older.
5-7 favorite fruit: create a list that contains your favorite fruit, then write a series of separate if statement to check the list contains a specific fruit.
Name the list favorite_fruits, and contains three fruits.
5 if written statement, some kind of fruit each have to check is included in the list, if included in the list, it prints a message such as "You really like bananas!".

Code:

#!usr/bin/python
# _*_ coding:utf-8 _*_
#外星人颜色
alien_color = "blue"
if alien_color == "blue":
    print("You got 5 star")

if alien_color == "blue":
    print("测试通过，外星人为蓝色")

if alien_color == "blue":
    print("")    

#外星人颜色#2
#版本1
killed_alien_color = "blue"
if killed_alien_color == "blue":
    print("You got 5 star,cause you killed him")
else:
    print("You got 10 star")
#版本2
if killed_alien_color == "yellow":
    print("You got 5 star,cause you killed him")
else:
# 1 version
# 3 Color Alien
    Print ( "Star by You GOT 10")

kill_alien_color = "Blue"
if kill_alien_color =="blue":
    print("You got 5 star")
elif kill_alien_color == "yellow":
    print("You got 10 star")
else:
    print("You got 15 star")
    
#版本2
kill_alien_color = "yellow"
if kill_alien_color =="blue":
    print("You got 5 star")
elif kill_alien_color == "yellow":
    print("You got 10 star")
else:
    print("You got 15 star")

#版本3
kill_alien_color = "red"
if kill_alien_color =="blue":
    print("You got 5 star")
elif kill_alien_color == "yellow":
# various stages of life
    Print ( "Star by You GOT 15")
the else:
    Print ( "GOT 10 Star by You")
    
age = 17
if age < 2:
    print("he was a baby！")
elif age >=2 and <4:
    print("Is he learning how to walk!")
elif age >=4 and <13:
    print("he was a chird!")
elif age >=13 and <20:
    print("he was a teenager!")
elif age >=20 and <65:
    print("You are adult!,Young man!")
else:
    print("You are old!")

#喜欢的水果
favorite_fruits = ["bananas","watermalon","apples","oranges","pears"]
if "bananas" in favorite_fruits:
    print("You are really like bananas!")
if "watermalon" in favorite_fruits:
    print("You are really like watermalon!")
if "apples" in favorite_fruits:
    print("You are really like apples!")
if "oranges" in favorite_fruits:
    print("You are really like oranges!")
if "pears" in favorite_fruits:
    print("You are really like pears!")