Python-练习 32 循环和列表
the_count = [1, 2, 3, 4, 5]
fruits = ['apples', 'oranges', 'pears', 'apricots']
change = [1, 'pennies', 2, 'dimes', 3, 'quarters']
# this first kind of for-loop goes throuth a list
for number in the_count:
print(f"This is count {number}")
# same as above
for fruit in fruits:
print(f"A fruit of type: {fruit}")
#also we can go through mixed lists too
#notice we have to use {} since we don't know what's in it
for i in change:
print(f"I got {i}")
#we can also build lists, first start with an empty one
elements = []
#then use the range function to do 0 to 5 counts
for i in range(0, 6):
print(f"Adding {i} to the list.")
# append is a function that lists understand
elements.append(i)#append() 方法用于在列表末尾添加新的对象。
#now we can print them out too
for i in elements:
print(f"Element was: {i}")
'''-----------------------------------------------------------------------------'''
'''
1. 看看你是如何使用 range 的。查阅上面的 range 函数并理解掌握。
range() 函数可创建一个整数列表，一般用在 for 循环中。
range(start, stop[, step])
2. 你能在第 22 行不使用 for-loop，而是直接把 range(0, 6) 赋给 elements 吗？
3. 找到 Python 文档关于列表的部分，然后读一读。看看除了 append，你还能对列表做哪些操作？
'''