笨辦法學Python ex32

循環(huán)和列表

  • 輸入：
# -*- coding: utf-8 -*-

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 through a list
for number in the_count:
    print "This is count %d" % number

#  same as above
for fruit in fruits:
    print "A fruit of type: %s" % fruit

# also we can go through mixed lists too
# notice we have to use %r since we don't know what's in it
for i in change:
    print "I got %r" % 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 "Adding %d to the list." % i
    # append is a function that lists understand
    elements.append(i) # append() 方法用于在列表末尾添加新的對象。

# now we can print them out too
for i in elements:
    print "Element was: %d" % i

  • 運行：

附加題

  • 是否可以直接將 elements 賦值為 range(0,6)，而無需使用 for 循環(huán)？------------ 是。

  • 出了append()之外還有什么用法？
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