#coding=utf-8
def cheese_and_crackers(cheese_count, boxes_of_crackers):
print "You have %d cheeses!" % cheese_count
print "You have %d boxes of crackers!" % boxes_of_crackers
print "Man that's enough for a party!"
print "Get a blanket. \n"
print "We can just give the function numbers directly:"
cheese_and_crackers(20, 30)
print "Or,we can use variables from our script:"
amount_of_cheese = 10
amount_of_crackers = 50
cheese_and_crackers(amount_of_cheese, amount_of_crackers)
print "We can even do math inside too:"
cheese_and_crackers(10 + 20, 5 + 6)
print "And we can combine the two, variables and math:"
cheese_and_crackers(amount_of_cheese + 100, amount_of_crackers + 1000)
從代碼上看怀伦，這節(jié)課講解了函數(shù)參數(shù)的幾種表達(dá)方法及塘，也就是函數(shù)的調(diào)用方法尤勋，需要注意的幾個(gè)小問題：
- amount_of_cheese和amount_of_crackers這兩個(gè)變量會(huì)不會(huì)改變函數(shù)中的變量?
不會(huì)浴栽，這些變量是在函數(shù)之外的肚吏，當(dāng)它他們被傳遞到函數(shù)中以后吮蛹，函數(shù)會(huì)為這些變量創(chuàng)建一些臨時(shí)的版本荤崇，當(dāng)函數(shù)運(yùn)行結(jié)束后，這些臨時(shí)變量就會(huì)被丟棄了潮针，一切又回到了之前术荤，但盡量不要讓全局變量與函數(shù)中的變量重名。
