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創(chuàng)新互聯(lián)Python教程：Python如何傳遞任意數(shù)量的實(shí)參
傳遞任意數(shù)量的實(shí)參
形參前加一個(gè) * ，python會(huì)創(chuàng)建一個(gè)已形參為名的空元組，將所有收到的值都放到這個(gè)元組中：
def make_pizza(*toppings):
print("\nMaking a pizza with the following toppings: ")
for topping in toppings:
print("- " + topping)
make_pizza('pepperoni')
make_pizza('mushroom', 'green peppers', 'extra cheese')
不管函數(shù)收到多少實(shí)參，這種語法都管用。
1. 結(jié)合使用位置實(shí)參和任意數(shù)量實(shí)參
def make_pizza(size, *toppings):
print("\nMaking a " + str(size) + "-inch pizza with the following toppings: ")
for topping in toppings:
print("- " + topping)
make_pizza(16, 'pepperoni')
make_pizza(12, 'mushroom', 'green peppers', 'extra cheese')
運(yùn)行結(jié)果：
Making a 16-inch pizza with the following toppings: - pepperoni Making a 12-inch pizza with the following toppings: - mushroom - green peppers - extra cheese
相關(guān)推薦：《Python視頻教程》
2. 使用任意數(shù)量的關(guān)鍵字實(shí)參
def build_profile(first, last, **user_info):
profile = dict()
profile['first_name'] = first
profile['last_name'] = last
for key, value in user_info.items():
profile[key] = value
return profile
user_profile = build_profile('albert', 'einstein', location='princeton', field='physic')
print(user_profile)
形參**user_info中的兩個(gè)星號(hào)讓python創(chuàng)建了一個(gè)名為user_info的空字典。
當(dāng)前文章：創(chuàng)新互聯(lián)Python教程：Python如何傳遞任意數(shù)量的實(shí)參
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