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Python傳遞任意數(shù)量實(shí)參的方法?這個(gè)問(wèn)題可能是我們?nèi)粘W(xué)習(xí)或工作經(jīng)常見到的。希望通過(guò)這個(gè)問(wèn)題能讓你收獲頗深。下面是小編給大家?guī)?lái)的參考內(nèi)容,讓我們一起來(lái)看看吧!
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(yǔ)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
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。
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