拼接字串的6種方法總結:

1.自C語言的%方式

print('第 %d 種：' % 1)
url = 'this is a %s and %s'
print(url % ('dog', 'cat'))

2.format()拼接方式

print('第 %d 種：' % 2)
url = 'this is a {} and {}'
print(url.format('dog', 'cat'))
url = 'this is a {animal1} and {animal2}'
print(url.format(animal1='dog', animal2='cat'))

3.() 類似元組方式

print('第 %d 種：' % 3)
url = 'this is a dog and'
print(url, 'cat')

4.常用的+號方式，都必須是字串型別

print('第 %d 種：' % 4)
url = 'this is a dog and '
print(url + 'cat')

5.join()拼接方式

print('第 %d 種：' % 5)
url_list = ['this is a dog ', ' cat']
print('and'.join(url_list))

6.f-string方式

print('第 %d 種：' % 6)
animal = 'cat'
url = f'this is a dog and {animal}'
print(url)
 

結果：

第 1 種：
this is a dog and cat
第 2 種：
this is a dog and cat
this is a dog and cat
第 3 種：
this is a dog and cat
第 4 種：
this is a dog and cat
第 5 種：
this is a dog and cat
第 6 種：
this is a dog and cat