字串 string

text = "Hello {name}"
print(text.replace('{name}', 'KJ'))

# Hello KJ

text = "Hello {name}, this {price:.2f} dollars is for you!"
print(text.format(name='KJ', price = 49))

# Hello KJ, this 49.00 dollars is for you!

text = "Hello {name}, this {price:x} dollars is for you!"
print(text.format(name='KJ', price = 49))

# Hello KJ, this 31 dollars is for you!

# 翻译来源
translate_source = "aeiou"
# 翻译目标
translate_target = "AEIOU"
# 翻译表
translate_mapping = str.maketrans(translate_source, translate_target)

# 翻译字串
text = "this is string example....wow!!!"
print(text.translate(translate_mapping))

# thIs Is strIng ExAmplE....wOw!!!