Python中maketrans和replace的区别是什么?
如果以前有人问过,我会道歉。我正在试着去掉绳子上的刺。我知道怎么做,但我不理解Python中maketrans和replace之间的区别。更具体地说,为什么下面的代码场景1删除了传入字符串中的所有标点符号,而场景2没有 情景1Python中maketrans和replace的区别是什么?,python,string,punctuation,Python,String,Punctuation,如果以前有人问过,我会道歉。我正在试着去掉绳子上的刺。我知道怎么做,但我不理解Python中maketrans和replace之间的区别。更具体地说,为什么下面的代码场景1删除了传入字符串中的所有标点符号,而场景2没有 情景1 def average(x): table = x.maketrans('.,?!:','$$$$$') x = x.translate(table) x = x.replace('$', '') lst1 = x.split()
def average(x):
table = x.maketrans('.,?!:','$$$$$')
x = x.translate(table)
x = x.replace('$', '')
lst1 = x.split()
lst2 = []
for i in lst1:
length = len(i)
lst2.append(len(i))
average = sum(lst2) / len(lst2)
return average
str1 = input("Enter a sentence:")
print('The average amount of chars in that sentence is: ', average(str1))
情景2
def average(x):
x = x.replace('.,?!:','')
lst1 = x.split()
lst2 = []
for i in lst1:
length = len(i)
lst2.append(len(i))
average = sum(lst2) / len(lst2)
return average
str1 = input("Enter a sentence:")
print('The average amount of chars in that sentence is: ', average(str1))
.replace()
执行子字符串替换-它尝试将第一个参数的全部匹配为一个块,并将其替换为第二个参数的全部
.maketrans
+.translate
执行字符级翻译-它将第一个参数中的每个字符替换为第二个参数中的相应字符。谢谢!我现在明白了。