Python 我如何知道用户输入的一句话的长度——不是整个输入——只是句子

我想做的是，我想做一个程序，用一种特殊的方式写用户的句子 我这样做是因为我完成了一门python速成课程，并且我正在坚持我的想法，这样我就可以进行机器学习，然后再学习其他语言。 谢谢

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同位素

我想至少对我来说，这有点不清楚。你能给出一个你想要的例子吗？你需要澄清一个句子的定义。例如，它可能以特定字符结尾，例如

[\！\.\？]

，然后对这些字符使用类似于

re.split（）

的内容（为了安全起见，我对这些字符进行了转义，这可能是不必要的）。然后只需在第一句话中使用

len（）

，即可获得字符数。谢谢，还有一条路要走！

import sys

# what does the program do
#   1- Recieve input from the user about what sentence does he want to write.
#   2- Recieve input from the user about WHAT sentences you want the system to write out using WHAT?.
#   3- Make a list about each sentence length.
#   4- Make if conditionals if any word from the alphabet exists in the sentence.
#   5- If that word existed it's gonna try to print it from the if conditional.
#   6- Make spaces betweeen each word with "------"
#   7- At last Print it
while true:
    # input the user what does the sys want to type + what words
    print("_" * 10)
    words = input("What do you want the system to write?:  ")
    material = input("With what words (it can be 1 word or a sentence):  ")
    thick = input("Alrite it's made out of {} then how thick can it be - give it a try!:  ").format(material)
    # Back-end of the program