在字符之间添加单个空格，在单词之间添加多个空格

Question

我有一个字符串到莫尔斯函数，我知道我有它，莫尔斯字符之间有一个空格，如果有多个单词，仍然有一个空格。如何在每个单词之间保留4个空格，并在字符之间保留单个空格？我已经添加了encodechartomose函数

def encodeChartoMorse(text_input):
  char=text_input.upper()
  if (char == "A"):
    char= ".-"
  elif (char == "B"):
    char= "-..."
  elif (char== "C"):
    char= "-.-."
  elif (char == "D"):
    char= "-.."
  elif (char == "E"):
    char= "."
  elif (char == "F"):
    char= "..-."
  elif (char == "G"):
    char= "--."
  elif (char == "H"):
    char= "...."
  elif (char == "I"):
    char= ".."
  elif (char == "J"):
    char= ".---"
  elif (char == "K"):
    char= "-.-"
  elif (char == "L"):
    char= ".-.."
  elif (char == "M"):
    char= "--"
  elif (char == "N"):
    char= "-."
  elif (char == "O"):
    char= "---"
  elif (char == "P"):
    char= ".--."
  elif (char == "Q"):
    char= " --.-" 
  elif (char == "R"):
    char= ".-."
  elif (char == "S"):
    char= "..."
  elif (char == "T"):
    char= "-" 
  elif (char == "U"):
    char= "..-" 
  elif (char == "V"):
    char= "...-"
  elif (char == "W"):
    char= ".--"
  elif (char == "X"):
    char= "-..-"
  elif (char == "Y"):
    char= "-.--"
  elif (char == "Z"):
    char= "--.."
  else:
    char= '*'
  
  return char



 def encodeStringtoMorse(text_input):
  
  length=len(text_input)
  morse=''
  for x in range(0, length):
    char= encodeChartoMorse(text_input[x])
    morse=morse + ' ' + char

  return morse

Answer 1

与许多其他编程语言不同，Python允许您在单词中的字母列表中循环元素，而无需使用索引。在这种情况下，您需要循环文本中的单词（在编码单词之间放置4个空格），对于每个单词，循环每个字母（在编码字母之间放置1个空格）。最后，Python字典是将键（如字母）映射到值（如摩尔斯电码）的有效方法，而无需使用if-then-else逻辑

编辑：根据下面的评论，当我在上面提到“循环文本中的单词”时，问一下这是如何实现的是一个公平的问题？在我的示例中，我使用Python的split()string方法将文本字符串拆分为单独的单词。它试图通过查找要拆分字符串的空格（默认情况下），从字符串创建子字符串列表。结果列表为我们提供了一种方便的方法，在编码过程中循环文本中的单词

例如：

letter_to_morse = {
    "A": ".-",
    "B": "-...",
    "C": "-.-.",
    "D": "-..",
    "E": ".",
    "F": "..-.",
    "G": " .",
    "H": "....",
    "I": "..",
    "J": ". -",
    "K": "-.-",
    "L": ".-..",
    "M": " ",
    "N": "-.",
    "O": " -",
    "P": ". .",
    "Q": "  .-",
    "R": ".-.",
    "S": "...",
    "T": "-",
    "U": "..-",
    "V": "...-",
    "W": ". ",
    "X": "-..-",
    "Y": "-. ",
    "Z": " ..",
}

def encode_text_to_morse(text):
    text_list = text.upper().split()
    for word in text_list:
        morse_word = []
        for letter in word:
            morse_word.append(letter_to_morse.get(letter, "*"))
        char_space = " "
        word_space = "    "
        print(char_space.join(morse_word), end=word_space)


encode_text_to_morse("The quick brown fox jumps over the lazy dog")

输出：

- .... .       .- ..- .. -.-. -.-     -... .-.  - .  -.     ..-.  - -..-     . - ..-   . . ...      - ...- . .-.     - .... .     .-.. .-  .. -.      -..  -  .