我正在尝试使用驼峰命名的四个短语

I'm trying to camelCase four phrases

这里是 Python 的超级初学者。到目前为止,这是我的代码:

def make_camel_case(word_string):
    word_list = word_string.split(’ ’)
    output = ’’
    for word in word_list:
        word_upper = word[0].upper()
        output = output+word_upper
    return(output)
def camel_case():
    phrase1 = ’purple people eater’
    phrase2 = ’i can\’t believe it\’s not butter’
    phrase3 = ’heinz 57 sauce’
    print(make_camel_case(phrase1))
    print(make_camel_case(phrase2))
    print(make_camel_case(phrase3))
camel_case()

这是我想要的输出:

purplePeopleEater
iCan’tBelieveIt’sNotButter
heinz57Sauce

我的主要错误消息是 invalid character in identifier in line 2

编辑后我的代码运行正常,但输出:

 PPE
 ICBINB
 H5S

第二行的错误是由于无效字符'.您应该使用单引号 ' ' 或双引号 " " 以空格分隔文本。

然后您可以简单地对每个单词的每个首字母执行 .upper() 以使其变为大写,并在最后将所有单词合并到所需的字符串中。

简单易懂,只需使用 capitalize() 函数:

def make_camel_case(word_string):
    word_list = word_string.split(' ')
    output = ''

    for word in word_list:
        word_upper = word.capitalize()
        output += word_upper
    return output
def camel_case():
    phrase1 = 'purple people eater'
    phrase2 = "i can't believe it’s not butter"
    phrase3 = 'heinz 57 sauce'
    print(make_camel_case(phrase1))
    print(make_camel_case(phrase2))
    print(make_camel_case(phrase3))
camel_case()

您仅将 word_upper 变量中的第一个字符转换为大写。要获得所需的输出,您需要做两件事。

  1. 跳过句子的第一个单词
  2. 将后续单词的第一个字符替换为大写并将其附加到输出。 为此,您必须更改循环并使用 enumerate() 从循环 (see here) 获取单词索引,然后对于后面的单词仅替换第一个字符。 代码将是
def make_camel_case(word_string):
    word_list = word_string.split(' ')
    output = ''
    for i,word in enumerate(word_list):
        if(i != 0):
          word_upper = word[0].upper()
          word = word_upper + word[1:]
        output = output + word
    return(output)
def camel_case():
    phrase1 = 'purple people eater'
    phrase2 = 'i can\'t believe it\'s not butter'
    phrase3 = 'heinz 57 sauce'
    print(make_camel_case(phrase1))
    print(make_camel_case(phrase2))
    print(make_camel_case(phrase3))
camel_case()

为了更干净的解决方案,使用str.capitalize()函数(see here) suggested by @federico-baù.然后函数会变成这样,

def make_camel_case(word_string):
    word_list = word_string.split(' ')
    output = ''
    for i,word in enumerate(word_list):
        if(i != 0):
          word = word.capitalize()
        output = output + word
    return(output)

希望它澄清了你的问题。继续学习。