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python development

高洛峰

Release： 2016-10-19 15:07:46

Original

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Summarize some of the operations we perform on strings in the normal development process:

#Letter case conversion

#Convert first letter to uppercase

#Remove special characters in strings (such as: '_', '.', ' ,',';'), and then concatenate the removed strings

#Remove the '_' in 'hello_for_our_world', and capitalize the first letter of the words after the first '_'

Code example :

#字母大小写转换
#首字母转大写
#去除字符串中特殊字符(如：&#39;_&#39;，&#39;.&#39;，&#39;,&#39;，&#39;;&#39;)，然后再把去除后的字符串连接起来
#去除&#39;hello_for_our_world&#39;中的&#39;_&#39;,并且把从第一个&#39;_&#39;以后的单词首字母大写
low_strs = &#39;abcd&#39;
uper_strs = &#39;DEFG&#39;
test_strA = &#39;hello_world&#39;
test_strB = &#39;goodBoy&#39;
test_strC = &#39;hello_for_our_world&#39;
test_strD = &#39;hello__our_world_&#39;
  
#小写转大写
low_strs = low_strs.upper()
print(&#39;abcd小写转大写:&#39;, low_strs)
  
#大写转小写
uper_strs = uper_strs.lower()
print(&#39;DEFG大写转小写：&#39;, uper_strs)
  
#只大写第一个字母
test_strB = test_strB[0].upper() + test_strB[1:]
print(&#39;goodBoy只大写第一个字母:&#39;, test_strB)
  
#去掉中间的&#39;_&#39;,其他符号都是可以的，如：&#39;.&#39;，&#39;,&#39;，&#39;;&#39;
test_strA = &#39;&#39;.join(test_strA.split(&#39;_&#39;))
print(&#39;hello_world去掉中间的\&#39;_\&#39;:&#39;, test_strA)
  
#去除&#39;hello_for_our_world&#39;中的&#39;_&#39;,并且把从第一个&#39;_&#39;以后的单词首字母大写
def get_str(oriStr,splitStr):
    str_list = oriStr.split(splitStr)
    if len(str_list) > 1:
        for index in range(1, len(str_list)):
            if str_list[index] != &#39;&#39;:
                str_list[index] = str_list[index][0].upper() + str_list[index][1:]
            else:
                continue
        return &#39;&#39;.join(str_list)
    else:
        return oriStr
  
print(&#39;去除\&#39;hello_for_our_world\&#39;中的\&#39;_\&#39;,并且把从第一个\&#39;_\&#39;以后的单词首字母大写:&#39;, get_str(test_strC,&#39;_&#39;))
print(&#39;去除\&#39;hello__our_world_\&#39;中的\&#39;_\&#39;,并且把从第一个\&#39;_\&#39;以后的单词首字母大写:&#39;, get_str(test_strD,&#39;_&#39;))

Copy after login

Running effect:

Python 3.3.2 (v3.3.2:d047928ae3f6, May 16 2013, 00:03:43) [MSC v.1600 32 bit (Intel)] on win32

Type "copyright" , "credits" or "license()" for more information.

>>> =============================== = RESTART ================================

>>>

abcd lowercase to uppercase: ABCD

DEFG Convert uppercase to lowercase: defg

goodBoy capitalizes only the first letter: GoodBoy

hello_world removes the '_' in the middle: helloworld

removes the '_' in 'hello_for_our_world' and replaces the ones after the first '_' Capitalize the first letter of the word: helloForOurWorld

Remove the '_' in 'hello__our_world_', and capitalize the first letter of the word after the first '_': helloOurWorld