Python 将 Snake Case 转换为 Lower Camel Case (lowerCamelCase)
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Converting Snake Case to Lower Camel Case (lowerCamelCase)
提问by luca
What would be a good way to convert from snake case (my_string) to lower camel case (myString) in Python 2.7?
my_string在 Python 2.7 中将蛇形 ( )转换为小驼峰 (myString)的好方法是什么？
The obvious solution is to split by underscore, capitalize each word except the first one and join back together.
显而易见的解决方案是用下划线分割，将除第一个之外的每个单词大写，然后重新连接在一起。
However, I'm curious as to other, more idiomatic solutions or a way to use RegExpto achieve this (with some case modifier?)
但是，我很好奇其他更惯用的解决方案或RegExp用于实现此目的的方法（使用某种大小写修饰符？）
采纳答案by jbaiter
def to_camel_case(snake_str):
components = snake_str.split('_')
# We capitalize the first letter of each component except the first one
# with the 'title' method and join them together.
return components[0] + ''.join(x.title() for x in components[1:])
Example:
例子：
In [11]: to_camel_case('snake_case')
Out[11]: 'snakeCase'
回答by Leon Young
>>> snake_case = "this_is_a_snake_case_string"
>>> l = snake_case.split("_")
>>> print l[0] + "".join(map(str.capitalize, l[1:]))
'thisIsASnakeCaseString'
回答by Simeon Visser
Obligatory one-liner:
强制性单线：
import string
def to_camel_case(s):
return s[0].lower() + string.capwords(s, sep='_').replace('_', '')[1:] if s else s
回答by steve
another one liner
另一个班轮
def to_camel_case(snake_string):
return snake_string.title().replace("_", "")
回答by MLev
Building on Steve's answer, this version should work:
基于史蒂夫的回答，这个版本应该可以工作：
def to_camel_case(snake_case_string):
titleCaseVersion = snake_case_string.title().replace("_", "")
camelCaseVersion = titleCaseVersion[0].lower() + titleCaseVersion[1:]
return camelCaseVersion
回答by Berislav Lopac
Here's yet another take, which works only in Python 3.5 and higher:
这是另一个尝试，仅适用于 Python 3.5 及更高版本：
def camel(snake_str):
first, *others = snake_str.split('_')
return ''.join([first.lower(), *map(str.title, others)])
回答by Antoine Pinsard
Here is a solution using regular expressions:
这是使用正则表达式的解决方案：
import re
def snake_to_camel(text):
return re.sub('_([a-zA-Z0-9])', lambda m: m.group(1).upper(), text)
回答by Chandler Childs
def to_camel_case(snake_str):
components = snake_str.split('_')
return reduce(lambda x, y: x + y.title(), components[1:], components[0])
回答by Michael Thiesen
Without using list comprehensions:
不使用列表推导式：
def snake_to_camel_case(text_snake):
return '{}{}'.format(
text_snake[:1].lower(),
text_snake.title().replace('_', '')[1:],
)
回答by Abraham Hernandez
There is also tocamelcaseto easily convert from snake case to camel case.
也tocamelcase可以轻松地从蛇盒转换为骆驼盒。
Install
安装
$ pip install tocamelcase
$ pip install tocamelcase
and then you can use it like this:
然后你可以像这样使用它：
import tocamelcase
print(tocamelcase.convert("non_camel_case"))
# -> non_camel_case → NonCamelCase
There is also decamelizethat is the inverse of this module.
还有就是decamelize这个模块的反面。
