Python 3 中的翻译函数
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Translate function in Python 3
提问by Dean Clancy
I am using Python 3 and I want to translate my file names to have no numbers. The translate function doesn't seem to work in Python 3. How can I translate the file names to have no numbers?
我正在使用 Python 3，我想将我的文件名转换为没有数字。translate 函数在 Python 3 中似乎不起作用。如何将文件名转换为没有数字？
This is the block of code that doesn't work:
这是不起作用的代码块：
file_name = "123hello.jpg"
file_name.translate(None, "0123456789")
Thanks
谢谢
回答by wim
str.translateis still there, the interface has just changed a little:
str.translate还在，只是界面变了一点：
>>> table = str.maketrans(dict.fromkeys('0123456789'))
>>> '123hello.jpg'.translate(table)
'hello.jpg'
回答by juanpa.arrivillaga
.translatetakes a translation table:
.translate需要一个翻译表：
Return a copy of the string S in which each character has been mapped through the given translation table. The table must implement lookup/indexing via getitem, for instance a dictionary or list, mapping Unicode ordinals to Unicode ordinals, strings, or None. If this operation raises LookupError, the character is left untouched. Characters mapped to None are deleted.
返回字符串 S 的副本，其中每个字符都已通过给定的转换表映射。该表必须通过getitem实现查找/索引，例如字典或列表，将 Unicode 序数映射到 Unicode 序数、字符串或无。如果此操作引发 LookupError，则字符保持不变。映射到 None 的字符被删除。
So you can do something like:
因此，您可以执行以下操作：
>>> file_name = "123hello.jpg"
>>> file_name.translate({ord(c):'' for c in "1234567890"})
'hello.jpg'
>>>
回答by Mativo
I'm using ver3.6.1 and translate did not work. What did work is the strip() methodas follows:
我正在使用 ver3.6.1 并且翻译不起作用。起作用的是strip() 方法，如下所示：
file_name = 123hello.jpg
file_name.strip('123')
回答by udit sharma
Only remove numbers from left
只从左边删除数字
new_name = str.lstrip('1234567890')
Only remove numbers from right
只从右边删除数字
new_name = str.rstrip('123456780')
Remove number from left and right
从左右删除数字
new_name = str.strip('1234567890')
Remove all numbers
删除所有数字
new_name = str.translate(str.maketrans('', '', '1234567890'))
