blocks|key|577312|text|一种常见的方法是将时间戳作为前缀/后缀添加到文件名，以便与文件具有某种时间关系。如果你需要更多的唯一性，你仍然可以添加一个随机的字符串。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|577313|import+datetime
basename+=+"mylogfile"
suffix+=+datetime.datetime.now().strftime("%25y%25m%25d_%25H%25M%25S")
filename+=+"_".join([basename,+suffix])+#+e.g.+'mylogfile_120508_171442'|code-block|syntax|javascript|577314|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

a common approach is to add a timestamp as a prefix/suffix to the filename to have some temporal relation to the file. If you need more uniqueness you can still add a random string to this.

<pre><code>import datetime
basename = "mylogfile"
suffix = datetime.datetime.now().strftime("%y%m%d_%H%M%S")
filename = "_".join([basename, suffix]) # e.g. 'mylogfile_120508_171442'
</code></pre>

blocks|key|577370|text|如果您希望将原始文件名保留为新文件名的一部分，可以使用当前时间的MD5散列生成统一长度的唯一前缀：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|577371|from+hashlib+import+md5
from+time+import+localtime

def+add_prefix(filename):
++++prefix+=+md5(str(localtime()).encode('utf-8')).hexdigest()
++++return+f"{prefix}_{filename}"|code-block|syntax|javascript|577372|对add_prefix('style.css')的调用会生成如下序列：|577373|a38ff35794ae366e442a0606e67035ba_style.css
7a5f8289323b0ebfdbc7c840ad3cb67b_style.css|577374|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

If you want to preserve the original filename as a part of the new filename, unique prefixes of uniform length can be generated by using MD5 hashes of the current time:
<pre><code>from hashlib import md5
from time import localtime

def add_prefix(filename):
 prefix = md5(str(localtime()).encode('utf-8')).hexdigest()
 return f&quot;{prefix}_{filename}&quot;
</code></pre>
Calls to the add_prefix('style.css') generates sequence like:
<pre><code>a38ff35794ae366e442a0606e67035ba_style.css
7a5f8289323b0ebfdbc7c840ad3cb67b_style.css
</code></pre>

blocks|key|577549|text|如果您不需要文件路径，而只需要具有预定义长度的随机字符串，则可以使用以下内容。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|577550|>>>+import+random
>>>+import+string

>>>+file_name+=+''.join(random.choice(string.ascii_lowercase)+for+i+in+range(16))
>>>+file_name
'ytrvmyhkaxlfaugx'|code-block|syntax|javascript|577551|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you need no the file path, but only the random string having predefined length you can use something like this.

<pre><code>&gt;&gt;&gt; import random
&gt;&gt;&gt; import string

&gt;&gt;&gt; file_name = ''.join(random.choice(string.ascii_lowercase) for i in range(16))
&gt;&gt;&gt; file_name
'ytrvmyhkaxlfaugx'
</code></pre>

blocks|key|577429|text|在这里补充我的两点意见：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|577430|In+[19]:+tempfile.mkstemp('.png',+'bingo',+'/tmp')[1]
Out[19]:+'/tmp/bingoy6s3_k.png'|code-block|syntax|javascript|577431|根据tempfile.mkstemp的python文档，它以最安全的方式创建一个临时文件。请注意，该文件将在此调用后存在：|577432|In+[20]:+os.path.exists(tempfile.mkstemp('.png',+'bingo',+'/tmp')[1])
Out[20]:+True|577433|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Adding my two cents here:

<pre><code>In [19]: tempfile.mkstemp('.png', 'bingo', '/tmp')[1]
Out[19]: '/tmp/bingoy6s3_k.png'
</code></pre>

According to the python doc for tempfile.mkstemp, it creates a temporary file in the most secure manner possible. Please note that the file will exist after this call:

<pre><code>In [20]: os.path.exists(tempfile.mkstemp('.png', 'bingo', '/tmp')[1])
Out[20]: True
</code></pre>

blocks|key|362090|text|由于日期和时间在每一秒之后都会发生变化，因此您需要将data-time与uuid+(通用唯一标识符)连接在一起，以下是您的答案的完整代码|type|unstyled|depth|inlineStyleRanges|entityRanges|data|362091|+++import+uuid
+++imageName+=+'{}{:-%25Y%25m%25d%25H%25M%25S}.jpeg'.format(str(uuid.uuid4().hex),+datetime.now())|code-block|syntax|javascript|362092|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

As date and time both change after each second so you need to concatenate data-time with uuid (Universally Unique Identifiers)
here is the complete code for your answer
<pre><code> import uuid
 imageName = '{}{:-%Y%m%d%H%M%S}.jpeg'.format(str(uuid.uuid4().hex), datetime.now())
</code></pre>

blocks|key|362006|text|>>>+import+random
>>>+import+string++++
>>>+alias+=+''.join(random.choice(string.ascii_letters)+for+_+in+range(16))
>>>+alias
'WrVkPmjeSOgTmCRG'|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|362007|您可以根据需要将'string.ascii_letters‘更改为任何字符串格式，以生成任何其他文本，例如手机号码、ID...|unstyled|362008|📷|atomic|offset|length|362009|​|362010|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/a300ee5edbbe1d2af00b1911c6584d01.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|X|8|@]|9|@]|A|$]]|$1|G|3|H|5|I|7|Y|8|@]|9|@$J|Z|K|10|1|11]]|A|$]]|$1|L|3|M|5|F|7|12|8|@]|9|@]|A|$]]|$1|N|3|-4|5|F|7|13|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|U|V|-4]]]]

<pre><code>&gt;&gt;&gt; import random
&gt;&gt;&gt; import string 
&gt;&gt;&gt; alias = ''.join(random.choice(string.ascii_letters) for _ in range(16))
&gt;&gt;&gt; alias
'WrVkPmjeSOgTmCRG'
</code></pre>

You could change 'string.ascii_letters' to any string format as you like to generate any other text, for example mobile NO, ID...
<a href="https://i.stack.imgur.com/JkXs0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JkXs0.png" alt="enter image description here"></a>

blocks|key|577842|text|import+random

def+Generate():+#function+generates+a+random+6+digit+number
++++code+=+''
++++for+i+in+range(6):
++++++++code+%2B=+str(random.randint(0,9))
++++return+code

print(Generate()%2B".txt")|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|577843|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>import random

def Generate(): #function generates a random 6 digit number
 code = ''
 for i in range(6):
 code += str(random.randint(0,9))
 return code

print(Generate()+&quot;.txt&quot;)

</code></pre>

blocks|key|577891|text|在其他一些情况下，如果您需要使用合理的随机文件名，请使用faker模块。这将生成具有通用扩展名的“合理”文件名。此方法可能会在一段时间后发生名称冲突。我认为使用uuid作为前缀可能更好。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|577892|pip+install+faker|code-block|syntax|javascript|577893|然后,|577894|from+faker+import+Faker

fake+=+Faker()
for+_+in+range(10):
++++print(fake.file_name())|577895|指向faker文档的链接：https://faker.readthedocs.io/en/master/index.html|577896|entityMap|0|LINK|mutability|MUTABLE|url|https://faker.readthedocs.io/en/master/index.html^0|S|5|28|4|0|0|0|0|2|5|D|1D|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|14|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|16|8|@$9|17|A|18|B|C]]|D|@$9|19|A|1A|1|1B]]|E|$]]|$1|Q|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]]]

In some other cases if you need the random file name to be sensible, use the <code>faker</code> module. This will produce &quot;sensible&quot; file names with common extension. This method might have name collision after some time. I think prepend with <code>uuid</code> is probably better.
<pre><code>pip install faker
</code></pre>
Then,
<pre><code>from faker import Faker

fake = Faker()
for _ in range(10):
 print(fake.file_name())

</code></pre>
Link to <code>faker</code> documentation: <a href="https://faker.readthedocs.io/en/master/index.html" rel="nofollow noreferrer">https://faker.readthedocs.io/en/master/index.html</a>

blocks|key|577483|text|你可以使用随机包：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|577484|import+random
file+=+random.random()|code-block|syntax|javascript|577485|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You could use the random package:

<pre><code>import random
file = random.random()
</code></pre>

In Python, what is a good, or the best way to generate some random text to prepend to a file(name) that I'm saving to a server, just to make sure it does not overwrite. Thank you!

Best way to generate random file names in Python

在Python中，什么是好的，或者说最好的方法来生成一些随机文本，将其添加到我正保存到服务器上的文件(名称)中，以确保它不会被覆盖。谢谢!

问在Python中生成随机文件名的最佳方法
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