blocks|key|2429679|text|在Python2.x中，只需使用ord和chr函数：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2429680|>>>+ord('c')
99
>>>+ord('c')+%2B+1
100
>>>+chr(ord('c')+%2B+1)
'd'
>>>+|code-block|syntax|javascript|2429681|Python3.x使这项工作更有条理、更有趣，因为它明确区分了字节和unicode。默认情况下，"string“是unicode，所以上面的方法是有效的(ord接收Unicode字符，chr生成它们)。|2429682|但是如果你对字节感兴趣(比如处理一些二进制数据流)，事情就更简单了：|2429683|>>>+bstr+=+bytes('abc',+'utf-8')
>>>+bstr
b'abc'
>>>+bstr[0]
97
>>>+bytes([97,+98,+99])
b'abc'
>>>+bytes([bstr[0]+%2B+1,+98,+99])
b'bbc'|2429684|entityMap^0|G|3|K|3|0|0|25|3|2K|3|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|M|3|N|5|6|7|13|8|@]|D|@]|E|$]]|$1|O|3|P|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|Q|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|R|$]]

In Python 2.x, just use the <code>ord</code> and <code>chr</code> functions:

<pre><code>&gt;&gt;&gt; ord('c')
99
&gt;&gt;&gt; ord('c') + 1
100
&gt;&gt;&gt; chr(ord('c') + 1)
'd'
&gt;&gt;&gt; 
</code></pre>

Python 3.x makes this more organized and interesting, due to its clear distinction between bytes and unicode. By default, a "string" is unicode, so the above works (<code>ord</code> receives Unicode chars and <code>chr</code> produces them).

But if you're interested in bytes (such as for processing some binary data stream), things are even simpler:

<pre><code>&gt;&gt;&gt; bstr = bytes('abc', 'utf-8')
&gt;&gt;&gt; bstr
b'abc'
&gt;&gt;&gt; bstr[0]
97
&gt;&gt;&gt; bytes([97, 98, 99])
b'abc'
&gt;&gt;&gt; bytes([bstr[0] + 1, 98, 99])
b'bbc'
</code></pre>

blocks|key|28767|text|“没有传统的for(;;)循环已经够糟糕的了”？？什么？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|28768|你想要做的是|28769|import+string
for+c+in+string.lowercase:
++++...do+something+with+c...|code-block|syntax|javascript|28770|或者，您可能正在使用string.uppercase或string.letters|offset|length|style|CODE|28771|Python没有for(;;)，因为通常有更好的方法来实现它。它也没有字符数学，因为它也不是必需的。|28772|entityMap^0|0|0|0|A|G|R|E|0|8|7|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@$K|W|L|X|M|N]|$K|Y|L|Z|M|N]]|9|@]|A|$]]|$1|O|3|P|5|6|7|10|8|@$K|11|L|12|M|N]]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|R|$]]

"bad enough not having a traditional for(;;) looper"?? What? 

Are you trying to do 

<pre><code>import string
for c in string.lowercase:
 ...do something with c...
</code></pre>

Or perhaps you're using <code>string.uppercase</code> or <code>string.letters</code>?

Python doesn't have <code>for(;;)</code> because there are often better ways to do it. It also doesn't have character math because it's not necessary, either.

blocks|key|28825|text|我来自PHP，在那里你可以增加char+(A到B，Z到AA，AA到AB等等)。使用%2B%2B操作符。我用Python做了一个简单的函数来做同样的事情。您还可以将字符列表更改为任意字符(小写、大写等)。是你的需要。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|28826|#+Increment+char+(a+->+b,+az+->+ba)
def+inc_char(text,+chlist+=+'ABCDEFGHIJKLMNOPQRSTUVWXYZ'):
++++#+Unique+and+sort
++++chlist+=+''.join(sorted(set(str(chlist))))
++++chlen+=+len(chlist)
++++if+not+chlen:
++++++++return+''
++++text+=+str(text)
++++#+Replace+all+chars+but+chlist
++++text+=+re.sub('[%5E'+%2B+chlist+%2B+']',+'',+text)
++++if+not+len(text):
++++++++return+chlist[0]
++++#+Increment
++++inc+=+''
++++over+=+False
++++for+i+in+range(1,+len(text)%2B1):
++++++++lchar+=+text[-i]
++++++++pos+=+chlist.find(lchar)+%2B+1
++++++++if+pos+<+chlen:
++++++++++++inc+=+chlist[pos]+%2B+inc
++++++++++++over+=+False
++++++++++++break
++++++++else:
++++++++++++inc+=+chlist[0]+%2B+inc
++++++++++++over+=+True
++++if+over:
++++++++inc+%2B=+chlist[0]
++++result+=+text[0:-len(inc)]+%2B+inc
++++return+result|code-block|syntax|javascript|28827|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|$]]

I came from PHP, where you can increment char (A to B, Z to AA, AA to AB etc.) using ++ operator. I made a simple function which does the same in Python. You can also change list of chars to whatever (lowercase, uppercase, etc.) is your need.

<pre><code># Increment char (a -&gt; b, az -&gt; ba)
def inc_char(text, chlist = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'):
 # Unique and sort
 chlist = ''.join(sorted(set(str(chlist))))
 chlen = len(chlist)
 if not chlen:
 return ''
 text = str(text)
 # Replace all chars but chlist
 text = re.sub('[^' + chlist + ']', '', text)
 if not len(text):
 return chlist[0]
 # Increment
 inc = ''
 over = False
 for i in range(1, len(text)+1):
 lchar = text[-i]
 pos = chlist.find(lchar) + 1
 if pos &lt; chlen:
 inc = chlist[pos] + inc
 over = False
 break
 else:
 inc = chlist[0] + inc
 over = True
 if over:
 inc += chlist[0]
 result = text[0:-len(inc)] + inc
 return result
</code></pre>

blocks|key|1020550|text|def+doubleChar(str):
++++result+=+''
++++for+char+in+str:
++++++++result+%2B=+char+*+2
++++return+result

print(doubleChar("amar"))|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1020551|输出：|unstyled|1020552|aammaarr|1020553|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>def doubleChar(str):
 result = ''
 for char in str:
 result += char * 2
 return result

print(doubleChar("amar"))
</code></pre>

output: 

<pre><code>aammaarr
</code></pre>

blocks|key|1020577|text|有一种方法可以使用string包中的ascii_letters来增加字符，ascii_letters是一个包含所有英文字母、大写和小写的字符串：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1020578|>>>+from+string+import+ascii_letters
>>>+ascii_letters[ascii_letters.index('a')+%2B+1]
'b'
>>>+ascii_letters
'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'|code-block|syntax|javascript|1020579|也可以手动完成；|1020580|>>>+letters+=+'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
>>>+letters[letters.index('c')+%2B+1]
'd'|1020581|entityMap^0|9|6|I|D|11|D|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|10|8|@]|D|@]|E|$]]]|P|$]]

There is a way to increase character using <code>ascii_letters</code> from <code>string</code> package which <code>ascii_letters</code> is a string that contains all English alphabet, uppercase and lowercase:

<pre class="lang-py prettyprint-override"><code>&gt;&gt;&gt; from string import ascii_letters
&gt;&gt;&gt; ascii_letters[ascii_letters.index('a') + 1]
'b'
&gt;&gt;&gt; ascii_letters
'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
</code></pre>

Also it can be done manually;

<pre class="lang-py prettyprint-override"><code>&gt;&gt;&gt; letters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
&gt;&gt;&gt; letters[letters.index('c') + 1]
'd'
</code></pre>

blocks|key|1020602|text|检查以下内容:使用FOR循环|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1020603|for+a+in+range(5):
++++x='A'
++++val=chr(ord(x)+%2B+a)
++++print(val)|code-block|syntax|javascript|1020604|循环输出:A、B、C、D、E|1020605|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Check this: USING FOR LOOP
<pre><code>for a in range(5):
 x='A'
 val=chr(ord(x) + a)
 print(val)
</code></pre>
LOOP OUTPUT: A B C D E

blocks|key|1020623|text|对我来说，休闲是一种测试。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1020624|string_1="abcd"

def+test(string_1):
+++i+=+0
+++p+=+""
+++x+=+len(string_1)
+++while+i+<+x:
++++y+=+(string_1)[i]
++++i=i%2B1
++++s+=+chr(ord(y)+%2B+1)
++++p=p%2Bs

+++print(p)

test(string_1)|code-block|syntax|javascript|1020625|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|$]]

For me i made the fallowing as a test.
<pre><code>string_1=&quot;abcd&quot;

def test(string_1):
 i = 0
 p = &quot;&quot;
 x = len(string_1)
 while i &lt; x:
 y = (string_1)[i]
 i=i+1
 s = chr(ord(y) + 1)
 p=p+s

 print(p)

test(string_1)
</code></pre>

I'm new to Python, coming from Java and C. How can I increment a char? In Java or C, chars and ints are practically interchangeable, and in certain loops, it's very useful to me to be able to do increment chars, and index arrays by chars. 

How can I do this in Python? It's bad enough not having a traditional for(;;) looper - is there any way I can achieve what I want to achieve without having to rethink my entire strategy?

How can I increment a char?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我是Python的新手，来自Java和C语言，我如何增加一个字符？在Java或C中，字符和整数实际上是可以互换的，在某些循环中，能够执行增量字符和按字符索引数组对我来说非常有用。我如何在Python中做到这一点？没有传统的for(;;)循环已经够糟糕的了--有没有办法在不重新考虑我的整个策略的情况下实现我想要的目标？

问如何递增char？
EN

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问如何递增char？EN