如何防止Python打印增加换行或空格?(复制)

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How to print without newline or space? 26 answers
如何打印没有换行或空格?26日答案

In python, if I say

在python中，如果我说。

print 'h'

I get the letter h and a newline. If I say

我得到了字母h和换行符。如果我说

print 'h',

I get the letter h and no newline. If I say

我得到了字母h，没有换行符。如果我说

print 'h',
print 'm',

I get the letter h, a space, and the letter m. How can I prevent Python from printing the space?

我得到了字母h，空格和字母m。我如何防止Python打印空格?

The print statements are different iterations of the same loop so I can't just use the + operator.

print语句是同一个循环的不同迭代，所以我不能只使用+运算符。

16 个解决方案

#1

179

You can use:

您可以使用:

sys.stdout.write('h')
sys.stdout.write('m')

#2

242

Just a comment. In Python 3, you will use

只是一个评论。在Python 3中，您将使用

print('h', end='')

to suppress the endline terminator, and

抑制终线终止符，并且

print('a', 'b', 'c', sep='')

to suppress the whitespace separator between items.

在项目之间抑制空白分隔符。

#3

Greg is right-- you can use sys.stdout.write

Greg是对的——您可以使用sys.stdout.write

Perhaps, though, you should consider refactoring your algorithm to accumulate a list of <whatevers> and then

也许，你应该考虑重构你的算法来积累一个然后

lst = ['h', 'm']
print  "".join(lst)

#4

Or use a +, i.e.:

或使用+，例如:

>>> print 'me'+'no'+'likee'+'spacees'+'pls'
menolikeespaceespls

Just make sure all are concatenate-able objects.

只要确保所有的都是可连接的对象。

#5

Python 2.5.2 (r252:60911, Sep 27 2008, 07:03:14)
[GCC 4.3.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> print "hello",; print "there"
hello there
>>> print "hello",; sys.stdout.softspace=False; print "there"
hellothere

But really, you should use sys.stdout.write directly.

但实际上，你应该使用sys.stdout。直接写。

#6

For completeness, one other way is to clear the softspace value after performing the write.

为了完整性，另一种方法是在执行写操作之后清除softspace值。

import sys
print "hello",
sys.stdout.softspace=0
print "world",
print "!"

prints helloworld !

打印helloworld !

Using stdout.write() is probably more convenient for most cases though.

但是，对于大多数情况，使用stdout.write()可能更方便。

#7

This may look stupid, but seems to be the simplest:

这看起来很愚蠢，但似乎是最简单的:

    print 'h',
    print '\bm'

#8

Regain control of your console! Simply:

重新控制控制台!简单:

from __past__ import printf

where __past__.py contains:

__past__的地方。py包含:

import sys
def printf(fmt, *varargs):
    sys.stdout.write(fmt % varargs)

then:

然后:

>>> printf("Hello, world!\n")
Hello, world!
>>> printf("%d %d %d\n", 0, 1, 42)
0 1 42
>>> printf('a'); printf('b'); printf('c'); printf('\n')
abc
>>>

Bonus extra: If you don't like print >> f, ..., you can extending this caper to fprintf(f, ...).

额外奖励:如果你不喜欢打印>> f，…，您可以将这个caper扩展到fprintf(f，…)。

#9

I am not adding a new answer. I am just putting the best marked answer in a better format. I can see that the best answer by rating is using sys.stdout.write(someString). You can try this out:

我没有添加新的答案。我只是把最好的标记答案放在更好的格式。我可以看到，通过评级得到的最佳答案是使用sys.stdout.write(someString)。你可以试试这个:

    import sys
    Print = sys.stdout.write
    Print("Hello")
    Print("World")

will yield:

将收益率:

HelloWorld

That is all.

这是所有。

#10

In python 2.6:

在python 2.6:

>>> print 'h','m','h'
h m h
>>> from __future__ import print_function
>>> print('h',end='')
h>>> print('h',end='');print('m',end='');print('h',end='')
hmh>>>
>>> print('h','m','h',sep='');
hmh
>>>

So using print_function from __future__ you can set explicitly the sep and end parameteres of print function.

因此，在__future__中使用print_function可以显式地设置打印函数的sep和end参数。

#11

You can use print like the printf function in C.

您可以像在C中使用printf函数那样使用print。

e.g.

如。

print "%s%s" % (x, y)

打印“%s%s”% (x, y)

#12

print("{0}{1}{2}".format(a, b, c))

#13

sys.stdout.write is (in Python 2) the only robust solution. Python 2 printing is insane. Consider this code:

sys.stdout。write(在Python 2中)是惟一可靠的解决方案。Python 2打印是疯狂的。考虑这段代码:

print "a",
print "b",

This will print a b, leading you to suspect that it is printing a trailing space. But this is not correct. Try this instead:

这将打印一个b，使您怀疑它正在打印一个尾随空格。但这是不对的。试试这个:

print "a",
sys.stdout.write("0")
print "b",

This will print a0b. How do you explain that? Where have the spaces gone?

这将打印a0b。你怎么解释呢?空间到哪里去了?

I still can't quite make out what's really going on here. Could somebody look over my best guess:

我还是搞不清楚这到底是怎么回事。谁能帮我猜一下?

My attempt at deducing the rules when you have a trailing , on your print:

我试图在你的印刷体上有一个结尾的时候去演绎规则:

First, let's assume that print , (in Python 2) doesn't print any whitespace (spaces nor newlines).

首先，假设print(在Python 2中)不打印任何空格(空格或换行)。

Python 2 does, however, pay attention to how you are printing - are you using print, or sys.stdout.write, or something else? If you make two consecutive calls to print, then Python will insist on putting in a space in between the two.

然而，Python 2确实关注您是如何打印的——您是在使用print还是sys.stdout。写,还是别的?如果您连续两次调用来打印，那么Python会坚持在两者之间放置一个空格。

#14

import sys
a=raw_input()
for i in range(0,len(a)):
       sys.stdout.write(a[i])

#15

print('''first line \
second line''')

it will produce

它将会产生

first line second line

第一行第二行

#16

-2

I had the same problem once I wanted to read some digits from a file. I solved it like this:

当我想从文件中读取一些数字时，我遇到了同样的问题。我是这样解的

f = open('file.txt', 'r')
for line in f:   
    print(str.split(line)[0])

#1

179